收藏博友的验证类

Posted on 2010-07-20 13:35 Sun_Blue_Sky 阅读(212) 评论(0) 编辑收藏举报

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Text;
using System.Text.RegularExpressions;

    /// <summary>
    /// RegExp Soruce:   http://regexlib.com/DisplayPatterns.aspx
     /// Author:柳永法 yongfa365 http://www.yongfa365.com/ yongfa365@qq.com
    /// Intro:验证网址，IP，邮箱，电话，手机，数字，英文，日期，身份证，邮编，
    /// 原则上是中国通用，因为各种场合不一样所以有特殊情况肯定要自己再手写，这里只能是提供一些通用的验证，追求太完美是不现实的。
    /// Version: 1.0
    /// PutTime: 2008-6-5
    /// LastModi:2008-6-5
    /// </summary>
    ///
public class Validator
{
    #region 验证邮箱
    /// <summary>
    /// 验证邮箱
    /// </summary>
    /// <param name="source"></param>
    /// <returns></returns>
    public static bool IsEmail(string source)
    {
        return Regex.IsMatch(source, @"^[A-Za-z0-9](([_\.\-]?[a-zA-Z0-9]+)*)@([A-Za-z0-9]+)(([\.\-]?[a-zA-Z0-9]+)*)\.([A-Za-z]{2,})$", RegexOptions.IgnoreCase);
    }
    public static bool HasEmail(string source)
    {
        return Regex.IsMatch(source, @"[A-Za-z0-9](([_\.\-]?[a-zA-Z0-9]+)*)@([A-Za-z0-9]+)(([\.\-]?[a-zA-Z0-9]+)*)\.([A-Za-z]{2,})", RegexOptions.IgnoreCase);
    }
    #endregion

    #region 验证网址
    /// <summary>
    /// 验证网址
    /// </summary>
    /// <param name="source"></param>
    /// <returns></returns>
    public static bool IsUrl(string source)
    {
        return Regex.IsMatch(source, @"^(((file|gopher|news|nntp|telnet|http|ftp|https|ftps|sftp)://)|(www\.))+(([a-zA-Z0-9\._-]+\.[a-zA-Z]{2,6})|([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}))(/[a-zA-Z0-9\&%_\./-~-]*)?$", RegexOptions.IgnoreCase);
    }
    public static bool HasUrl(string source)
    {
        return Regex.IsMatch(source, @"(((file|gopher|news|nntp|telnet|http|ftp|https|ftps|sftp)://)|(www\.))+(([a-zA-Z0-9\._-]+\.[a-zA-Z]{2,6})|([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}))(/[a-zA-Z0-9\&%_\./-~-]*)?", RegexOptions.IgnoreCase);
    }
    #endregion

    #region 验证日期
    /// <summary>
    /// 验证日期
    /// </summary>
    /// <param name="source"></param>
    /// <returns></returns>
    public static bool IsDateTime(string source)
    {
        try
        {
            DateTime time = Convert.ToDateTime(source);
            return true;
        }
        catch
        {
            return false;
        }
    }
    #endregion

    #region 验证手机号
    /// <summary>
    /// 验证手机号
    /// </summary>
    /// <param name="source"></param>
    /// <returns></returns>
    public static bool IsMobile(string source)
    {
        return Regex.IsMatch(source, @"^1[35]\d{9}$", RegexOptions.IgnoreCase);
    }
    public static bool HasMobile(string source)
    {
        return Regex.IsMatch(source, @"1[35]\d{9}", RegexOptions.IgnoreCase);
    }
    #endregion

    #region 验证IP
    /// <summary>
    /// 验证IP
    /// </summary>
    /// <param name="source"></param>
    /// <returns></returns>
    public static bool IsIP(string source)
    {
        return Regex.IsMatch(source, @"^(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])$", RegexOptions.IgnoreCase);
    }
    public static bool HasIP(string source)
    {
        return Regex.IsMatch(source, @"(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])", RegexOptions.IgnoreCase);
    }
    public static bool IsIp(string ip)
    {
        bool result = false;
        try
        {
            string[] iparg = ip.Split('.');
            if (string.Empty != ip && ip.Length < 16 && iparg.Length == 4)
            {
                int intip;
                for (int i = 0; i < 4; i++)
                {
                    intip = Convert.ToInt16(iparg[i]);
                    if (intip > 255)
                    {
                        result = false;
                        return result;
                    }
                }
                result = true;
            }
        }
        catch
        {
            return result;
        }
        return result;
    }
    #endregion

