Validator or Expression in VB.net to check if the value entered in that textbox?

Use a CustomValidator msdn.microsoft.com/en-us/library/9eee01c...).aspx and do your logic in the code-behind Edit - added You can also do client side validation in javascript, of course. The details are in the article I linked to.

Use a CustomValidator msdn.microsoft.com/en-us/library/9eee01c...).aspx and do your logic in the code-behind. Edit - added You can also do client side validation in javascript, of course. The details are in the article I linked to.

THanks,I am new for custom validator can I have code for the above problem – Manu Sep 24 '09 at 13:59.

Thanks David! I solve my above issue using below code. I wrote custom validator.

DateOfReceiving: ' /> TokenStartingNumber: ' /> And In my Codebehind I used this logic. Sub TokenStartValidation(ByVal source As Object, ByVal arguments As ServerValidateEventArgs) If CType(FormView1. FindControl("DateOfReceivingTextBox"), TextBox).

Text = "" Then arguments. IsValid = True Else arguments. IsValid = False End If End Sub Please have a look and suggest me if something is wrong!

Cheers!

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