Allowing Posting with Client-Side Validation Errors

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ASP.NET Web Forms Web Forms Server Controls Web Forms Validation

By default, when client-side validation is being performed, the user cannot post the form to the server if there are errors on the page. However, you might find it necessary to allow the user to post even with errors.

Set the global page variable Page_PostIfValidationError to true.

Data Entry Validation ( Client-Side )

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