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字符輸入檢查
public class Input
    {
        /// <summary>
        /// 檢測是否整數(shù)型數(shù)據(jù)
        /// </summary>
        /// <param name="Num">待檢查數(shù)據(jù)</param>
        /// <returns></returns>
        public static bool IsInteger(string Input)
        {
            if (Input == null)
            {
                return false;
            }
            else
            {
                return IsInteger(Input, true);
            }
        }
  
        /// <summary>
        /// 是否全是正整數(shù)
        /// </summary>
        /// <param name="Input"></param>
        /// <returns></returns>
        public static bool IsInteger(string Input, bool Plus)
        {
            if (Input == null)
            {
                return false;
            }
            else
            {
                string pattern = "^-?[0-9]+$";
                if (Plus)
                    pattern = "^[0-9]+$";
                if (Regex.Match(Input, pattern, RegexOptions.Compiled).Success)
                {
                    return true;
                }
                else
                {
                    return false;
                }
            }
        }
  
        /// <summary>
        /// 判斷輸入是否為日期類型
        /// </summary>
        /// <param name="s">待檢查數(shù)據(jù)</param>
        /// <returns></returns>
        public static bool IsDate(string s)
        {
            try
            {
                DateTime d = DateTime.Parse(s);
                return true;
            }
            catch
            {
                return false;
            }
        }
  
  
        /// <summary>
        /// 過濾字符串中的html代碼
        /// </summary>
        /// <param name="Str"></param>
        /// <returns>返回過濾之后的字符串</returns>
        public static string LostHTML(string Str)
        {
            string Re_Str = "";
            if (Str != null)
            {
                if (Str != string.Empty)
                {
                    string Pattern = "<\/*[^<>]*>";
                    Re_Str = Regex.Replace(Str, Pattern, "");
                }
            }
            return (Re_Str.Replace("\r\n", "")).Replace("\r", "");
        }
  
        public static string LostPage(string Str)
        {
            string Re_Str = "";
            if (Str != null)
            {
                if (Str != string.Empty)
                {
                    string Pattern = "\[NT:PAGE\/*[^<>]*\$\]";
                    Re_Str = Regex.Replace(Str, Pattern, "");
                }
            }
            return Re_Str;
        }
  
        public static string LostVoteStr(string Str)
        {
            string Re_Str = "";
            if (Str != null)
            {
                if (Str != string.Empty)
                {
                    string Pattern = "\[NT:unLoop\/*[^<>]*\[\/NT:unLoop\]";
                    Re_Str = Regex.Replace(Str, Pattern, "");
                }
            }
            return Re_Str;
        }
  
        /// <summary>
        /// 根據(jù)新聞標(biāo)題的屬性設(shè)置返回設(shè)置后的標(biāo)題
        /// </summary>
        /// <param name="Title">標(biāo)題</param>
        /// <param name="TitleColor">標(biāo)題顏色</param>
        /// <param name="IsB">是否粗體</param>
        /// <param name="IsI">是否斜體</param>
        /// <param name="TitleNum">返回標(biāo)題字?jǐn)?shù)</param>
        /// <returns>返回設(shè)置后的標(biāo)題</returns>
        public static string GetColorTitleSubStr(string Title, string TitleColor, int IsB, int IsI, int TitleNum)
        {
            string Return_title = "";
            string FormatTitle = LostHTML(Title);
            if (FormatTitle != null && FormatTitle != string.Empty)
            {
                FormatTitle = GetSubString(FormatTitle, TitleNum);
                if (IsB == 1)
                {
                    FormatTitle = "<b>" + FormatTitle + "</b>";
                }
                if (IsI == 1)
                {
                    FormatTitle = "<i>" + FormatTitle + "</i>";
                }
                if (TitleColor != null && TitleColor != string.Empty)
                {
                    FormatTitle = "<font style="color:" + TitleColor + ";">" + FormatTitle + "</font>";
                }
                Return_title = FormatTitle;
            }
            return Return_title;
        }
  