    #region 验证身份证是否有效
    /// <summary>
    /// 验证身份证是否有效
    /// </summary>
    /// <param name="Id"></param>
    /// <returns></returns>
    public static bool IsIDCard(string Id)
    {
        if (Id.Length == 18)
        {
            bool check = IsIDCard18(Id);
            return check;
        }
        else if (Id.Length == 15)
        {
            bool check = IsIDCard15(Id);
            return check;
        }
        else
        {
            return false;
        }
    }

    public static bool IsIDCard18(string Id)
    {
        long n = 0;
        if (long.TryParse(Id.Remove(17), out n) == false || n < Math.Pow(10, 16) || long.TryParse(Id.Replace('x', '0').Replace('X', '0'), out n) == false)
        {
            return false;//数字验证
        }
        string address = "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91";
        if (address.IndexOf(Id.Remove(2)) == -1)
        {
            return false;//省份验证
        }
        string birth = Id.Substring(6, 8).Insert(6, "-").Insert(4, "-");
        DateTime time = new DateTime();
        if (DateTime.TryParse(birth, out time) == false)
        {
            return false;//生日验证
        }
        string[] arrVarifyCode = ("1,0,x,9,8,7,6,5,4,3,2").Split(',');
        string[] Wi = ("7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2").Split(',');
        char[] Ai = Id.Remove(17).ToCharArray();
        int sum = 0;
        for (int i = 0; i < 17; i++)
        {
            sum += int.Parse(Wi[i]) * int.Parse(Ai[i].ToString());
        }
        int y = -1;
        Math.DivRem(sum, 11, out y);
        if (arrVarifyCode[y] != Id.Substring(17, 1).ToLower())
        {
            return false;//校验码验证
        }
        return true;//符合GB11643-1999标准
    }

    public static bool IsIDCard15(string Id)
    {
        long n = 0;
        if (long.TryParse(Id, out n) == false || n < Math.Pow(10, 14))
        {
            return false;//数字验证
        }
        string address = "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91";
        if (address.IndexOf(Id.Remove(2)) == -1)
        {
            return false;//省份验证
        }
        string birth = Id.Substring(6, 6).Insert(4, "-").Insert(2, "-");
        DateTime time = new DateTime();
        if (DateTime.TryParse(birth, out time) == false)
        {
            return false;//生日验证
        }
        return true;//符合15位身份证标准
    }
    #endregion

    #region 是不是Int型的
    /// <summary>
    /// 是不是Int型的
    /// </summary>
    /// <param name="source"></param>
    /// <returns></returns>
    public static bool IsInt(string source)
    {
        Regex regex = new Regex(@"^(-){0,1}\d+$");
        if (regex.Match(source).Success)
        {
            if ((long.Parse(source) > 0x7fffffffL) || (long.Parse(source) < -2147483648L))
            {
                return false;
            }
            return true;
        }
        return false;
    }
    #endregion

    #region 看字符串的长度是不是在限定数之间一个中文为两个字符
    /// <summary>
    /// 看字符串的长度是不是在限定数之间一个中文为两个字符
    /// </summary>
    /// <param name="source">字符串</param>
    /// <param name="begin">大于等于</param>
    /// <param name="end">小于等于</param>
    /// <returns></returns>
    public static bool IsLengthStr(string source, int begin, int end)
    {
        int length = Regex.Replace(source, @"[^\x00-\xff]", "OK").Length;
        if ((length <= begin) && (length >= end))
        {
            return false;
        }
        return true;
    }
    #endregion

    #region 是不是中国电话，格式010-85849685
    /// <summary>
    /// 是不是中国电话，格式010-85849685
    /// </summary>
    /// <param name="source"></param>
    /// <returns></returns>
    public static bool IsTel(string source)
    {
        return Regex.IsMatch(source, @"^\d{3,4}-?\d{6,8}$", RegexOptions.IgnoreCase);
    }
    #endregion

    #region 邮政编码 6个数字
    /// <summary>
    /// 邮政编码 6个数字
    /// </summary>
    /// <param name="source"></param>
    /// <returns></returns>
    public static bool IsPostCode(string source)
    {
        return Regex.IsMatch(source, @"^\d{6}$", RegexOptions.IgnoreCase);
    }
    #endregion

