c#的很多操作

using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.Win32; //对注册表操作
using System.Collections; //使用Arraylist
using System.Security.Cryptography;//加密解密
using System.IO;    //文件操作
using System.Runtime.InteropServices;//调用DLL DllImport
using System.Management;  //获取硬件信息
using System.Net;       //获取IP地址是用到
using System.Drawing;   //image
using System.Net.NetworkInformation;    //ping 用到
using System.Text.RegularExpressions;   //正则
using System.Data;
using System.Data.SqlClient;
using Microsoft.VisualBasic;   //简体转繁体时用到
using System.Web;       //html UrlEncode

//注册表操作
    public class GF_RegReadWrite
    {
      
        /// <summary>
        /// 读取路径为keypath，键名为keyname的注册表键值，缺省返回def
        /// </summary>
        /// <param name="rootkey"></param>
        /// <param name="keypath">路径</param>
        /// <param name="keyname">键名</param>
        /// <param name="rtn">默认为null</param>
        /// <returns></returns>       
        static public bool GetRegVal(RegistryKey rootkey, string keypath, string keyname, out string rtn)
        {
            rtn = "";
            try
            {
                RegistryKey key = rootkey.OpenSubKey(keypath);
                rtn = key.GetValue(keyname).ToString();
                key.Close();
                return true;
            }
            catch
            {
                return false;
            }
        }
    
        /// <summary>
        /// 设置路径为keypath，键名为keyname的注册表键值为keyval
        /// </summary>
        /// <param name="rootkey"></param>
        /// <param name="keypath"></param>
        /// <param name="keyname"></param>
        /// <param name="keyval"></param>
        /// <returns></returns>
        static public bool SetRegVal(RegistryKey rootkey, string keypath, string keyname, string keyval)
        {
            try
            {
                RegistryKey key = rootkey.OpenSubKey(keypath, true);
                if (key == null)
                    key = rootkey.CreateSubKey(keypath);
                key.SetValue(keyname, (object)keyval);
                key.Close();
                return true;
            }
            catch
            {
                return false;
            }
        }

        /// 创建路径为keypath的键
        private RegistryKey CreateRegKey(RegistryKey rootkey, string keypath)
        {
            try
            {
                return rootkey.CreateSubKey(keypath);
            }
            catch
            {
                return null;
            }
        }
        /// 删除路径为keypath的子项
        private bool DelRegSubKey(RegistryKey rootkey, string keypath)
        {
            try
            {
                rootkey.DeleteSubKey(keypath);
                return true;
            }
            catch
            {
                return false;
            }
        }
        /// 删除路径为keypath的子项及其附属子项
        private bool DelRegSubKeyTree(RegistryKey rootkey, string keypath)
        {
            try
            {
                rootkey.DeleteSubKeyTree(keypath);
                return true;
            }
            catch
            {
                return false;
            }
        }
        /// 删除路径为keypath下键名为keyname的键值
        private bool DelRegKeyVal(RegistryKey rootkey, string keypath, string keyname)
        {
            try
            {
                RegistryKey key = rootkey.OpenSubKey(keypath, true);
                key.DeleteValue(keyname);
                return true;
            }
            catch
            {
                return false;
            }
        }
    }
//类型转换
    public class GF_Convert
    {
        /// <summary>
        /// 字符串 转换 char数组
        /// </summary>
        /// <param name="in_str"></param>
        /// <param name="in_len"></param>
        /// <returns></returns>
        public static char[] string2chararray(string in_str, int in_len)
        {
            char[] ch = new char[in_len];
            in_str.ToCharArray().CopyTo(ch, 0);
            return ch;
        }

        /// <summary>
        /// char数组 转换 字符串
        /// </summary>
        /// <param name="in_str"></param>
        /// <returns></returns>       
        public static string chararray2string(char[] in_str)
        {
            string out_str;
            out_str = new string(in_str);
            int i = out_str.IndexOf('/0', 0);
            if (i == -1)
                i = 16;
            return out_str.Substring(0, i);
        }

        /// <summary>
        /// byte数组 转换 字符串
        /// </summary>
        /// <param name="in_str"></param>
        /// <returns></returns>
        public static string bytearray2string(byte[] in_str)
        {
            string out_str;
            out_str = System.Text.Encoding.Default.GetString(in_str);
            return out_str.Substring(0, out_str.IndexOf('/0', 0));

        }

        /// <summary>
        /// 字符串 转换 byte数组  注意转换出来会使原来的bytearray长度变短
        /// </summary>
        /// <param name="in_str"></param>
        /// <returns></returns>
        public static byte[] string2bytearray(string in_str)
        {
            return System.Text.Encoding.Default.GetBytes(in_str);
        }

        /// <summary>
        /// 字符串 转换 byte数组  长度为传如的长度
        /// </summary>
        /// <param name="in_str">传入字符串</param>
        /// <param name="iLen">目标字节数组长度</param>
        /// <returns></returns>
        public static byte[] string2bytearray(string in_str, int iLen)
        {
            byte[] bytes = new byte[iLen];
            byte[] bsources=System.Text.Encoding.Default.GetBytes(in_str);
            Array.Copy(bsources, bytes, bsources.Length);
           
           
            return bytes;
        }
       
        /// <summary>
        /// 将字符串编码为Base64字符串
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static string Base64Encode(string str)
        {
            byte[] barray;
            barray = Encoding.Default.GetBytes(str);
            return Convert.ToBase64String(barray);
        }

        /// <summary>
        /// 将Base64字符串解码为普通字符串
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static string Base64Decode(string str)
        {
            byte[] barray;
            try
            {
                barray = Convert.FromBase64String(str);
                return Encoding.Default.GetString(barray);
            }
            catch
            {
                return str;
            }
        }

        /// <summary>
        /// 图片 转换 byte数组
        /// </summary>
        /// <param name="pic"></param>
        /// <param name="fmt"></param>
        /// <returns></returns>
        public static byte[] image_Image2Byte(Image pic, System.Drawing.Imaging.ImageFormat fmt)
        {
            MemoryStream mem = new MemoryStream();
            pic.Save(mem, fmt);
            mem.Flush();
            return mem.ToArray();
        }
        /// <summary>
        /// byte数组 转换 图片
        /// </summary>
        /// <param name="bytes"></param>
        /// <returns></returns>
        public static Image image_Byte2Image(byte[] bytes)
        {
            MemoryStream mem = new MemoryStream(bytes, true);
            mem.Read(bytes, 0, bytes.Length);
            mem.Flush();
            Image aa = Image.FromStream(mem);
            return aa;
        }
               
        /// <summary>
        /// ip 转换 长整形
        /// </summary>
        /// <param name="strIP"></param>
        /// <returns></returns>
        public static long IP2Long(string strIP)
        {

            long[] ip = new long[4];

            string[] s = strIP.Split('.');
            ip[0] = long.Parse(s[0]);
            ip[1] = long.Parse(s[1]);
            ip[2] = long.Parse(s[2]);
            ip[3] = long.Parse(s[3]);

            return (ip[0] << 24) + (ip[1] << 16) + (ip[2] << 8) + ip[3];
        }

        /// <summary>
        /// 长整形 转换 IP
        /// </summary>
        /// <param name="longIP"></param>
        /// <returns></returns>
        public static string Long2IP(long longIP)
        {

