Hi friends, in
this article I will explain about How to use ValidationSummary control in ASP.NET, Custom Validation Summary in
ASP.NET.
The ValidationSummary
control is used to display a summary of all validation errors occurred in a Web
page.
The error message displayed in this
control is specified by the ErrorMessage
property of each validation control. If the ErrorMessage property of the validation control is not set, no
error message is displayed for that validation control.