    #region 中文
    /// <summary>
    /// 中文
    /// </summary>
    /// <param name="source"></param>
    /// <returns></returns>
    public static bool IsChinese(string source)
    {
        return Regex.IsMatch(source, @"^[\u4e00-\u9fa5]+$", RegexOptions.IgnoreCase);
    }
    public static bool hasChinese(string source)
    {
        return Regex.IsMatch(source, @"[\u4e00-\u9fa5]+", RegexOptions.IgnoreCase);
    }
    #endregion

    #region 验证是不是正常字符字母，数字，下划线的组合
    /// <summary>
    /// 验证是不是正常字符字母，数字，下划线的组合
    /// </summary>
    /// <param name="source"></param>
    /// <returns></returns>
    public static bool IsNormalChar(string source)
    {
        return Regex.IsMatch(source, @"[\w\d_]+", RegexOptions.IgnoreCase);
    }
    #endregion

    #region 验证用户名：必须以字母开头，可以包含字母、数字、“_”、“.”，至少5个字符
    /// <summary>
    /// 验证用户名：必须以字母开头，可以包含字母、数字、“_”、“.”，至少5个字符
    /// </summary>
    /// <param name="str"></param>
    /// <returns></returns>
    public static bool checkUserId(string str)
    {
        Regex regex = new Regex("[a-zA-Z]{1}([a-zA-Z0-9]|[._]){4,19}");
        if (regex.Match(str).Success)
            if (regex.Matches(str)[0].Value.Length == str.Length)
                return true;
        return false;
    }

#endregion

    #region 验证是否为小数
    bool IsValidDecimal(string strIn)
    {

return Regex.IsMatch(strIn, @"[0].d{1,2}|[1]");
}

#endregion

    #region 验证年月日
    bool IsValidDate(string strIn)
    {
        return Regex.IsMatch(strIn, @"^2d{3}-(?:0?[1-9]|1[0-2])-(?:0?[1-9]|[1-2]d|3[0-1])(?:0?[1-9]|1d|2[0-3]):(?:0?[1-9]|[1-5]d):(?:0?[1-9]|[1-5]d)$");
    }
    #endregion

    #region 验证日期格式
    //检察是否正确的日期格式
    public static bool IsDate(string str)
    {
        //考虑到了4年一度的366天，还有特殊的2月的日期
        Regex reg = new Regex(@"^((((1[6-9]|[2-9]\d)\d{2})-(0?[13578]|1[02])-(0?[1-9]|[12]\d|3[01]))|(((1[6-9]|[2-9]\d)\d{2})-(0?[13456789]|1[012])-(0?[1-9]|[12]\d|30))|(((1[6-9]|[2-9]\d)\d{2})-0?2-(0?[1-9]|1\d|2[0-8]))|(((1[6-9]|[2-9]\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))-0?2-29-)) (20|21|22|23|[0-1]?\d):[0-5]?\d:[0-5]?\d$");
        return reg.IsMatch(str);
    }
    #endregion

    #region 验证后缀名
    bool IsValidPostfix(string strIn)
    {
        return Regex.IsMatch(strIn, @".(?i:gif|jpg)$");
    }
    #endregion

    #region 验证字符是否在4至12之间
    bool IsValidByte(string strIn)
    {
        return Regex.IsMatch(strIn, @"^[a-z]{4,12}$");
    }
    #endregion

    #region dd-mm-yy 的日期形式代替 mm/dd/yy 的日期形式
    string MDYToDMY(String input)
    {
        return Regex.Replace(input, "http://www.cnblogs.com/tiantangwater/admin/file://b(/?\\d{1,2})/(?\\d{1,2})/(?\\d{2,4})\\b", "${day}-${month}-${year}");
    }

#endregion

    #region MD5加密
    /// <summary>
    /// MD5加密，返回加密过的字符串
    /// </summary>
    /// <param name="InEncrypt">要加密的字符串</param>
    /// <returns></returns>
    public static string Md5(string InEncrypt)
    {
        return System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(InEncrypt, "MD5");
    }
    #endregion