            StringBuilder sb = new StringBuilder("");
            sb.Append(longIP >> 24);
            sb.Append(".");

            //将高8位置0，然后右移16为

            sb.Append((longIP & 0x00FFFFFF) >> 16);
            sb.Append(".");

            sb.Append((longIP & 0x0000FFFF) >> 8);
            sb.Append(".");

            sb.Append((longIP & 0x000000FF));

            return sb.ToString();
        }

        /// <summary>
        /// 将8位日期型整型数据转换为日期字符串数据
        /// </summary>
        /// <param name="date">整型日期</param>
        /// <param name="chnType">是否以中文年月日输出</param>
        /// <returns></returns>
        public static string FormatDate(int date, bool chnType)
        {
            string dateStr = date.ToString();

            if (date <= 0 || dateStr.Length != 8)
                return dateStr;

            if (chnType)
                return dateStr.Substring(0, 4) + "年" + dateStr.Substring(4, 2) + "月" + dateStr.Substring(6) + "日";

            return dateStr.Substring(0, 4) + "-" + dateStr.Substring(4, 2) + "-" + dateStr.Substring(6);
        }

        /// <summary>
        /// string型转换为bool型
        /// </summary>
        /// <param name="strValue">要转换的字符串</param>
        /// <param name="defValue">缺省值</param>
        /// <returns>转换后的bool类型结果</returns>
        public static bool StrToBool(object expression, bool defValue)
        {
            if (expression != null)
                return StrToBool(expression, defValue);

            return defValue;
        }

        /// <summary>
        /// string型转换为bool型
        /// </summary>
        /// <param name="strValue">要转换的字符串</param>
        /// <param name="defValue">缺省值</param>
        /// <returns>转换后的bool类型结果</returns>
        public static bool StrToBool(string expression, bool defValue)
        {
            if (expression != null)
            {
                if (string.Compare(expression, "true", true) == 0)
                    return true;
                else if (string.Compare(expression, "false", true) == 0)
                    return false;
            }
            return defValue;
        }
 /// <summary>
        /// 将对象转换为Int32类型
        /// </summary>
        /// <param name="strValue">要转换的字符串</param>
        /// <param name="defValue">缺省值</param>
        /// <returns>转换后的int类型结果</returns>
        public static int ObjectToInt(object expression)
        {
            return ObjectToInt(expression, 0);
        }

        /// <summary>
        /// 将对象转换为Int32类型
        /// </summary>
        /// <param name="strValue">要转换的字符串</param>
        /// <param name="defValue">缺省值</param>
        /// <returns>转换后的int类型结果</returns>
        public static int ObjectToInt(object expression, int defValue)
        {
            if (expression != null)
                return StrToInt(expression.ToString(), defValue);

            return defValue;
        }

        /// <summary>
        /// 将对象转换为Int32类型,转换失败返回0
        /// </summary>
        /// <param name="str">要转换的字符串</param>
        /// <returns>转换后的int类型结果</returns>
        public static int StrToInt(string str)
        {
            return StrToInt(str, 0);
        }

        /// <summary>
        /// 将对象转换为Int32类型
        /// </summary>
        /// <param name="str">要转换的字符串</param>
        /// <param name="defValue">缺省值</param>
        /// <returns>转换后的int类型结果</returns>
        public static int StrToInt(string str, int defValue)
        {
            if (string.IsNullOrEmpty(str) || str.Trim().Length >= 11 || !Regex.IsMatch(str.Trim(), @"^([-]|[0-9])[0-9]*(/./w*)?$"))
                return defValue;

            int rv;
            if (Int32.TryParse(str, out rv))
                return rv;

            return Convert.ToInt32(StrToFloat(str, defValue));
        }

        /// <summary>
        /// string型转换为float型
        /// </summary>
        /// <param name="strValue">要转换的字符串</param>
        /// <param name="defValue">缺省值</param>
        /// <returns>转换后的int类型结果</returns>
        public static float StrToFloat(object strValue, float defValue)
        {
            if ((strValue == null))
                return defValue;

            return StrToFloat(strValue.ToString(), defValue);
        }

        /// <summary>
        /// string型转换为float型
        /// </summary>
        /// <param name="strValue">要转换的字符串</param>
        /// <param name="defValue">缺省值</param>
        /// <returns>转换后的int类型结果</returns>
        public static float ObjectToFloat(object strValue, float defValue)
        {
            if ((strValue == null))
                return defValue;

            return StrToFloat(strValue.ToString(), defValue);
        }

        /// <summary>
        /// string型转换为float型
        /// </summary>
        /// <param name="strValue">要转换的字符串</param>
        /// <param name="defValue">缺省值</param>
        /// <returns>转换后的int类型结果</returns>
        public static float ObjectToFloat(object strValue)
        {
            return ObjectToFloat(strValue.ToString(), 0);
        }

        /// <summary>
        /// string型转换为float型
        /// </summary>
        /// <param name="strValue">要转换的字符串</param>
        /// <returns>转换后的int类型结果</returns>
        public static float StrToFloat(string strValue)
        {
            if ((strValue == null))
                return 0;

            return StrToFloat(strValue.ToString(), 0);
        }

        /// <summary>
        /// string型转换为float型
        /// </summary>
        /// <param name="strValue">要转换的字符串</param>
        /// <param name="defValue">缺省值</param>
        /// <returns>转换后的int类型结果</returns>
        public static float StrToFloat(string strValue, float defValue)
        {
            if ((strValue == null) || (strValue.Length > 10))
                return defValue;

            float intValue = defValue;
            if (strValue != null)
            {
                bool IsFloat = Regex.IsMatch(strValue, @"^([-]|[0-9])[0-9]*(/./w*)?$");
                if (IsFloat)
                    float.TryParse(strValue, out intValue);
            }
            return intValue;
        }

        /// <summary>
        /// 将对象转换为日期时间类型
        /// </summary>
        /// <param name="str">要转换的字符串</param>
        /// <param name="defValue">缺省值</param>
        /// <returns>转换后的int类型结果</returns>
        public static DateTime StrToDateTime(string str, DateTime defValue)
        {
            if (!string.IsNullOrEmpty(str))
            {
                DateTime dateTime;
                if (DateTime.TryParse(str, out dateTime))
                    return dateTime;
            }
            return defValue;
        }

        /// <summary>
        /// 将对象转换为日期时间类型
        /// </summary>
        /// <param name="str">要转换的字符串</param>
        /// <returns>转换后的int类型结果</returns>
        public static DateTime StrToDateTime(string str)
        {
            return StrToDateTime(str, DateTime.Now);
        }

        /// <summary>
        /// 将对象转换为日期时间类型
        /// </summary>
        /// <param name="obj">要转换的对象</param>
        /// <returns>转换后的int类型结果</returns>
        public static DateTime ObjectToDateTime(object obj)
        {
            return StrToDateTime(obj.ToString());
        }

