实用类

来源：互联网发布：des算法举例编辑：程序博客网时间：2024/06/04 18:41
using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Security.Cryptography;using System.Text.RegularExpressions;namespace Common{    public enum LengthInfo    { less, more, success }    public static class WTBString    {        /// <summary>        /// 将字符串进行MD5加密处理        /// </summary>        /// <param name="str">要加密的字符串</param>        /// <returns>经MD5加密的字符串</returns>        public static string GetMD5String(string str)        {            MD5 md5 = new MD5CryptoServiceProvider();            byte[] data =                System.Text.Encoding.Default.GetBytes(str);            byte[] md5data = md5.ComputeHash(data);            md5.Clear();            StringBuilder builder = new StringBuilder();            for (int i = 0; i < md5data.Length - 1; i++)            {                builder.Append(md5data[i].ToString("X2"));            }            return builder.ToString();        }        /// <summary>        /// 用户名验证        /// </summary>        /// <param name="str">用户名</param>        /// <returns>bool</returns>        public static bool GetLoginId(string str)        {            return Regex.IsMatch(str, "^\\w+$");        }        /// <summary>        /// 字符长度验证        /// </summary>        /// <param name="str">被验证字符</param>        /// <param name="min">最小长度</param>        /// <param name="max">最大长度</param>        /// <returns>返回本命名空间中的枚举 LengthInfo</returns>        public static LengthInfo CheckLength(string str, int min, int max)        {            int len = str.Length;            if (len < min)                return LengthInfo.less;            if (len > max)                return LengthInfo.more;            return LengthInfo.success;        }        /// <summary>        /// 判断单个字符是否为中文        /// </summary>        /// <param name="ch"></param>        /// <returns></returns>        public static bool DoubleChar(char ch)        {            return Regex.IsMatch(ch.ToString(), "^[\\u4E00-\\u9FA5\\uF900-\\uFA2D]+$");        }        /// <summary>        /// 判断字符串是否为中文        /// </summary>        /// <param name="str"></param>        /// <returns></returns>        public static bool DobuleChar(string str)        {            return Regex.IsMatch(str, "^[\\u4E00-\\u9FA5\\uF900-\\uFA2D]+$");        }        /// <summary>        /// 中英混合时判断字符的长度        /// </summary>        /// <param name="str"></param>        /// <returns></returns>        public static int Length(string str)        {            int i = 0;            foreach (char ch in str)            {                if (DoubleChar(ch))                    i += 2;                else                    i++;            }            return i;        }        /// <summary>        /// 是否为价格（浮点型不能判断中文数字混合的        /// </summary>        /// <param name="price"></param>        /// <returns></returns>        public static bool IsPrice(string price)        {            return Regex.IsMatch(price, "^[1-9]\\d*.\\d*|0.\\d*[1-9]\\d*$");        }        /// <summary>        /// 是否为正整数        /// </summary>        /// <param name="a"></param>        /// <returns></returns>        public static bool IsZhengZNum(string a)        {            return Regex.IsMatch(a, "^[1-9]\\d*$");        }        /// <summary>        /// 是否为一个数字        /// </summary>        /// <param name="a"></param>        /// <returns></returns>        public static bool IsNum(string a)        {            return Regex.IsMatch(a, "^([+-]?)\\d*\\.?\\d+$");        }        /// <summary>        /// 验证身份证号码        /// </summary>        /// <param name="idcard"></param>        /// <returns></returns>        public static bool Idcard(string idcard)        {            return Regex.IsMatch(idcard, @"^[1-9]\d{5}[1-9]\d{3}((0\d)|(1[0-2]))(([0|1|2]\d)|3[0-1])\d{4}$");        }        /// <summary>        /// 判断字符串是否是全数字        /// </summary>        public static bool IsNums(string str)        {            return Regex.IsMatch(str, "^[0-9]+$");        }        /// <summary>        /// 判断字符串是否是邮箱格式        /// </summary>        public static bool IsEmail(string str)        {            return Regex.IsMatch(str, "^[\\w-]+@[\\w-]+\\.(com|net|cn|org|edu|mil|tv|biz|info)$");        }        /// <summary>        /// 判断字符串是否全是中文        /// </summary>        public static bool IsCHStr(string str)        {            bool result = true;            char[] chars = str.ToCharArray();            foreach (char ch in chars)            {                if (!DoubleByte(ch))                {                    result = false;                    break;                }            }            return result;        }        /// <summary>        /// 判断字符串是否是日期格式        /// </summary>        public static bool IsDate(string str)        {            try            {                Convert.ToDateTime(str);                return true;            }            catch            {                return false;            }        }        ///<summary>        ///是否是电话号码        ///</summary>        public static bool IsTel(string str)        {            return Regex.IsMatch(str, "^(([0\\+]\\d{2,3}-)?