    #region 判断输入是否为空并弹出错误信息
    /// <summary>
    /// 判断输入是否为空并弹出错误信息
    /// </summary>
    /// <param name="str">验证内容</param>
    /// <param name="erroStr">错误提示内容</param>
    /// <returns>bool</returns>
    public static bool IsEmpty(string str, string erroStr)
    {
        bool result = false;
        if (string.Empty == str)
        {
            Validator.erro(erroStr);
            result = true;
        }
        return result;
    }
    #endregion

    #region 判断字符串是否为数字
    /// <summary>
    /// 判断字符串是否为数字
    /// </summary>
    /// <param name="str">待验证的字符窜</param>
    /// <returns>bool</returns>
    public static bool IsNumber(string str)
    {
        bool result = true;
        foreach (char ar in str)
        {
            if (!char.IsNumber(ar))
            {
                result = false;
                break;
            }
        }
        return result;
    }
    #endregion

    #region 是否为数字型
    /// <summary>
    /// 是否为数字型
    /// </summary>
    /// <param name="strNumber"></param>
    /// <returns></returns>
    public static bool IsDecimal(string strNumber)
    {
        return new System.Text.RegularExpressions.Regex(@"^([0-9])[0-9]*(\.\w*)?$").IsMatch(strNumber);
    }
    #endregion

#region 字符串转换\数字转换转换为安全格式

    /// <summary>
    /// 返回安全整数类型
    /// </summary>
    /// <param name="str">要转换的字符串</param>
    /// <returns>int16 整形数字</returns>
    public static string safeInt(string str)
    {
        string constr = "0";
        try
        {
            constr = (Convert.ToInt16(str)).ToString();
            return constr;
        }
        catch
        {
            return constr;
        }
    }
    ///////////////////////////////////////////////
    //
    // 功能：安全处理用户提供的字符串内容
    //
    // 作者：依依秋寒
    // 时间：2008-10-27
    //
    ///////////////////////////////////////////////

    /// <summary>
    /// 转化为安全字符串去除其中的英文单引号
    /// </summary>
    /// <param name="str">字符串内容</param>
    /// <returns>string 处理后的</returns>
    public static string safeStr(string str)
    {
        try
        {
            str = str.Replace("'", "'");
            str = str.Replace("\"", """);
            str = str.Replace("<", "<");
            str = str.Replace(">", ">");
            return str;
        }
        catch
        {
            return "";
        }
    }

    /// <summary>
    /// 把字符串转化为安全的text内容
    /// </summary>
    /// <param name="str">传入的字符串内容</param>
    /// <returns>转化后结果 string</returns>
    public static string safeText(string str)
    {
        try
        {
            str = str.Replace("'", "'");
            str = str.Replace("\"", """);
            str = str.Replace("<", "<");
            str = str.Replace(">", ">");
            str = str.Replace("\n", "<br />");
            return str;
        }
        catch
        {
            return "";
        }
    }

    ///////////////////////////////////////////////
    //
    // 功能：把经过安全处理的字符串返原成用户提交的内容
    //
    // 作者：依依秋寒
    // 时间：2008-10-27
    //
    ///////////////////////////////////////////////

    /// <summary>
    /// 把'还原成单引号
    /// </summary>
    /// <param name="str"></param>
    /// <returns></returns>
    public static string safeStrToSource(string str)
    {
        try
        {
            str = str.Replace("<", "<");
            str = str.Replace(">", ">");
            str = str.Replace(""", "\"");
            str = str.Replace("'", "'");
            str = str.Replace(" ", " ");
            return str;
        }
        catch
        {
            return "";
        }
    }

    /// <summary>
    /// 把经过安全的text内容转化为源字符串
    /// </summary>
    /// <param name="str">传入的字符串内容</param>
    /// <returns></returns>
    public static string safeTextToSource(string str)
    {
        try
        {
            str = str.Replace("<br />", "\n");
            str = str.Replace("<", "<");
            str = str.Replace(">", ">");
            str = str.Replace(""", "\"");
            str = str.Replace("'", "'");
            str = str.Replace(" ", " ");
            return str;
        }
        catch
        {
            return "";
        }
    }

    /// <summary>
    /// 是否安全
    /// </summary>
    /// <param name="str"></param>
    /// <returns></returns>
    public static bool IsSafeSql(string str)
    {
        string sql = str.ToLower();
        if (sql.Contains("delete"))
        {
            return false;
        }
        else if (sql.Contains("select"))
        {
            return false;
        }
        else if (sql.Contains("update"))
        {
            return false;
        }
        else if (sql.Contains("drop"))
        {
            return false;
        }
        else if (sql.Contains("execute"))
        {
            return false;
        }
        else if (sql.Contains("exec"))
        {
            return false;
        }
        else if (sql.Contains("'"))
        {
            return false;
        }
        return true;
    }