        /// <summary>
        /// 将对象转换为日期时间类型
        /// </summary>
        /// <param name="obj">要转换的对象</param>
        /// <param name="defValue">缺省值</param>
        /// <returns>转换后的int类型结果</returns>
        public static DateTime ObjectToDateTime(object obj, DateTime defValue)
        {
            return StrToDateTime(obj.ToString(), defValue);
        }

        /// <summary>
        /// 替换回车换行符为html换行符
        /// </summary>
        public static string StrFormat(string str)
        {
            string str2;

            if (str == null)
            {
                str2 = "";
            }
            else
            {
                str = str.Replace("/r/n", "<br />");
                str = str.Replace("/n", "<br />");
                str2 = str;
            }
            return str2;
        }

        /// <summary>
        /// 转换为简体中文
        /// </summary>
        public static string ToSChinese(string str)
        {
            return Strings.StrConv(str, VbStrConv.SimplifiedChinese, 0);
           
        }

        /// <summary>
        /// 转换为繁体中文
        /// </summary>
        public static string ToTChinese(string str)
        {
            return Strings.StrConv(str, VbStrConv.TraditionalChinese, 0);
           
        }

        /// <summary>
        /// 清除字符串数组中的重复项
        /// </summary>
        /// <param name="strArray">字符串数组</param>
        /// <param name="maxElementLength">字符串数组中单个元素的最大长度</param>
        /// <returns></returns>
        public static string[] DistinctStringArray(string[] strArray, int maxElementLength)
        {
            Hashtable h = new Hashtable();

            foreach (string s in strArray)
            {
                string k = s;
                if (maxElementLength > 0 && k.Length > maxElementLength)
                {
                    k = k.Substring(0, maxElementLength);
                }
                h[k.Trim()] = s;
            }

            string[] result = new string[h.Count];

            h.Keys.CopyTo(result, 0);

            return result;
        }

        /// <summary>
        /// 清除字符串数组中的重复项
        /// </summary>
        /// <param name="strArray">字符串数组</param>
        /// <returns></returns>
        public static string[] DistinctStringArray(string[] strArray)
        {
            return DistinctStringArray(strArray, 0);
        }
//加密解密
    public class GF_Encrypt
    {
        /// <summary>
        /// DES加密
        /// </summary>
        /// <param name="pToEncrypt">加密字符串</param>
        /// <param name="sKey">密钥</param>
        /// <returns></returns>
        public static string string_Encrypt(string pToEncrypt, string sKey)
        {
            if (pToEncrypt == "") return "";
            if (sKey.Length < 8) sKey = sKey + "xuE29xWp";
            if (sKey.Length > 8) sKey = sKey.Substring(0, 8);
            DESCryptoServiceProvider des = new DESCryptoServiceProvider();
            //把字符串放到byte数组中 
            //原来使用的UTF8编码，我改成Unicode编码了，不行 
            byte[] inputByteArray = Encoding.Default.GetBytes(pToEncrypt);
            //建立加密对象的密钥和偏移量 
            //原文使用ASCIIEncoding.ASCII方法的GetBytes方法 
            //使得输入密码必须输入英文文本 
            des.Key = ASCIIEncoding.Default.GetBytes(sKey);
            des.IV = ASCIIEncoding.Default.GetBytes(sKey);
            MemoryStream ms = new MemoryStream();
            CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
            //Write  the  byte  array  into  the  crypto  stream 
            //(It  will  end  up  in  the  memory  stream) 
            cs.Write(inputByteArray, 0, inputByteArray.Length);
            cs.FlushFinalBlock();
            //Get  the  data  back  from  the  memory  stream,  and  into  a  string 
            StringBuilder ret = new StringBuilder();
            foreach (byte b in ms.ToArray())
            {
                //Format  as  hex 
                ret.AppendFormat("{0:X2}", b);
            }
            ret.ToString();
            return ret.ToString();
        }

        /// <summary>
        /// DES解密
        /// </summary>
        /// <param name="pToDecrypt">解密字符串</param>
        /// <param name="sKey">解密密钥</param>
        /// <param name="outstr">返回值</param>
        /// <returns></returns>
        public static bool string_Decrypt(string pToDecrypt, string sKey, out string outstr)
        {
            if (pToDecrypt == "")
            {
                outstr = "";
                return true;
            };
            if (sKey.Length < 8) sKey = sKey + "xuE29xWp";
            if (sKey.Length > 8) sKey = sKey.Substring(0, 8);
            try
            {
                DESCryptoServiceProvider des = new DESCryptoServiceProvider();
                //Put  the  input  string  into  the  byte  array 
                byte[] inputByteArray = new byte[pToDecrypt.Length / 2];
                for (int x = 0; x < pToDecrypt.Length / 2; x++)
                {
                    int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16));
                    inputByteArray[x] = (byte)i;
                }
                //建立加密对象的密钥和偏移量，此值重要，不能修改 
                des.Key = ASCIIEncoding.Default.GetBytes(sKey);
                des.IV = ASCIIEncoding.Default.GetBytes(sKey);
                MemoryStream ms = new MemoryStream();
                CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
                //Flush  the  data  through  the  crypto  stream  into  the  memory  stream 
                cs.Write(inputByteArray, 0, inputByteArray.Length);
                cs.FlushFinalBlock();
                //Get  the  decrypted  data  back  from  the  memory  stream 
                //建立StringBuild对象，CreateDecrypt使用的是流对象，必须把解密后的文本变成流对象 
                StringBuilder ret = new StringBuilder();
                outstr = System.Text.Encoding.Default.GetString(ms.ToArray());
                return true;
            }
            catch
            {
                outstr = "";
                return false;
            }
        }

        /// <summary>
        /// 加密
        /// </summary>
        public class AES
        {
            //默认密钥向量
            private static byte[] Keys = { 0x41, 0x72, 0x65, 0x79, 0x6F, 0x75, 0x6D, 0x79, 0x53, 0x6E, 0x6F, 0x77, 0x6D, 0x61, 0x6E, 0x3F };

            public static string Encode(string encryptString, string encryptKey)
            {
                encryptKey = GF_GET.GetSubString(encryptKey, 32, "");
                encryptKey = encryptKey.PadRight(32, ' ');

                RijndaelManaged rijndaelProvider = new RijndaelManaged();
                rijndaelProvider.Key = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 32));
                rijndaelProvider.IV = Keys;
                ICryptoTransform rijndaelEncrypt = rijndaelProvider.CreateEncryptor();

                byte[] inputData = Encoding.UTF8.GetBytes(encryptString);
                byte[] encryptedData = rijndaelEncrypt.TransformFinalBlock(inputData, 0, inputData.Length);

                return Convert.ToBase64String(encryptedData);
            }

            public static string Decode(string decryptString, string decryptKey)
            {
                try
                {
                    decryptKey = GF_GET.GetSubString(decryptKey, 32, "");
                    decryptKey = decryptKey.PadRight(32, ' ');

                    RijndaelManaged rijndaelProvider = new RijndaelManaged();
                    rijndaelProvider.Key = Encoding.UTF8.GetBytes(decryptKey);
                    rijndaelProvider.IV = Keys;
                    ICryptoTransform rijndaelDecrypt = rijndaelProvider.CreateDecryptor();

                    byte[] inputData = Convert.FromBase64String(decryptString);
                    byte[] decryptedData = rijndaelDecrypt.TransformFinalBlock(inputData, 0, inputData.Length);

                    return Encoding.UTF8.GetString(decryptedData);
                }
                catch
                {
                    return "";
                }

