CustomValidator，用户自定义的验证控件的简单例子

    
     


    
  
    

        
                    ControlToValidate="TextBox3" ErrorMessage="嘿嘿，错了哈" 
            onservervalidate="CustomValidator1_ServerValidate" 
            ClientValidationFunction="must1">
    
 
   
 
 
    

  protected void CustomValidator1_ServerValidate(object source, ServerValidateEventArgs args)
        {
            if (args.Value == "1")
            {
                args.IsValid = true;
            }
            else
            {
                args.IsValid = false;
            }
        }