    /// <summary>
    /// 替换不安全sql
    /// </summary>
    /// <param name="str"></param>
    /// <returns></returns>
    public static string SafeSql(string str)
    {
        System.Text.StringBuilder sb = new StringBuilder(str.ToLower());
        sb.Replace("delete", "");
        sb.Replace("select", "");
        sb.Replace("update", "");
        sb.Replace("drop", "");
        sb.Replace("execute", "");
        sb.Replace("exec", "");
        sb.Replace("'", "");
        return sb.ToString();
    }
    #endregion

    #region 全角\半角转换
    /// <summary>
    /// 全角转半角的函数(DBC case)
    /// </summary>
    /// <param name="input">任意字符串</param>
    /// <returns>半角字符串</returns>
    ///<remarks>
    ///全角空格为12288，半角空格为32
    ///其他字符半角(33-126)与全角(65281-65374)的对应关系是：均相差65248
    ///</remarks>
    public static string ToDBC(string input)
    {
        char[] c = input.ToCharArray();
        for (int i = 0; i < c.Length; i++)
        {
            if (c[i] == 12288)
            {
                c[i] = (char)32;
                continue;
            }
            if (c[i] > 65280 && c[i] < 65375)
                c[i] = (char)(c[i] - 65248);
        }
        return new string(c);
    }
    /// <summary>
    /// 半角转全角的函数(SBC case)
    /// </summary>
    /// <param name="input">任意字符串</param>
    /// <returns>全角字符串</returns>
    ///<remarks>
    ///全角空格为12288，半角空格为32
    ///其他字符半角(33-126)与全角(65281-65374)的对应关系是：均相差65248
    ///</remarks>
    public static string ToSBC(string input)
    {
        //半角转全角：
        char[] c = input.ToCharArray();
        for (int i = 0; i < c.Length; i++)
        {
            if (c[i] == 32)
            {
                c[i] = (char)12288;
                continue;
            }
            if (c[i] < 127)
                c[i] = (char)(c[i] + 65248);
        }
        return new string(c);
    }
    #endregion

#region 弹出信息\跳转

    /// <summary>
    /// 弹出警告信息并跳转到指定页面地址
    /// </summary>
    /// <param name="str">警告信息内容</param>
    /// <param name="url">指定要跳转的页面抵制</param>
    public static void alert(string str, string url)
    {
        System.Web.HttpContext.Current.Response.Write("<script language='javascript'>alert('" + str + "');location.href='" + url + "'</script>");
    }

    /// <summary>
    /// 弹出警告信息并返回申请页
    /// </summary>
    /// <param name="str">警告信息内容</param>
    public static void alert(string str)
    {
        System.Web.HttpContext.Current.Response.Write("<script language='javascript'>alert('" + str + "');location.href='" + System.Web.HttpContext.Current.Request.RawUrl + "'</script>");
    }

    /// <summary>
    /// 弹出信息无跳转动作
    /// </summary>
    /// <param name="str">信息内容</param>
    public static void erro(string str)
    {
        System.Web.HttpContext.Current.Response.Write("<script language='javascript'>alert('" + str + "');</script>");
    }

    /// <summary>
    /// 后退一页
    /// </summary>
    public static void goback()
    {
        System.Web.HttpContext.Current.Response.Write("<script language='javascript'>history.go(-1);</script>");
    }

    /// <summary>
    /// 执行js命令
    /// </summary>
    /// <param name="function">传入要执行的js函数[包含参数的函数]</param>
    public static void DoJsFunction(string function)
    {
        System.Web.HttpContext.Current.Response.Write("<script language='javascript'>" + function + "</script>");
    }
    #endregion