            }

        }

        /// <summary>
        /// 加密
        /// </summary>
        public class DES
        {
            //默认密钥向量
            private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };

            /// <summary>
            /// DES加密字符串
            /// </summary>
            /// <param name="encryptString">待加密的字符串</param>
            /// <param name="encryptKey">加密密钥,要求为8位</param>
            /// <returns>加密成功返回加密后的字符串,失败返回源串</returns>
            public static string Encode(string encryptString, string encryptKey)
            {
                encryptKey = GF_GET.GetSubString(encryptKey, 8, "");
                encryptKey = encryptKey.PadRight(8, ' ');
                byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
                byte[] rgbIV = Keys;
                byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
                DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();
                MemoryStream mStream = new MemoryStream();
                CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
                cStream.Write(inputByteArray, 0, inputByteArray.Length);
                cStream.FlushFinalBlock();
                return Convert.ToBase64String(mStream.ToArray());

            }

            /// <summary>
            /// DES解密字符串
            /// </summary>
            /// <param name="decryptString">待解密的字符串</param>
            /// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param>
            /// <returns>解密成功返回解密后的字符串,失败返源串</returns>
            public static string Decode(string decryptString, string decryptKey)
            {
                try
                {
                    decryptKey = GF_GET.GetSubString(decryptKey, 8, "");
                    decryptKey = decryptKey.PadRight(8, ' ');
                    byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey);
                    byte[] rgbIV = Keys;
                    byte[] inputByteArray = Convert.FromBase64String(decryptString);
                    DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();

                    MemoryStream mStream = new MemoryStream();
                    CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
                    cStream.Write(inputByteArray, 0, inputByteArray.Length);
                    cStream.FlushFinalBlock();
                    return Encoding.UTF8.GetString(mStream.ToArray());
                }
                catch
                {
                    return "";
                }
            }
        }

        /// <summary>
        /// MD5函数
        /// </summary>
        /// <param name="str">原始字符串</param>
        /// <returns>MD5结果</returns>
        public static string MD5(string str)
        {
            byte[] b = Encoding.UTF8.GetBytes(str);
            b = new MD5CryptoServiceProvider().ComputeHash(b);
            string ret = "";
            for (int i = 0; i < b.Length; i++)
                ret += b[i].ToString("x").PadLeft(2, '0');

            return ret;
        }

        /// <summary>
        /// SHA256函数
        /// </summary>
        /// /// <param name="str">原始字符串</param>
        /// <returns>SHA256结果</returns>
        public static string SHA256(string str)
        {
            byte[] SHA256Data = Encoding.UTF8.GetBytes(str);
            SHA256Managed Sha256 = new SHA256Managed();
            byte[] Result = Sha256.ComputeHash(SHA256Data);
            return Convert.ToBase64String(Result);  //返回长度为44字节的字符串
        }
    }
//读写INI
    public class GF_INI
    {
        [DllImport("kernel32")]
        private static extern long WritePrivateProfileString(string section, string key, string val, string filePath);
        [DllImport("kernel32")]
        private static extern int GetPrivateProfileString(string section, string key, string def, StringBuilder retVal, int size, string filePath);
        [DllImport("kernel32.dll")]
        public static extern int Beep(int dwFreq, int dwDuration);

        //读ini
        public static void iniFile_SetVal(string in_filename, string Section, string Key, string Value)
        {
            WritePrivateProfileString(Section, Key, Value, in_filename);
        }

        //写INI
        public static string iniFile_GetVal(string in_filename, string Section, string Key)
        {
            StringBuilder temp = new StringBuilder(255);
            int i = GetPrivateProfileString(Section, Key, "", temp, 255, in_filename);
            if (i == 0)
                return "";
            else
                return temp.ToString();
        }
    }
//硬件信息
    public class GF_Hardware
    {
        /// <summary>
        /// cpu序列号
        /// </summary>
        /// <returns></returns>
        public static string getID_CpuId()
        {
            string cpuInfo = "";//cpu序列号
            ManagementClass cimobject = new ManagementClass("Win32_Processor");
            ManagementObjectCollection moc = cimobject.GetInstances();
            foreach (ManagementObject mo in moc)
            {
                cpuInfo = mo.Properties["ProcessorId"].Value.ToString();
            }
            return cpuInfo;
        }

        /// <summary>
        /// 硬盘ID号
        /// </summary>
        /// <returns></returns>
        public static string getID_HardDiskId()
        {
            string HDid = "";
            ManagementClass cimobject = new ManagementClass("Win32_DiskDrive");
            ManagementObjectCollection moc = cimobject.GetInstances();
            foreach (ManagementObject mo in moc)
            {
                HDid = (string)mo.Properties["Model"].Value;
            }
            return HDid;
        }

        /// <summary>
        /// 获取网卡MacAddress
        /// </summary>
        /// <returns></returns>
        public static string getID_NetCardId()
        {
            string NCid = "";
            ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
            ManagementObjectCollection moc = mc.GetInstances();
            foreach (ManagementObject mo in moc)
            {
                if ((bool)mo["IPEnabled"] == true)
                    NCid = mo["MacAddress"].ToString();
                mo.Dispose();
            }
            return NCid;
        }

       
    }
//网络部分
    public class GF_Network
    {
        /*
         * C#完整的通信代码（点对点，点对多，同步，异步，UDP，TCP）  
         * http://topic.csdn.net/u/20080619/08/dcef3fe2-f95b-4918-8edb-36d48a3d0528_2.html
         *
         */

        /// <summary>
        /// 获取IP地址 返回第一个
        /// </summary>
        /// <returns></returns>
        public static string getIP_This()
        {
            IPHostEntry hostInfo = Dns.GetHostEntry(Dns.GetHostName());
            IPAddress[] address = hostInfo.AddressList;
            if (address.Length == 0)
                return "";
            else
                return address[0].ToString();
        }

        /// <summary>
        /// ping IP地址 timeout 局域网用200,广域网用2000
        /// </summary>
        /// <param name="ip">IP地址</param>
        /// <param name="timeout">超时 毫秒</param>
        /// <returns></returns>
        public static bool ping(string ip, int timeout)
        {           
            IPAddress ipadd;
            if (!IPAddress.TryParse(ip, out ipadd))
            {
                return false;  
            }
            Ping pingSender = new Ping();
            PingReply reply = pingSender.Send(ip, timeout, new Byte[] { Convert.ToByte(1) });
            if (reply.Status == IPStatus.Success)
                return true;
            else
                return false;
        }
        /// <summary>
        /// 判读是否是IP地址
        /// </summary>
        /// <param name="in_str"></param>
        /// <returns></returns>
        public static bool IsIPStr(string in_str)
        {
            if (in_str.Replace(".", "").Length != in_str.Length - 3)
                return false;
            try
            {
                IPAddress ip = IPAddress.Parse(in_str);
                return true;
            }
            catch
            {
                return false;
            }
        }