  
        /// <summary>
        /// 截取字符串函數(shù)
        /// </summary>
        /// <param name="Str">所要截取的字符串</param>
        /// <param name="Num">截取字符串的長度</param>
        /// <returns></returns>
        public static string GetSubString(string Str, int Num)
        {
            if (Str == null || Str == "")
                return "";
            string outstr = "";
            int n = 0;
            foreach (char ch in Str)
            {
                n += System.Text.Encoding.Default.GetByteCount(ch.ToString());
                if (n > Num)
                    break;
                else
                    outstr += ch;
            }
            return outstr;
        }
        /// <summary>
        /// 截取字符串函數(shù)
        /// </summary>
        /// <param name="Str">所要截取的字符串</param>
        /// <param name="Num">截取字符串的長度</param>
        /// <param name="Num">截取字符串后省略部分的字符串</param>
        /// <returns></returns>
        public static string GetSubString(string Str, int Num, string LastStr)
        {
            if (string.IsNullOrEmpty(Str)) return "";
            return (Str.Length > Num) ? Str.Substring(0, Num) + LastStr : Str;
        }
  
        /// <summary>
        /// 驗(yàn)證字符串是否是圖片路徑
        /// </summary>
        /// <param name="Input">待檢測的字符串</param>
        /// <returns>返回true 或 false</returns>
        public static bool IsImgString(string Input)
        {
            return IsImgString(Input, "/{@dirfile}/");
        }
  
        public static bool IsImgString(string Input, string checkStr)
        {
            bool re_Val = false;
            if (Input != string.Empty)
            {
                string s_input = Input.ToLower();
                if (s_input.IndexOf(checkStr.ToLower()) != -1 && s_input.IndexOf(".") != -1)
                {
                    string Ex_Name = s_input.Substring(s_input.LastIndexOf(".") + 1).ToString().ToLower();
                    if (Ex_Name == "jpg" || Ex_Name == "gif" || Ex_Name == "bmp" || Ex_Name == "png")
                    {
                        re_Val = true;
                    }
                }
            }
            return re_Val;
        }
  
  
        /// <summary>
        ///  將字符轉(zhuǎn)化為HTML編碼
        /// </summary>
        /// <param name="str">待處理的字符串</param>
        /// <returns></returns>
        public static string HtmlEncode(string Input)
        {
            return HttpContext.Current.Server.HtmlEncode(Input);
        }
  
        /// <summary>
        /// 
        /// </summary>
        /// <param name="Input"></param>
        /// <returns></returns>
        public static string HtmlDecode(string Input)
        {
            return HttpContext.Current.Server.HtmlDecode(Input);
        }
  
        /// <summary>
        /// URL地址編碼
        /// </summary>
        /// <param name="Input"></param>
        /// <returns></returns>
        public static string URLEncode(string Input)
        {
            return HttpContext.Current.Server.UrlEncode(Input);
        }
  
        /// <summary>
        /// URL地址解碼
        /// </summary>
        /// <param name="Input"></param>
        /// <returns></returns>
        public static string URLDecode(string Input)
        {
            return HttpContext.Current.Server.UrlDecode(Input);
        }
  
        /// <summary>
        /// 過濾字符
        /// </summary>
        /// <param name="Input"></param>
        /// <returns></returns>
        public static string Filter(string sInput)
        {
            if (sInput == null || sInput == "")
                return null;
            string sInput1 = sInput.ToLower();
            string output = sInput;
            string pattern = @"*|and|exec|insert|select|delete|update|count|master|truncate|declare|char(|mid(|chr(|'";
            if (Regex.Match(sInput1, Regex.Escape(pattern), RegexOptions.Compiled | RegexOptions.IgnoreCase).Success)
            {
                throw new Exception("字符串中含有非法字符!");
            }
            else
            {
                output = output.Replace("'", "''");
            }
            return output;
        }
  