    #region 删除文本中带的HTML标记
    /// <summary>
    /// 删除文本中带的HTML标记
    /// </summary>
    /// <param name="InString">输入要删除带HTML的字符串</param>
    /// <returns>返回处理过的字符串</returns>
    public static string DelHtmlCode(string InString)
    {
        string strTemp = InString;
        int htmlBeginNum = 0;
        int htmlEndNum = 0;
        while (strTemp.Contains("<"))
        {
            if (!strTemp.Contains(">")) { break; }    //当字符串内不包含">"时退出循环

            htmlBeginNum = strTemp.IndexOf("<");
            htmlEndNum = strTemp.IndexOf(">");
            //删除从"<"到">"之间的所有字符串
            strTemp = strTemp.Remove(htmlBeginNum, htmlEndNum - htmlBeginNum + 1);
        }
        strTemp = strTemp.Replace("\n", "");
        strTemp = strTemp.Replace("\r", "");
        strTemp = strTemp.Replace("\n\r", "");
        strTemp = strTemp.Replace(" ", "");
        strTemp = strTemp.Replace(" ", "");
        strTemp = strTemp.Trim();
        return strTemp;
    }

    /// <summary>
    /// 去除HTML标记
    /// </summary>
    /// <param name="NoHTML">包括HTML的源码 </param>
    /// <returns>已经去除后的文字</returns>
    public static string NoHTML(string Htmlstring)
    {
        string strOutput = Htmlstring;

strOutput = Regex.Replace(strOutput, @"<script[^>]*?>.*?</script>", "", RegexOptions.IgnoreCase);
        strOutput = Regex.Replace(strOutput, @"<(.[^>]*)>", "", RegexOptions.IgnoreCase);
        strOutput = Regex.Replace(strOutput, @"([\r\n])[\s]+", "", RegexOptions.IgnoreCase);
        strOutput = Regex.Replace(strOutput, @"-->", "", RegexOptions.IgnoreCase);
        strOutput = Regex.Replace(strOutput, @"<!--.*", "", RegexOptions.IgnoreCase);

        strOutput = Regex.Replace(strOutput, @"&(quot|#34);", "\"", RegexOptions.IgnoreCase);
        strOutput = Regex.Replace(strOutput, @"&(amp|#38);", "&", RegexOptions.IgnoreCase);
        strOutput = Regex.Replace(strOutput, @"&(lt|#60);", "<", RegexOptions.IgnoreCase);
        strOutput = Regex.Replace(strOutput, @"&(gt|#62);", ">", RegexOptions.IgnoreCase);
        strOutput = Regex.Replace(strOutput, @"&(nbsp|#160);", " ", RegexOptions.IgnoreCase);
        strOutput = Regex.Replace(strOutput, @"&(iexcl|#161);", "\xa1", RegexOptions.IgnoreCase);
        strOutput = Regex.Replace(strOutput, @"&(cent|#162);", "\xa2", RegexOptions.IgnoreCase);
        strOutput = Regex.Replace(strOutput, @"&(pound|#163);", "\xa3", RegexOptions.IgnoreCase);
        strOutput = Regex.Replace(strOutput, @"&(copy|#169);", "\xa9", RegexOptions.IgnoreCase);
        strOutput = Regex.Replace(strOutput, @"&#(\d+);", "", RegexOptions.IgnoreCase);

        strOutput.Replace("<", "");
        strOutput.Replace(">", "");
        strOutput.Replace("\r\n", "");
        strOutput = HttpContext.Current.Server.HtmlEncode(strOutput).Trim();

return HttpContext.Current.Server.HtmlEncode(strOutput).Trim();
}

#endregion

    #region 截取字符串
    /// <summary>
    /// 从字符串左边起给定的位置截取字符串
    /// </summary>
    /// <param name="str">给定要截取的字符串内容</param>
    /// <param name="len">截取的起始位置</param>
    /// <returns>截取后的字符串 string</returns>
    public static string leftstr(string str, int len)
    {

        if (str.Length > len && len > 0)
        {
            return str.Substring(0, len - 1) + "…";
        }
        else
        {
            return str;
        }

}
#endregion

    #region 截取字符串
    /// <summary>
    /// 截取相应数目的字符
    /// </summary>
    public static string MyLeftFunction(string mText, int byteCount)
    {
        if (byteCount < 1) return mText;

        if (System.Text.Encoding.Default.GetByteCount(mText) <= byteCount)
        {
            return mText;
        }
        else
        {
            byte[] txtBytes = System.Text.Encoding.Default.GetBytes(mText);
            byte[] newBytes = new byte[byteCount - 4];

for (int i = 0; i < byteCount - 4; i++)
newBytes[i] = txtBytes[i];

            return System.Text.Encoding.Default.GetString(newBytes) + "...";
        }
    }
    #endregion

