StringUtil

来源：互联网发布：2个excel表格数据对比编辑：程序博客网时间：2024/05/21 19:27

public class StringUtil
{
private static string passWord; //加密字符串

/// <summary>
 /// 判断输入是否数字
 /// </summary>
 /// <param name="num">要判断的字符串</param>
 /// <returns></returns>
 static public bool VldInt(string num)
 {
 #region
 try
 {
 Convert.ToInt32(num);
 return true;
 }
 catch { return false; }
 #endregion
 }

/// <summary>
 /// 修改特殊字符
 /// </summary>
 /// <param name="str">要替换的字符串</param>
 /// <returns></returns>
 static public string CheckStr(string str)
 {
 #region
 return str.Replace(" \r\n", "\r\n").Replace("&", "&").Replace("'", "'").Replace(@"""", """).Replace(" ", " ").Replace("<", "<").Replace(">", ">").Replace(" ", " ").Replace(" where ", " where ").
 Replace(" select ", " select ").Replace(" insert ", " insert ").Replace(" create ", " create ").Replace(" drop ", " dro&#112 ").
 Replace(" alter ", " alter ").Replace(" delete ", " delete ").Replace(" update ", " update ").Replace(" or ", " or ").Replace("\"", @""").
 Replace("\r\n", " \r\n");
 #endregion
 }

/// <summary>
 /// 恢复特殊字符
 /// </summary>
 /// <param name="str">要替换的字符串</param>
 /// <returns></returns>
 static public string UnCheckStr(string str)
 {
 #region
 return str.Replace("&", "&").Replace("'", "'").Replace(""", @"""").Replace(" ", " ").Replace("<", "<").Replace(">", ">").Replace(" ", " ").Replace(" where ", " where ").
 Replace(" select ", " select ").Replace(" insert ", " insert ").Replace(" create ", " create ").Replace(" dro&#112 ", " drop ").
 Replace(" alter ", " alter ").Replace(" delete ", " delete ").Replace(" update ", " update ").Replace(" or ", " or ").Replace(@""", "\"");
 #endregion
 }

/// <summary>
 /// 截取字符串函数
 /// </summary>
 /// <param name="str">所要截取的字符串</param>
 /// <param name="num">截取字符串的长度</param>
 /// <returns></returns>
 static public string GetSubString(string str, int num)
 {
 #region
 return (str.Length > num) ? str.Substring(0, num) + "..." : str;
 #endregion
 }

/// <summary>
 /// 过滤输入信息
 /// </summary>
 /// <param name="text">内容</param>
 /// <param name="maxLength">最大长度</param>
 /// <returns></returns>
 public static string InputText(string text, int maxLength)
 {
 #region
 text = text.Trim();
 if (string.IsNullOrEmpty(text))
 return string.Empty;
 if (text.Length > maxLength)
 text = text.Substring(0, maxLength);
 text = Regex.Replace(text, "[\\s]{2,}", " "); //two or more spaces
 text = Regex.Replace(text, "(<[b|B][r|R]/*>)+|(<[p|P](.|\\n)*?>)", "\n"); // 
 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;
 #endregion
 }

/// <summary>
 /// 生成随机数
 /// </summary>
 /// <returns></returns>
 static public string GenerateCheckCode()
 {
 #region
 int number;
 char code;
 string checkCode = String.Empty;

System.Random random = new Random();

for (int i = 0; i < 5; i++)
 {
 number = random.Next();

                if (number % 2 == 0)
                    code = (char)('0' + (char)(number % 10));
                else
                    code = (char)('A' + (char)(number % 26));

checkCode += code.ToString();
}

HttpContext.Current.Response.Cookies.Add(new HttpCookie("CheckCode", checkCode));

            return checkCode;
            #endregion
        }

/// <summary>
 /// 获取汉字第一个拼音
 /// </summary>
 /// <param name="input"></param>
 /// <returns></returns>
 static public string getSpells(string input)
 {
 #region
 int len = input.Length;
 string reVal = "";
 for (int i = 0; i < len; i++)
 {
 reVal += getSpell(input.Substring(i, 1));
 }
 return reVal;
 #endregion
 }

/// <summary>
 /// 汉字编码转换,解决IE地址栏中文
 /// </summary>
 /// <param name="input"></param>
 /// <returns></returns>
 static public string Strencode(string input)
 {
 #region
 return System.Web.HttpUtility.UrlEncode(InputText(input, 100));
 #endregion
 }

static public string getSpell(string cn)
 {
 #region
 byte[] arrCN = Encoding.Default.GetBytes(cn);
 if (arrCN.Length > 1)
 {
 int area = (short)arrCN[0];
 int pos = (short)arrCN[1];
 int code = (area << 8) + pos;
 int[] areacode = { 45217, 45253, 45761, 46318, 46826, 47010, 47297, 47614, 48119, 48119, 49062, 49324, 49896, 50371, 50614, 50622, 50906, 51387, 51446, 52218, 52698, 52698, 52698, 52980, 53689, 54481 };
 for (int i = 0; i < 26; i++)
 {
 int max = 55290;
 if (i != 25) max = areacode[i + 1];
 if (areacode[i] <= code && code < max)
 {
 return Encoding.Default.GetString(new byte[] { (byte)(65 + i) });
 }
 }
 return "?";
 }
 else return cn;
 #endregion
 }