        /// <summary>
        /// 過濾特殊字符/前臺會員
        /// </summary>
        /// <param name="Input"></param>
        /// <returns></returns>
        public static string Htmls(string Input)
        {
            if (Input != string.Empty && Input != null)
            {
                string ihtml = Input.ToLower();
                ihtml = ihtml.Replace("<script", "<script");
                ihtml = ihtml.Replace("script>", "script>");
                ihtml = ihtml.Replace("<%", "<%");
                ihtml = ihtml.Replace("%>", "%>");
                ihtml = ihtml.Replace("<$", "<$");
                ihtml = ihtml.Replace("$>", "$>");
                return ihtml;
            }
            else
            {
                return string.Empty;
            }
        }
  
        /// <summary>
        /// 字符串字符處理
        /// </summary>
        /// <param name="chr">等待處理的字符串</param>
        /// <returns>處理后的字符串</returns>
        /// //把HTML代碼轉(zhuǎn)換成TXT格式
        public static String ToTxt(String Input)
        {
            StringBuilder sb = new StringBuilder(Input);
            sb.Replace(" ", " ");
            sb.Replace("<br>", "
");
            sb.Replace("<br>", "
");
            sb.Replace("<br />", "
");
            sb.Replace("<br />", "
");
            sb.Replace("<", "<");
            sb.Replace(">", ">");
            sb.Replace("&", "&");
            return sb.ToString();
        }
  
        /// <summary>
        /// 字符串字符處理
        /// </summary>
        /// <param name="chr">等待處理的字符串</param>
        /// <returns>處理后的字符串</returns>
        /// //把HTML代碼轉(zhuǎn)換成TXT格式
        public static String ToshowTxt(String Input)
        {
            StringBuilder sb = new StringBuilder(Input);
            sb.Replace("<", "<");
            sb.Replace(">", ">");
            return sb.ToString();
        }
  
        /// <summary>
        /// 把字符轉(zhuǎn)化為文本格式
        /// </summary>
        /// <param name="Input"></param>
        /// <returns></returns>
        public static string ForTXT(string Input)
        {
            StringBuilder sb = new StringBuilder(Input);
            sb.Replace("<font", " ");
            sb.Replace("<span", " ");
            sb.Replace("<style", " ");
            sb.Replace("<div", " ");
            sb.Replace("<p", "");
            sb.Replace("</p>", "");
            sb.Replace("<label", " ");
            sb.Replace(" ", " ");
            sb.Replace("<br>", "");
            sb.Replace("<br />", "");
            sb.Replace("<br />", "");
            sb.Replace("<", "");
            sb.Replace(">", "");
            sb.Replace("&", "");
            sb.Replace("<", "");
            sb.Replace(">", "");
            return sb.ToString();
        }
        /// <summary>
        /// 字符串字符處理
        /// </summary>
        /// <param name="chr">等待處理的字符串</param>
        /// <returns>處理后的字符串</returns>
        /// //把TXT代碼轉(zhuǎn)換成HTML格式
        public static String ToHtml(string Input)
        {
            StringBuilder sb = new StringBuilder(Input);
            sb.Replace("&", "&");
            sb.Replace("<", "<");
            sb.Replace(">", ">");
            sb.Replace("
", "<br />");
            sb.Replace("
", "<br />");
            sb.Replace("    ", " ");
            //sb.Replace(" ", " ");
            return sb.ToString();
        }
        public static String ToHtmlWithOutImg(string Input)
        {
            StringBuilder sb = new StringBuilder(Input);
            if (Input.IndexOf("/editor/editor/images/smiley/") <= 0)
            {
                sb.Replace("<", "<");
                sb.Replace(">", ">");
            }
            sb.Replace("&", "&");
            sb.Replace("
", "<br />");
            sb.Replace("
", "<br />");
            sb.Replace("    ", " ");
            //sb.Replace(" ", " ");
            return sb.ToString();
        }
  
