“/”应用程序中的服务器错误。

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行 19:     {
行 20:         //删除脚本   
行 21:         Htmlstring = Regex.Replace(Htmlstring, @"]*?>.*?", "", RegexOptions.IgnoreCase);
行 22:         //删除HTML   
行 23:         Htmlstring = Regex.Replace(Htmlstring, @"<(.[^>]*)>", "", RegexOptions.IgnoreCase);

[ArgumentNullException: 值不能为 null。
参数名: input]
   System.Text.RegularExpressions.Regex.Replace(String input, String replacement) +6993684
   System.Text.RegularExpressions.Regex.Replace(String input, String pattern, String replacement, RegexOptions options) +96
   Currency.RemoveHTML(String Htmlstring) in c:\ShuangHuan\App_Code\Currency.cs:21
   search.Page_Load(Object sender, EventArgs e) in c:\ShuangHuan\EN\search.aspx.cs:37
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +52
   System.Web.UI.Control.OnLoad(EventArgs e) +97
   System.Web.UI.Control.LoadRecursive() +61
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +693