problem with displayin the error message of custom validator

Posted by karthik on Stack Overflow See other posts from Stack Overflow or by karthik
Published on 2010-05-10T08:20:36Z Indexed on 2010/05/10 8:24 UTC
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c#

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ASP.NET

i have a listbox control inside updatepanel. and a custom validator associated with the listbox. i made true for the validateemptytext property of the custom validator. it should display the error message wen it's empty wen i click a button. it's workin properly except the very first time. help me.

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