 
    }
//文件操作
    public class GF_File
    {

        /// <summary>
        /// 写日志文件
        /// </summary>
        /// <param name="sPath">    年月  例  2011-04</param>
        /// <param name="sFileName">月日  例  04-22</param>
        /// <param name="content">时间+  内容</param>
        /// <returns></returns>
        public static bool WriteLog(string sPath, string sFileName, string content)
        {
            try
            {

              
                StreamWriter sr;
                if (!Directory.Exists(sPath))
                {
                    Directory.CreateDirectory(sPath);
                }
                string v_filename = sPath+"//"+ sFileName;

                if (!File.Exists(v_filename)) //如果文件存在,则创建File.AppendText对象
                {
                    sr = File.CreateText(v_filename);
                    sr.Close();
                }
                using (FileStream fs = new FileStream(v_filename, System.IO.FileMode.Append, System.IO.FileAccess.Write, System.IO.FileShare.Write))
                {
                    using (sr = new StreamWriter(fs))
                    {
                       
                        sr.WriteLine(DateTime.Now.ToString("hh:mm:ss")+"     "+ content);
                        sr.Close();
                    }
                    fs.Close();
                }
                return true;

            }
            catch { return false; }
        }

        /// <summary>
        /// 读取文本文件内容,每行存入arrayList 并返回arrayList对象
        /// </summary>
        /// <param name="sFileName"></param>
        /// <returns>arrayList</returns>
        public static ArrayList ReadFileRow(string sFileName)
        {
            string sLine = "";
            ArrayList alTxt = null;
            try
            {
                using (StreamReader sr = new StreamReader(sFileName))
                {
                    alTxt = new ArrayList();

                    while (!sr.EndOfStream)
                    {
                        sLine = sr.ReadLine();
                        if (sLine != "")
                        {
                            alTxt.Add(sLine.Trim());
                        }

                    }
                    sr.Close();
                }
            }
            catch
            {

            }
            return alTxt;
        }

        /// <summary>
        /// 备份文件
        /// </summary>
        /// <param name="sourceFileName">源文件名</param>
        /// <param name="destFileName">目标文件名</param>
        /// <param name="overwrite">当目标文件存在时是否覆盖</param>
        /// <returns>操作是否成功</returns>
        public static bool BackupFile(string sourceFileName, string destFileName, bool overwrite)
        {
            if (!System.IO.File.Exists(sourceFileName))
                throw new FileNotFoundException(sourceFileName + "文件不存在！");

            if (!overwrite && System.IO.File.Exists(destFileName))
                return false;

            try
            {
                System.IO.File.Copy(sourceFileName, destFileName, true);
                return true;
            }
            catch (Exception e)
            {
                throw e;
            }
        }

        /// <summary>
        /// 备份文件,当目标文件存在时覆盖
        /// </summary>
        /// <param name="sourceFileName">源文件名</param>
        /// <param name="destFileName">目标文件名</param>
        /// <returns>操作是否成功</returns>
        public static bool BackupFile(string sourceFileName, string destFileName)
        {
            return BackupFile(sourceFileName, destFileName, true);
        }

        /// <summary>
        /// 恢复文件
        /// </summary>
        /// <param name="backupFileName">备份文件名</param>
        /// <param name="targetFileName">要恢复的文件名</param>
        /// <param name="backupTargetFileName">要恢复文件再次备份的名称,如果为null,则不再备份恢复文件</param>
        /// <returns>操作是否成功</returns>
        public static bool RestoreFile(string backupFileName, string targetFileName, string backupTargetFileName)
        {
            try
            {
                if (!System.IO.File.Exists(backupFileName))
                    throw new FileNotFoundException(backupFileName + "文件不存在！");

                if (backupTargetFileName != null)
                {
                    if (!System.IO.File.Exists(targetFileName))
                        throw new FileNotFoundException(targetFileName + "文件不存在！无法备份此文件！");
                    else
                        System.IO.File.Copy(targetFileName, backupTargetFileName, true);
                }
                System.IO.File.Delete(targetFileName);
                System.IO.File.Copy(backupFileName, targetFileName);
            }
            catch (Exception e)
            {
                throw e;
            }
            return true;
        }

        public static bool RestoreFile(string backupFileName, string targetFileName)
        {
            return RestoreFile(backupFileName, targetFileName, null);
        }
    }
//获取部分
    public class GF_GET
    {
        /// <summary>
        /// 根据坐标点获取屏幕图像
        /// </summary>
        /// <param name="x1">左上角横坐标</param>
        /// <param name="y1">左上角纵坐标</param>
        /// <param name="x2">右下角横坐标</param>
        /// <param name="y2">右下角纵坐标</param>
        /// <returns></returns>
        public static Image GetScreen(int x1, int y1, int x2, int y2)
        {
            int w = (x2 - x1);
            int h = (y2 - y1);
            Image myImage = new Bitmap(w, h);
            Graphics g = Graphics.FromImage(myImage);
            g.CopyFromScreen(new Point(x1, y1), new Point(0, 0), new Size(w, h));
            IntPtr dc1 = g.GetHdc();
            g.ReleaseHdc(dc1);
            return myImage;
        }

        /// <summary>
        /// 获取指定文件的扩展名 例:  .txt
        /// </summary>
        /// <param name="fileName">指定文件名</param>
        /// <returns>扩展名</returns>
        public static string GetFileExtName(string fileName)
        {
            if (GF_IsOk.IsStrNullOrEmpty(fileName) || fileName.IndexOf('.') <= 0)
                return "";
           
            fileName = fileName.ToLower().Trim();      

           
            return fileName.Substring(fileName.LastIndexOf('.'), fileName.Length - fileName.LastIndexOf('.'));
        }

        public static string GetSubString(string p_SrcString, int p_Length, string p_TailString)
        {
            return GetSubString(p_SrcString, 0, p_Length, p_TailString);
        }

        public static string GetUnicodeSubString(string str, int len, string p_TailString)
        {
            string result = string.Empty;// 最终返回的结果
            int byteLen = System.Text.Encoding.Default.GetByteCount(str);// 单字节字符长度
            int charLen = str.Length;// 把字符平等对待时的字符串长度
            int byteCount = 0;// 记录读取进度
            int pos = 0;// 记录截取位置
            if (byteLen > len)
            {
                for (int i = 0; i < charLen; i++)
                {
                    if (Convert.ToInt32(str.ToCharArray()[i]) > 255)// 按中文字符计算加2
                        byteCount += 2;
                    else// 按英文字符计算加1
                        byteCount += 1;
                    if (byteCount > len)// 超出时只记下上一个有效位置
                    {
                        pos = i;
                        break;
                    }
                    else if (byteCount == len)// 记下当前位置
                    {
                        pos = i + 1;
                        break;
                    }
                }

                if (pos >= 0)
                    result = str.Substring(0, pos) + p_TailString;
            }
            else
                result = str;

            return result;
        }

        /// <summary>
        /// 取指定长度的字符串
        /// </summary>
        /// <param name="p_SrcString">要检查的字符串</param>
        /// <param name="p_StartIndex">起始位置</param>
        /// <param name="p_Length">指定长度</param>
        /// <param name="p_TailString">用于替换的字符串</param>
        /// <returns>截取后的字符串</returns>
        public static string GetSubString(string p_SrcString, int p_StartIndex, int p_Length, string p_TailString)
        {
            string myResult = p_SrcString;