/// <summary>
 /// 半角转全角
 /// </summary>
 /// <param name="BJstr"></param>
 /// <returns></returns>
 static public string GetQuanJiao(string BJstr)
 {
 #region
 char[] c = BJstr.ToCharArray();
 for (int i = 0; i < c.Length; i++)
 {
 byte[] b = System.Text.Encoding.Unicode.GetBytes(c, i, 1);
 if (b.Length == 2)
 {
 if (b[1] == 0)
 {
 b[0] = (byte)(b[0] - 32);
 b[1] = 255;
 c[i] = System.Text.Encoding.Unicode.GetChars(b)[0];
 }
 }
 }

string strNew = new string(c);
return strNew;

#endregion
}

/// <summary>
 /// 全角转半角
 /// </summary>
 /// <param name="QJstr"></param>
 /// <returns></returns>
 static public string GetBanJiao(string QJstr)
 {
 #region
 char[] c = QJstr.ToCharArray();
 for (int i = 0; i < c.Length; i++)
 {
 byte[] b = System.Text.Encoding.Unicode.GetBytes(c, i, 1);
 if (b.Length == 2)
 {
 if (b[1] == 255)
 {
 b[0] = (byte)(b[0] + 32);
 b[1] = 0;
 c[i] = System.Text.Encoding.Unicode.GetChars(b)[0];
 }
 }
 }
 string strNew = new string(c);
 return strNew;
 #endregion
 }

#region 加密的类型
 /// <summary>
 /// 加密的类型
 /// </summary>
 public enum PasswordType
 {
 SHA1,
 MD5
 }
 #endregion

/// <summary>
 /// 字符串加密
 /// </summary>
 /// <param name="PasswordString">要加密的字符串</param>
 /// <param name="PasswordFormat">要加密的类别</param>
 /// <returns></returns>
 static public string EncryptPassword(string PasswordString, string PasswordFormat)
 {
 #region
 switch (PasswordFormat)
 {
 case "SHA1":
 {
 passWord = FormsAuthentication.HashPasswordForStoringInConfigFile(PasswordString, "SHA1");
 break;
 }
 case "MD5":
 {
 passWord = FormsAuthentication.HashPasswordForStoringInConfigFile(PasswordString, "MD5");
 break;
 }
 default:
 {
 passWord = string.Empty;
 break;
 }
 }
 return passWord;
 #endregion
 }
 static public string FormartDateTime(object obj)
 {
 return ((DateTime)obj).ToString("yyyy-MM-dd");//'yyyy-mm-dd hh24:mi
 }
 static public string FormartDateTimeTwo(object obj)
 {
 return ((DateTime)obj).ToString("yyyy-mm-dd hh:m");//'
 }
 /// <summary>
 /// 说明:过滤危险字符
 /// 返回值：处理后的这符串。
 /// 参数： str原字符串。
 /// 创建日期：

/// 创建人：

/// </summary>
 static public string HtmlEncode(string str)
 {
 str = str.Replace("&", "&");
 str = str.Replace("<", "<");
 str = str.Replace(">", "&gt");
 str = str.Replace("'", "''");
 str = str.Replace("*", "");
 str = str.Replace("\n", " ");
 str = str.Replace("\r\n", " ");
 //str = str.Replace("?","");
 str = str.Replace("select", "");
 str = str.Replace("insert", "");
 str = str.Replace("update", "");
 str = str.Replace("delete", "");
 str = str.Replace("create", "");
 str = str.Replace("drop", "");
 str = str.Replace("delcare", "");
 if (str.Trim().ToString() == "") { str = "无"; }
 return str.Trim();
 }
 /// <summary>
 /// 去除HTML代码
 /// </summary>
 /// <param name="content"></param>
 /// <returns></returns>
 public static string StripHtmlXmlTags(string content)
 {
 return Regex.Replace(content, "<[^>]+>", "", RegexOptions.IgnoreCase | RegexOptions.Compiled);
 }

public static string StripAllTags(string stringToStrip)
{

stringToStrip = Regex.Replace(stringToStrip, "</p(?:\\s*)>(?:\\s*)<p(?:\\s*)>", "\n\n", RegexOptions.IgnoreCase | RegexOptions.Compiled);
 stringToStrip = Regex.Replace(stringToStrip, "<br(?:\\s*)/>", "\n", RegexOptions.IgnoreCase | RegexOptions.Compiled);
 stringToStrip = Regex.Replace(stringToStrip, "\"", "''", RegexOptions.IgnoreCase | RegexOptions.Compiled);
 stringToStrip = StripHtmlXmlTags(stringToStrip);
 return stringToStrip;

}
}