Asp.Net Login Website creation

Question

hi all,

This is velsamy , i have created a login  Website using ASP.NET(C#) , what is the problem means, I have to prevent the special characters in the username textbox also i have tried a way like : 

 Code Behind:

protected void ValidateNoUrls(object sender, ServerValidateEventArgs e)
    {
       e.IsValid = !Regex.IsMatch(e.Value, @"(ht|f)tp(s?)\:\/\/[0-9a-zA-Z]([-.\w]*[0-9a-zA-Z])*(:(0-9)*)*(\/?)([a-zA-Z0-9\-\.\?\,\'\/\\\+&%\$#_]*)?");
    }

aspx:

<asp:TextBox ID="TextBox1" runat="server" MaxLength="15" Width="220px" />
                    <asp:CustomValidator runat="server" OnServerValidate="ValidateNoUrls" ControlToValidate="TextBox1" ErrorMessage="Urls not allowed"/>

While i Triying this code there is a Compiler Error Message: CS0103: The name 'Regex' does not exist in the current context.

So anyone can help me, 

Thanks in advance,

Velsamy A

Answer 1

Velsamy A,

Have you added reference to below namespace in the code behind?

Namespace:  System.Text.RegularExpressions
Assembly:  System (in System.dll)

-Tejas.

Answer 2

Hi Velsamy,

You can consider posting it at the following more appropriate forum for more efficient responses. Thanks!

ASP.Net Forum http://forums.asp.net/

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Bob Shen [MSFT]
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