            Byte[] bComments = Encoding.UTF8.GetBytes(p_SrcString);
            foreach (char c in Encoding.UTF8.GetChars(bComments))
            {    //当是日文或韩文时(注:中文的范围:/u4e00 - /u9fa5, 日文在/u0800 - /u4e00, 韩文为/xAC00-/xD7A3)
                if ((c > '/u0800' && c < '/u4e00') || (c > '/xAC00' && c < '/xD7A3'))
                {
                    //if (System.Text.RegularExpressions.Regex.IsMatch(p_SrcString, "[/u0800-/u4e00]+") || System.Text.RegularExpressions.Regex.IsMatch(p_SrcString, "[/xAC00-/xD7A3]+"))
                    //当截取的起始位置超出字段串长度时
                    if (p_StartIndex >= p_SrcString.Length)
                        return "";
                    else
                        return p_SrcString.Substring(p_StartIndex,
                                                       ((p_Length + p_StartIndex) > p_SrcString.Length) ? (p_SrcString.Length - p_StartIndex) : p_Length);
                }
            }

            if (p_Length >= 0)
            {
                byte[] bsSrcString = Encoding.Default.GetBytes(p_SrcString);

                //当字符串长度大于起始位置
                if (bsSrcString.Length > p_StartIndex)
                {
                    int p_EndIndex = bsSrcString.Length;

                    //当要截取的长度在字符串的有效长度范围内
                    if (bsSrcString.Length > (p_StartIndex + p_Length))
                    {
                        p_EndIndex = p_Length + p_StartIndex;
                    }
                    else
                    {   //当不在有效范围内时,只取到字符串的结尾

                        p_Length = bsSrcString.Length - p_StartIndex;
                        p_TailString = "";
                    }

                    int nRealLength = p_Length;
                    int[] anResultFlag = new int[p_Length];
                    byte[] bsResult = null;

                    int nFlag = 0;
                    for (int i = p_StartIndex; i < p_EndIndex; i++)
                    {
                        if (bsSrcString[i] > 127)
                        {
                            nFlag++;
                            if (nFlag == 3)
                                nFlag = 1;
                        }
                        else
                            nFlag = 0;

                        anResultFlag[i] = nFlag;
                    }

                    if ((bsSrcString[p_EndIndex - 1] > 127) && (anResultFlag[p_Length - 1] == 1))
                        nRealLength = p_Length + 1;

                    bsResult = new byte[nRealLength];

                    Array.Copy(bsSrcString, p_StartIndex, bsResult, 0, nRealLength);

                    myResult = Encoding.Default.GetString(bsResult);
                    myResult = myResult + p_TailString;
                }
            }

            return myResult;
        }

        /// <summary>
        /// 获取Email HostName 例 [e-mail]   获取出来时@gmail.com
        /// </summary>
        /// <param name="strEmail"></param>
        /// <returns></returns>
        public static string GetEmailHostName(string strEmail)
        {
            if (strEmail.IndexOf("@") < 0)
            {
                return "";
            }
            return strEmail.Substring(strEmail.LastIndexOf("@")).ToLower();
        }

        /// <summary>
        /// 返回URL中结尾的文件名
        /// </summary>       
        public static string GetFilename(string url)
        {
            if (url == null)
            {
                return "";
            }
            string[] strs1 = url.Split(new char[] { '/' });
            return strs1[strs1.Length - 1].Split(new char[] { '?' })[0];
        }

        /// <summary>
        /// 根据阿拉伯数字返回月份的名称(可更改为某种语言)
        /// </summary>   
        public static string[] Monthes
        {
            get
            {
                return new string[] { "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" };
            }
        }
//判断部分
    public class GF_IsOk
    {
        /// <summary>
        /// 判读是否是IP地址
        /// </summary>
        /// <param name="in_str"></param>
        /// <returns></returns>
        public static bool IsIPStr(string  in_str)
        {
            IPAddress ip;
            return IPAddress.TryParse(in_str, out ip);
        }

        /// <summary>
        /// 判断是否是数字
        /// </summary>
        /// <param name="strNumber"></param>
        /// <returns></returns>
        public static bool IsNumber(string strNumber)
        {

            Regex objNotNumberPattern = new Regex("[^0-9.-]");
            Regex objTwoDotPattern = new Regex("[0-9]*[.][0-9]*[.][0-9]*");
            Regex objTwoMinusPattern = new Regex("[0-9]*[-][0-9]*[-][0-9]*");
            String strValidRealPattern = "^([-]|[.]|[-.]|[0-9])[0-9]*[.]*[0-9]+$";
            String strValidIntegerPattern = "^([-]|[0-9])[0-9]*$";
            Regex objNumberPattern = new Regex("(" + strValidRealPattern + ")|(" + strValidIntegerPattern + ")");
            return !objNotNumberPattern.IsMatch(strNumber) &&
                   !objTwoDotPattern.IsMatch(strNumber) &&
                   !objTwoMinusPattern.IsMatch(strNumber) &&
                   objNumberPattern.IsMatch(strNumber);
        }
      
        /// <summary>
        ///  判断是否是日期字符串
        /// </summary>
        /// <param name="in_str"></param>
        /// <returns></returns>
        public static bool IsDateStr_yyyymmdd(string in_str)
        {
            if (in_str == "") return true;
            if (in_str.Length != 8) return false;
            return IsDateStr(in_str);
        }

        /// <summary>
        /// 判断是否是日期字符串
        /// </summary>
        /// <param name="in_str"></param>
        /// <returns></returns>
        public static bool IsDateStr(string in_str)
        {
            if (in_str == "") return true;
            if (in_str.Length == 8)
                in_str = in_str.Substring(0, 4) + "-" + in_str.Substring(4, 2) + "-" + in_str.Substring(6, 2);
            DateTime dtDate;
            bool bValid = true;
            try
            {
                dtDate = DateTime.Parse(in_str);
            }
            catch (FormatException)
            {
                // 如果解析方法失败则表示不是日期性数据
                bValid = false;
            }
            return bValid;
        }

        /// <summary>
        /// 判断字符串中是否包含汉字,有返回true 否则为false
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static bool IsExistHanZi(string str)
        {
            Regex reg = new Regex(@"[/u4e00-/u9fa5]");//正则表达式
            if (reg.IsMatch(str))
            {
                return true;
            }
            else
            {
                return false;
            }
        }

        /// <summary>
        /// 字段串是否为Null或为""(空)
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static bool IsStrNullOrEmpty(string str)
        {
            if (str == null || str.Trim() == string.Empty)
                return true;

            return false;
        }

        /// <summary>
        /// 返回文件是否存在
        /// </summary>
        /// <param name="filename">文件名</param>
        /// <returns>是否存在</returns>
        public static bool IsFileExists(string filename)
        {
            return System.IO.File.Exists(filename);
        }