        /// <summary>
        /// MD5加密字符串處理
        /// </summary>
        /// <param name="Half">加密是16位還是32位;如果為true為16位</param>
        /// <param name="Input">待加密碼字符串</param>
        /// <returns></returns>
        public static string MD5(string Input, bool Half)
        {
            string output = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(Input, "MD5").ToLower();
            if (Half)//16位MD5加密(取32位加密的9~25字符)
                output = output.Substring(8, 16);
            return output;
        }
  
        public static string MD5(string Input)
        {
            return MD5(Input, true);
        }
  
        /// <summary>
        /// 字符串加密  進(jìn)行位移操作
        /// </summary>
        /// <param name="str">待加密數(shù)據(jù)</param>
        /// <returns>加密后的數(shù)據(jù)</returns>
        public static string EncryptString(string Input)
        {
            string _temp = "";
            int _inttemp;
            char[] _chartemp = Input.ToCharArray();
            for (int i = 0; i < _chartemp.Length; i++)
            {
                _inttemp = _chartemp[i] + 1;
                _chartemp[i] = (char)_inttemp;
                _temp += _chartemp[i];
            }
            return _temp;
        }
  
        /// <summary>
        /// 字符串解密
        /// </summary>
        /// <param name="str">待解密數(shù)據(jù)</param>
        /// <returns>解密成功后的數(shù)據(jù)</returns>
        public static string NcyString(string Input)
        {
            string _temp = "";
            int _inttemp;
            char[] _chartemp = Input.ToCharArray();
            for (int i = 0; i < _chartemp.Length; i++)
            {
                _inttemp = _chartemp[i] - 1;
                _chartemp[i] = (char)_inttemp;
                _temp += _chartemp[i];
            }
            return _temp;
        }
  
        /// <summary>
        /// 檢測含中文字符串實(shí)際長度
        /// </summary>
        /// <param name="str">待檢測的字符串</param>
        /// <returns>返回正整數(shù)</returns>
        public static int NumChar(string Input)
        {
            ASCIIEncoding n = new ASCIIEncoding();
            byte[] b = n.GetBytes(Input);
            int l = 0;
            for (int i = 0; i <= b.Length - 1; i++)
            {
                if (b[i] == 63)//判斷是否為漢字或全腳符號
                {
                    l++;
                }
                l++;
            }
            return l;
        }
  
        /// <summary>
        /// 檢測是否合法日期
        /// </summary>
        /// <param name="str">待檢測的字符串</param>
        /// <returns></returns>
        public static bool ChkDate(string Input)
        {
            try
            {
                DateTime t1 = DateTime.Parse(Input);
                return true;
            }
            catch
            {
                return false;
            }
        }
  
        /// <summary>
        /// 轉(zhuǎn)換日期時間函數(shù)
        /// </summary>
        /// <returns></returns>        
        public static string ReDateTime()
        {
            return System.DateTime.Now.ToString("yyyyMMdd");
        }
  
  
  
        /// <summary>
        /// 去除字符串最后一個','號
        /// </summary>
        /// <param name="chr">:要做處理的字符串</param>
        /// <returns>返回已處理的字符串</returns>
        public static string CutComma(string Input)
        {
            return CutComma(Input, ",");
        }
  
        public static string CutComma(string Input, string indexStr)
        {
            if (Input.IndexOf(indexStr) >= 0)
                return Input.Remove(Input.LastIndexOf(indexStr));
            else
                return Input;
        }
  
        /// <summary>
        /// 去掉首尾P
        /// </summary>
        /// <param name="Input"></param>
        /// <returns></returns>
        public static string RemovePor(string Input)
        {
            if (Input != string.Empty && Input != null)
            {
                string TMPStr = Input;
                if (Input.ToLower().Substring(0, 3) == "<p>")
                {
                    TMPStr = TMPStr.Substring(3);
                }
                if (TMPStr.Substring(TMPStr.Length - 4) == "</p>")
                {
                    TMPStr = TMPStr.Remove(TMPStr.ToLower().LastIndexOf("</p>"));
                }
                return TMPStr;
            }
            else
            {
                return string.Empty;
            }
        }
  