(0\\d{2,3})-)?(\\d{7,8})(-(\\d{3,}))?$");        }        ///<summary>        ///是否是邮编        ///</summary>        public static bool IsZipCode(string str)        {            return Regex.IsMatch(str, "^\\d{6}$");        }        /// <summary>        /// 手机号        /// </summary>        public static bool IsMoblie(string str)        {            return Regex.IsMatch(str, "^(13|15|18)[0-9]{9}$");        }        /// <summary>        /// qq号        /// </summary>        public static bool IsQQ(string str)        {            return Regex.IsMatch(str, "^[1-9]*[1-9][0-9]*$");        }        /// <summary>        /// 判断字符串的长度，一个中文字符长度为2        /// </summary>        public static int Len(string str)        {            char[] ch = str.ToCharArray();            int len = 0;            for (int i = 0; i < ch.Length; i++)            {                if (DoubleByte(ch[i]))                    len += 2;                else                    len++;            }            return len;        }        /// <summary>        /// 移除字符串两端的空字符，包含全角空格        /// </summary>        public static string Trim(string str)        {            str = str.Trim();            char[] ch = new char[1];            ch[0] = '　';            str = str.Trim(ch);            return str;        }        /// <summary>        /// 根据指定长度截取        /// </summary>        public static string Substring(string str, int len)        {            char[] chArray = str.ToCharArray();            int tmplen = len;            int j = 0;            for (int i = 0; i < chArray.Length; i++)            {                if (j < tmplen)                {                    if (DoubleByte(chArray[i]))                    {                        len = len - 1;                        j += 2;                    }                    else                        j++;                }                else                    break;            }            int tmpLen = str.Length;            if (len >= tmpLen)                return str;            else                return str.Substring(0, len) + "…";        }        /// <summary>        /// 获取纯文本        /// </summary>        public static string RemoveHtml(string text)        {            if (string.IsNullOrEmpty(text))                return string.Empty;            text = Regex.Replace(text, "[\\s]{2,}", " ");//two or more spaces            text = Regex.Replace(text, "(<[b|B][r|R]/*>)+|(<[p|P](.|\\n)*?>)", "\n");//<br>            text = Regex.Replace(text, "(\\s*&[n|N][b|B][s|S][p|P];\\s*)+", " ");//             text = Regex.Replace(text, "<(.|\\n)*?>", string.Empty);//any other tags            text = text.Replace("'", "''");            return text;        }        /// <summary>        /// 获取字符串中第一幅图片地址        /// </summary>        public static string GetImgUrl(string str)        {            string Pattern = @"<\s*img[^>]*src\s*=\s*(?:'|"")(?<dl>[^>]*?)(?:'|"")[^>]*/\s*>";            Match m = Regex.Match(str, Pattern);            return m.Groups["dl"].ToString();        }        /// <summary>        ///按指定模式返回指定长度的随机字符串        /// </summary>        /// <param name="len"></param>        /// <param name="mode">num:仅返回数字;letter:仅返回纯字母;both:由数字及纯字母随机组合的的字符串</param>        /// <returns></returns>        public static string GetRandomStr(int len, string mode)        {            Random ran = new Random();            int tem = 0;            int num;            string result = "";            for (int i = 0; i < len; i++)            {                num = ran.Next();                switch (mode)                {                    case "num":                        tem = num % 10 + '0';//生成数字                        break;                    case "letter":                        tem = num % 26 + 'A';//生成字母                        break;                    case "both":                        if (num % 2 == 0)                            tem = num % 10 + '0';                        else                            tem = num % 26 + 'A';                        break;                    default:                        break;                }                result += Convert.ToChar(tem).ToString();            }            return result;        }        /// <summary>        /// 判断字符是否是双字节字符        /// </summary>        private static bool DoubleByte(char ch)        {            if (Regex.IsMatch(ch.ToString(), "[^\x00-\xff]|[\u4e00-\u9fa5]"))                return true;            return false;        }    }}
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