        /// <summary>
        /// 检测是否符合email格式
        /// </summary>
        /// <param name="strEmail">要判断的email字符串</param>
        /// <returns>判断结果</returns>
        public static bool IsValidEmail(string strEmail)
        {
            return Regex.IsMatch(strEmail, @"^[/w/.]+([-]/w+)*@[A-Za-z0-9-_]+[/.][A-Za-z0-9-_]");
        }

        public static bool IsValidDoEmail(string strEmail)
        {
            return Regex.IsMatch(strEmail, @"^@((/[[0-9]{1,3}/.[0-9]{1,3}/.[0-9]{1,3}/.)|(([/w-]+/.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(/]?)$");
        }
        /// <summary>
        /// 检测是否是正确的Url
        /// </summary>
        /// <param name="strUrl">要验证的Url</param>
        /// <returns>判断结果</returns>
        public static bool IsURL(string strUrl)
        {
            return Regex.IsMatch(strUrl, @"^(http|https)/://([a-zA-Z0-9/./-]+(/:[a-zA-Z0-9/.&%/$/-]+)*@)*((25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9])/.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)/.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)/.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])|localhost|([a-zA-Z0-9/-]+/.)*[a-zA-Z0-9/-]+/.(com|edu|gov|int|mil|net|org|biz|arpa|info|name|pro|aero|coop|museum|[a-zA-Z]{1,10}))(/:[0-9]+)*(/($|[a-zA-Z0-9/./,/?/'///+&%/$#/=~_/-]+))*$");
        }

        /// <summary>
        /// 判断是否为base64字符串
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static bool IsBase64String(string str)
        {
            //A-Z, a-z, 0-9, +, /, =
            return Regex.IsMatch(str, @"[A-Za-z0-9/+///=]");
        }

        /// <summary>
        /// 检测是否有Sql危险字符
        /// </summary>
        /// <param name="str">要判断字符串</param>
        /// <returns>判断结果</returns>
        public static bool IsSafeSqlString(string str)
        {
            return !Regex.IsMatch(str, @"[-|;|,|//|/(|/)|/[|/]|/}|/{|%|@|/*|!|/']");
        }

 

 

    }

/// <summary>
        /// 获得伪静态页码显示链接
        /// </summary>
        /// <param name="curPage">当前页数</param>
        /// <param name="countPage">总页数</param>
        /// <param name="url">超级链接地址</param>
        /// <param name="extendPage">周边页码显示个数上限</param>
        /// <returns>页码html</returns>
        public static string GetStaticPageNumbers(int curPage, int countPage, string url, string expname, int extendPage)
        {
            return GetStaticPageNumbers(curPage, countPage, url, expname, extendPage, 0);
        }

        /// <summary>
        /// 获得伪静态页码显示链接
        /// </summary>
        /// <param name="curPage">当前页数</param>
        /// <param name="countPage">总页数</param>
        /// <param name="url">超级链接地址</param>
        /// <param name="extendPage">周边页码显示个数上限</param>
        /// <param name="forumrewrite">当前版块是否使用URL重写</param>
        /// <returns>页码html</returns>
        public static string GetStaticPageNumbers(int curPage, int countPage, string url, string expname, int extendPage, int forumrewrite)
        {
            int startPage = 1;
            int endPage = 1;

            string t1 = "<a href=/"" + url + "-1" + expname + "/">&laquo;</a>";
            string t2 = "<a href=/"" + url + "-" + countPage + expname + "/">&raquo;</a>";

            if (forumrewrite == 1)
            {
                t1 = "<a href=/"" + url + "/1/list" + expname + "/">&laquo;</a>";
                t2 = "<a href=/"" + url + "/" + countPage + "/list" + expname + "/">&raquo;</a>";
            }

            if (forumrewrite == 2)
            {
                t1 = "<a href=/"" + url + "//">&laquo;</a>";
                t2 = "<a href=/"" + url + "/" + countPage + "//">&raquo;</a>";
            }

            if (countPage < 1) countPage = 1;
            if (extendPage < 3) extendPage = 2;

            if (countPage > extendPage)
            {
                if (curPage - (extendPage / 2) > 0)
                {
                    if (curPage + (extendPage / 2) < countPage)
                    {
                        startPage = curPage - (extendPage / 2);
                        endPage = startPage + extendPage - 1;
                    }
                    else
                    {
                        endPage = countPage;
                        startPage = endPage - extendPage + 1;
                        t2 = "";
                    }
                }
                else
                {
                    endPage = extendPage;
                    t1 = "";
                }
            }
            else
            {
                startPage = 1;
                endPage = countPage;
                t1 = "";
                t2 = "";
            }

            StringBuilder s = new StringBuilder("");

            s.Append(t1);
            for (int i = startPage; i <= endPage; i++)
            {
                if (i == curPage)
                {
                    s.Append("<span>");
                    s.Append(i);
                    s.Append("</span>");
                }
                else
                {
                    s.Append("<a href=/"");
                    if (forumrewrite == 1)
                    {
                        s.Append(url);
                        if (i != 1)
                        {
                            s.Append("/");
                            s.Append(i);
                        }
                        s.Append("/list");
                        s.Append(expname);
                    }
                    else if (forumrewrite == 2)
                    {
                        s.Append(url);
                        s.Append("/");
                        if (i != 1)
                        {
                            s.Append(i);
                            s.Append("/");
                        }
                    }
                    else
                    {
                        s.Append(url);
                        if (i != 1)
                        {
                            s.Append("-");
                            s.Append(i);
                        }
                        s.Append(expname);
                    }
                    s.Append("/">");
                    s.Append(i);
                    s.Append("</a>");
                }
            }
            s.Append(t2);

            return s.ToString();
        }

        /// <summary>
        /// 获得帖子的伪静态页码显示链接
        /// </summary>
        /// <param name="expname"></param>
        /// <param name="countPage">总页数</param>
        /// <param name="url">超级链接地址</param>
        /// <param name="extendPage">周边页码显示个数上限</param>
        /// <returns>页码html</returns>
        public static string GetPostPageNumbers(int countPage, string url, string expname, int extendPage)
        {
            int startPage = 1;
            int endPage = 1;
            int curPage = 1;

            string t1 = "<a href=/"" + url + "-1" + expname + "/">&laquo;</a>";
            string t2 = "<a href=/"" + url + "-" + countPage + expname + "/">&raquo;</a>";

            if (countPage < 1) countPage = 1;
            if (extendPage < 3) extendPage = 2;

            if (countPage > extendPage)
            {
                if (curPage - (extendPage / 2) > 0)
                {
                    if (curPage + (extendPage / 2) < countPage)
                    {
                        startPage = curPage - (extendPage / 2);
                        endPage = startPage + extendPage - 1;
                    }
                    else
                    {
                        endPage = countPage;
                        startPage = endPage - extendPage + 1;
                        t2 = "";
                    }
                }
                else
                {
                    endPage = extendPage;
                    t1 = "";
                }
            }
            else
            {
                startPage = 1;
                endPage = countPage;
                t1 = "";
                t2 = "";
            }

