1. 程式人生 > >C# 過濾sql特殊字串方法

C# 過濾sql特殊字串方法

/// <summary>/// 過濾標記
/// </summary>/// <param name="NoHTML">包括HTML,指令碼,資料庫關鍵字,特殊字元的原始碼 </param>/// <returns>已經去除標記後的文字</returns>public string NoHtml(string Htmlstring)
{
   
if (Htmlstring ==null)
    {
       
return"";
    }
   
else
    {
       
//刪除指令碼         Htmlstring = Regex.Replace(Htmlstring,
@"<script[^>]*?>.*?</script>", "", RegexOptions.IgnoreCase);
       
//刪除HTML        Htmlstring = Regex.Replace(Htmlstring, @"<(.[^>]*)>", "", RegexOptions.IgnoreCase);
        Htmlstring
= Regex.Replace(Htmlstring, @"([\r\n])[\s]+", "", RegexOptions.IgnoreCase);
        Htmlstring
= Regex.Replace(Htmlstring, @"-->", "", RegexOptions.IgnoreCase);
        Htmlstring
= Regex.Replace(Htmlstring, @"<!--.*", "", RegexOptions.IgnoreCase);
        Htmlstring
= Regex.Replace(Htmlstring, @"&(quot|#34);", "\"", RegexOptions.IgnoreCase);
        Htmlstring
= Regex.Replace(Htmlstring,
@"&(amp|#38);", "&", RegexOptions.IgnoreCase);
        Htmlstring
= Regex.Replace(Htmlstring, @"&(lt|#60);", "<", RegexOptions.IgnoreCase);
        Htmlstring
= Regex.Replace(Htmlstring, @"&(gt|#62);", ">", RegexOptions.IgnoreCase);
        Htmlstring
= Regex.Replace(Htmlstring, @"&(nbsp|#160);", "", RegexOptions.IgnoreCase);
        Htmlstring
= Regex.Replace(Htmlstring, @"&(iexcl|#161);", "\xa1", RegexOptions.IgnoreCase);
        Htmlstring
= Regex.Replace(Htmlstring, @"&(cent|#162);", "\xa2", RegexOptions.IgnoreCase);
        Htmlstring
= Regex.Replace(Htmlstring, @"&(pound|#163);", "\xa3", RegexOptions.IgnoreCase);
        Htmlstring
= Regex.Replace(Htmlstring, @"&(copy|#169);", "\xa9", RegexOptions.IgnoreCase);
        Htmlstring
= Regex.Replace(Htmlstring, @"&#(\d+);", "", RegexOptions.IgnoreCase);
        Htmlstring
= Regex.Replace(Htmlstring, "xp_cmdshell", "", RegexOptions.IgnoreCase);

       
//刪除與資料庫相關的詞         Htmlstring = Regex.Replace(Htmlstring, "select", "", RegexOptions.IgnoreCase);
        Htmlstring
= Regex.Replace(Htmlstring, "insert", "", RegexOptions.IgnoreCase);
        Htmlstring
= Regex.Replace(Htmlstring, "delete from", "", RegexOptions.IgnoreCase);
        Htmlstring
= Regex.Replace(Htmlstring, "count''", "", RegexOptions.IgnoreCase);
        Htmlstring
= Regex.Replace(Htmlstring, "drop table", "", RegexOptions.IgnoreCase);
        Htmlstring
= Regex.Replace(Htmlstring, "truncate", "", RegexOptions.IgnoreCase);
        Htmlstring
= Regex.Replace(Htmlstring, "asc", "", RegexOptions.IgnoreCase);
        Htmlstring
= Regex.Replace(Htmlstring, "mid", "", RegexOptions.IgnoreCase);
        Htmlstring
= Regex.Replace(Htmlstring, "char", "", RegexOptions.IgnoreCase);
        Htmlstring
= Regex.Replace(Htmlstring, "xp_cmdshell", "", RegexOptions.IgnoreCase);
        Htmlstring
= Regex.Replace(Htmlstring, "exec master", "", RegexOptions.IgnoreCase);
        Htmlstring
= Regex.Replace(Htmlstring, "net localgroup administrators", "", RegexOptions.IgnoreCase);
        Htmlstring
= Regex.Replace(Htmlstring, "and", "", RegexOptions.IgnoreCase);
        Htmlstring
= Regex.Replace(Htmlstring, "net user", "", RegexOptions.IgnoreCase);
        Htmlstring
= Regex.Replace(Htmlstring, "or", "", RegexOptions.IgnoreCase);
        Htmlstring
= Regex.Replace(Htmlstring, "net", "", RegexOptions.IgnoreCase);
       
//Htmlstring = Regex.Replace(Htmlstring, "*", "", RegexOptions.IgnoreCase);        Htmlstring = Regex.Replace(Htmlstring, "-", "", RegexOptions.IgnoreCase);
        Htmlstring
= Regex.Replace(Htmlstring, "delete", "", RegexOptions.IgnoreCase);
        Htmlstring
= Regex.Replace(Htmlstring, "drop", "", RegexOptions.IgnoreCase);
        Htmlstring
= Regex.Replace(Htmlstring, "script", "", RegexOptions.IgnoreCase);

       
//特殊的字元         Htmlstring = Htmlstring.Replace("<", "");
        Htmlstring
= Htmlstring.Replace(">", "");
        Htmlstring
= Htmlstring.Replace("*", "");
        Htmlstring
= Htmlstring.Replace("-", "");
        Htmlstring
= Htmlstring.Replace("?", "");
        Htmlstring
= Htmlstring.Replace("'", "''");
        Htmlstring
= Htmlstring.Replace(",", "");
        Htmlstring
= Htmlstring.Replace("/", "");
        Htmlstring
= Htmlstring.Replace(";", "");
        Htmlstring
= Htmlstring.Replace("*/", "");
        Htmlstring
= Htmlstring.Replace("\r\n", "");
        Htmlstring
= HttpContext.Current.Server.HtmlEncode(Htmlstring).Trim();

       
return Htmlstring;
   }
}

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