    #region 编码解码
    /// <summary>
    /// 解码得到url值
    /// </summary>
    /// <param name="str">string</param>
    /// <returns>string</returns>
    public static string Decode(string str)
    {
        return HttpContext.Current.Server.UrlDecode(str);
    }

    /// <summary>
    /// 编码传入url
    /// </summary>
    /// <param name="str">string</param>
    /// <returns>string</returns>
    public static string Encode(string str)
    {
        return HttpContext.Current.Server.UrlEncode(str);
    }
    #endregion

    #region 返回组合的查询条件
    /// <summary>
    /// 返回组合的查询条件
    /// </summary>
    /// <param name="i"> 1 and = ,2 or = ,3 and like ,4 or like, 5 时间段</param>
    /// <param name="columnName"></param>
    /// <param name="value"></param>
    /// <returns></returns>
    public static string BackSearchReson(int i, string columnName, string value)
    {
        string reson = "";
        if (columnName != string.Empty && value != string.Empty)
        {
            switch (i)
            {
                case 1:
                    reson += " and " + columnName + "='" + value + "'";
                    break;
                case 2:
                    reson += " or " + columnName + "='" + value + "'";
                    break;
                case 3:
                    reson += " and " + columnName + " like'%" + value + "%'";
                    break;
                case 4:
                    reson += " or " + columnName + " like'%" + value + "%'";
                    break;
                case 5:
                    reson += " and (" + columnName + ">'" + Convert.ToDateTime(value).ToString() + "' and " + columnName + "<'" + Convert.ToDateTime(value).AddDays(1).ToString() + "')";
                    break;
            }
        }
        return reson;
    }
    #endregion

    #region 过滤字符串,过滤掉从输入框输入的一些非法字符，防注入！
    public static string InputText(string text, int maxLength)
    {
        text = text.Trim();
        if (text.Length == 0)
            return string.Empty;
        //if (text.Length > maxLength)
        //text = text.Substring(0, maxLength);
        text = Regex.Replace(text, "(<[b|B][r|R]/*>)+|(<[p|P](.|\\n)*?>)", "\n");//<br/>
        text = Regex.Replace(text, "(http://www.cnblogs.com/tiantangwater/admin/file://s*&[n%7cn][b%7cb][s%7cs][p%7cp];//s*)+", " ");// 
        text = Regex.Replace(text, "<(.|\\n)*?>", string.Empty);//any other tags
        text = text.Replace("'", "");
        text = text.Replace(" ", "");
        text = text.Replace("%", "");
        text = text.Replace("!", "");
        text = text.Replace("~", "");
        text = text.Replace("`", "");
        text = text.Replace("#", "");
        text = text.Replace("$", "");
        text = text.Replace("^", "");
        text = text.Replace("&", "");
        text = text.Replace("*", "");
        text = text.Replace("(", "");
        text = text.Replace(")", "");
        text = text.Replace("{", "");
        text = text.Replace("}", "");
        text = text.Replace("[", "");
        text = text.Replace("]", "");
        text = text.Replace(",", "");
        text = text.Replace("/", "");
        text = text.Replace("@", "");
        text = text.Replace("-", "");
        text = text.Replace("=", "");
        text = text.Replace("+", "");
        text = text.Replace("|", "");
        text = text.Replace(".", "");
        return text;
    }
    #endregion

    #region 验证是否包含汉语/全部汉语
    /// <summary>
    /// 验证是否包含汉语
    /// </summary>
    /// <param name="str"></param>
    /// <returns></returns>
    public static bool IsHanyu(string str)
    {
        Regex regex = new Regex("[\u4e00-\u9fa5]");
        if (regex.Match(str).Success)
            return true;
        else
            return false;
    }

    /// <summary>
    /// 验证是否全部汉语
    /// </summary>
    /// <param name="str"></param>
    /// <returns></returns>
    public static bool IsHanyuAll(string str)
    {
        Regex regex = new Regex("[\u4e00-\u9fa5]");
        //匹配的内容长度和被验证的内容长度相同时，验证通过
        if (regex.Match(str).Success)
            if (regex.Matches(str).Count == str.Length)
                return true;
        //其它，未通过
        return false;
    }
    #endregion

}