        /// <summary>
        /// 判斷參數(shù)是否合法
        /// </summary>
        /// <param name="ID">要判斷的參數(shù)</param>
        /// <returns>返回已處理的字符串</returns>
  
        public static string checkID(string ID)
        {
            if (ID == null && ID == string.Empty)
                throw new Exception("參數(shù)傳遞錯誤!<li>參數(shù)不能為空</li>");
            return ID;
        }
  
        /// <summary>
        /// 去除編號字符串中的'-1'
        /// </summary>
        /// <param name="id"></param>
        /// <returns>如果為空則返回'IsNull'</returns>
  
        public static string Losestr(string id)
        {
            if (id == null || id == "" || id == string.Empty)
                return "IsNull";
  
            id = id.Replace("'-1',", "");
  
            if (id == null || id == "" || id == string.Empty)
                return "IsNull";
            else
                return id;
        }
  
        public static string FilterHTML(string html)
        {
            if (html == null)
                return "";
            System.Text.RegularExpressions.Regex regex1 = new System.Text.RegularExpressions.Regex(@"<script[sS]+</script *>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            System.Text.RegularExpressions.Regex regex2 = new System.Text.RegularExpressions.Regex(@" href *= *[sS]*script *:", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            System.Text.RegularExpressions.Regex regex3 = new System.Text.RegularExpressions.Regex(@" on[sS]*=", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            System.Text.RegularExpressions.Regex regex4 = new System.Text.RegularExpressions.Regex(@"<iframe[sS]+</iframe *>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            System.Text.RegularExpressions.Regex regex5 = new System.Text.RegularExpressions.Regex(@"<frameset[sS]+</frameset *>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            System.Text.RegularExpressions.Regex regex6 = new System.Text.RegularExpressions.Regex(@"<img[^>]+>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            System.Text.RegularExpressions.Regex regex7 = new System.Text.RegularExpressions.Regex(@"</p>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            System.Text.RegularExpressions.Regex regex8 = new System.Text.RegularExpressions.Regex(@"<p>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            System.Text.RegularExpressions.Regex regex9 = new System.Text.RegularExpressions.Regex(@"<[^>]*>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            html = regex1.Replace(html, ""); //過濾<script></script>標(biāo)記
            html = regex2.Replace(html, ""); //過濾href=javascript: (<A>) 屬性
            html = regex3.Replace(html, " _disibledevent="); //過濾其它控件的on...事件
            html = regex4.Replace(html, ""); //過濾iframe
            html = regex5.Replace(html, ""); //過濾frameset
            html = regex6.Replace(html, ""); //過濾frameset
            html = regex7.Replace(html, ""); //過濾frameset
            html = regex8.Replace(html, ""); //過濾frameset
            html = regex9.Replace(html, "");
            html = html.Replace(" ", "");
            html = html.Replace("</strong>", "");
            html = html.Replace("<strong>", "");
            return html;
        }
  
        #region 加密
        private static byte[] Keys = { 0x41, 0x72, 0x65, 0x79, 0x6F, 0x75, 0x6D, 0x79, 0x53, 0x6E, 0x6F, 0x77, 0x6D, 0x61, 0x6E, 0x3F };
        public static string AESEncode(string encryptString, string encryptKey)
        {
            encryptKey = Utils.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 AESDecode(string decryptString, string decryptKey)
        {
            try
            {
                decryptKey = Utils.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>
        /// DES加密字符串
        /// </summary>
        /// <param name="encryptString">待加密的字符串</param>
        /// <param name="encryptKey">加密密鑰,要求為8位</param>
        /// <returns>加密成功返回加密后的字符串,失敗返回源串</returns>
        public static string DESEncode(string encryptString, string encryptKey)
        {
            encryptKey = Utils.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">解密密鑰,要求為8位,和加密密鑰相同</param>
        /// <returns>解密成功返回解密后的字符串,失敗返源串</returns>
        public static string DESDecode(string decryptString, string decryptKey)
        {
            try
            {
                decryptKey = Utils.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 "";
            }
  
        }
        #endregion
  
    }
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