Validation ASP.Net Tutorial

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<%@ Page Language="C#" %>



    Regular Expression Tester


    
    

    
        Email:
        
                      runat="server" 
           ControlToValidate="txtEmail"  
           ValidationExpression="^(.+)@([^\.].*)\.([a-z]{2,})$"
           Text="Enter a valid email" />   
        
         
                        Text="Click this to test validation" 
                  runat="server" />