            StringBuilder s = new StringBuilder("");

            s.Append(t1);
            for (int i = startPage; i <= endPage; i++)
            {
                s.Append("<a href=/"");
                s.Append(url);
                s.Append("-");
                s.Append(i);
                s.Append(expname);
                s.Append("/">");
                s.Append(i);
                s.Append("</a>");
            }
            s.Append(t2);

            return s.ToString();
        }

/// <summary>
        /// 获得页码显示链接
        /// </summary>
        /// <param name="curPage">当前页数</param>
        /// <param name="countPage">总页数</param>
        /// <param name="url">超级链接地址</param>
        /// <param name="extendPage">周边页码显示个数上限</param>
        /// <returns>页码html</returns>
        public static string GetPageNumbers(int curPage, int countPage, string url, int extendPage)
        {
            return GetPageNumbers(curPage, countPage, url, extendPage, "page");
        }

        /// <summary>
        /// 获得页码显示链接
        /// </summary>
        /// <param name="curPage">当前页数</param>
        /// <param name="countPage">总页数</param>
        /// <param name="url">超级链接地址</param>
        /// <param name="extendPage">周边页码显示个数上限</param>
        /// <param name="pagetag">页码标记</param>
        /// <returns>页码html</returns>
        public static string GetPageNumbers(int curPage, int countPage, string url, int extendPage, string pagetag)
        {
            return GetPageNumbers(curPage, countPage, url, extendPage, pagetag, null);
        }

        /// <summary>
        /// 获得页码显示链接
        /// </summary>
        /// <param name="curPage">当前页数</param>
        /// <param name="countPage">总页数</param>
        /// <param name="url">超级链接地址</param>
        /// <param name="extendPage">周边页码显示个数上限</param>
        /// <param name="pagetag">页码标记</param>
        /// <param name="anchor">锚点</param>
        /// <returns>页码html</returns>
        public static string GetPageNumbers(int curPage, int countPage, string url, int extendPage, string pagetag, string anchor)
        {
            if (pagetag == "")
                pagetag = "page";
            int startPage = 1;
            int endPage = 1;

            if (url.IndexOf("?") > 0)
                url = url + "&";
            else
                url = url + "?";

            string t1 = "<a href=/"" + url + "&" + pagetag + "=1";
            string t2 = "<a href=/"" + url + "&" + pagetag + "=" + countPage;
            if (anchor != null)
            {
                t1 += anchor;
                t2 += anchor;
            }
            t1 += "/">&laquo;</a>";
            t2 += "/">&raquo;</a>";

            if (countPage < 1)
                countPage = 1;
            if (extendPage < 3)
                extendPage = 2;

            if (countPage > extendPage)
            {
                if (curPage - (extendPage / 2) > 0)
                {
                    if (curPage + (extendPage / 2) < countPage)
                    {
                        startPage = curPage - (extendPage / 2);
                        endPage = startPage + extendPage - 1;
                    }
                    else
                    {
                        endPage = countPage;
                        startPage = endPage - extendPage + 1;
                        t2 = "";
                    }
                }
                else
                {
                    endPage = extendPage;
                    t1 = "";
                }
            }
            else
            {
                startPage = 1;
                endPage = countPage;
                t1 = "";
                t2 = "";
            }

            StringBuilder s = new StringBuilder("");

            s.Append(t1);
            for (int i = startPage; i <= endPage; i++)
            {
                if (i == curPage)
                {
                    s.Append("<span>");
                    s.Append(i);
                    s.Append("</span>");
                }
                else
                {
                    s.Append("<a href=/"");
                    s.Append(url);
                    s.Append(pagetag);
                    s.Append("=");
                    s.Append(i);
                    if (anchor != null)
                    {
                        s.Append(anchor);
                    }
                    s.Append("/">");
                    s.Append(i);
                    s.Append("</a>");
                }
            }
            s.Append(t2);

            return s.ToString();
        }

        /// <summary>
        /// 判断文件流是否为UTF8字符集
        /// </summary>
        /// <param name="sbInputStream">文件流</param>
        /// <returns>判断结果</returns>
        private static bool IsUTF8(FileStream sbInputStream)
        {
            int i;
            byte cOctets;  // octets to go in this UTF-8 encoded character
            byte chr;
            bool bAllAscii = true;
            long iLen = sbInputStream.Length;

            cOctets = 0;
            for (i = 0; i < iLen; i++)
            {
                chr = (byte)sbInputStream.ReadByte();

                if ((chr & 0x80) != 0) bAllAscii = false;

                if (cOctets == 0)
                {
                    if (chr >= 0x80)
                    {
                        do
                        {
                            chr <<= 1;
                            cOctets++;
                        }
                        while ((chr & 0x80) != 0);

                        cOctets--;
                        if (cOctets == 0)
                            return false;
                    }
                }
                else
                {
                    if ((chr & 0xC0) != 0x80)
                        return false;

                    cOctets--;
                }
            }

            if (cOctets > 0)
                return false;

            if (bAllAscii)
                return false;

            return true;
        }
//数据库
    public class GF_DA
    {
        /// <summary>
        /// 执行SQL语句 sConnStr 连接字符串,sql执行的sql命令 返回第一行第一列
        /// </summary>
        /// <param name="sConnStr"></param>
        /// <param name="sql"></param>
        /// <returns></returns>
        public static object ExecSQL(string sConnStr, string sql)
        {
            using (SqlConnection conn = new SqlConnection(sConnStr))
            {
                using (SqlCommand cmd = new SqlCommand())
                {
                    try
                    {
                        conn.Open();
                        cmd.Connection = conn;
                        cmd.CommandText = sql;
                        return cmd.ExecuteScalar();
                    }
                    catch
                    {
                        return null;
                    }
                }

            }
        }

        /// <summary>
        /// 执行SQL数组 
        /// </summary>
        /// <param name="sConnStr"></param>
        /// <param name="alSql"></param>
        /// <param name="iLen"></param>
        public static void ExecSQL(string sConnStr, ArrayList alSql, int iLen)
        {
            using (SqlConnection conn = new SqlConnection(sConnStr))
            {
                using (SqlCommand cmd = new SqlCommand())
                {
                    try
                    {
                        conn.Open();
                        cmd.Connection = conn;
                        for (int i = 0; i < alSql.Count; i++)
                        {
                            cmd.CommandText = alSql[i].ToString();
                            cmd.ExecuteNonQuery();
                           
                        }
                    }
                    catch
                    {

                    }
                }

            }
        }

        /// <summary>
        /// 填充数据 返回DataTable
        /// </summary>
        /// <param name="sConnStr"></param>
        /// <param name="sql"></param>
        /// <param name="sTableName"></param>
        /// <returns></returns>
        public static DataTable DataFill(string sConnStr, string sql, string sTableName)
        {
            using (SqlConnection conn = new SqlConnection(sConnStr))
            {
                using (SqlCommand cmd = new SqlCommand())
                {
                    DataSet ds = new DataSet();
                    try
                    {
                        conn.Open();
                        cmd.Connection = conn;
                        cmd.CommandText = sql;
                        SqlDataAdapter ap = new SqlDataAdapter(cmd);
                        ap.Fill(ds, sTableName);
                        return ds.Tables[0];
                    }
                    catch
                    {
                        return null;
                    }
                }

            }
        }
    }