Re: Validator message disappeared after post back

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Hi HipHop,

To make the validator work in or before a postback, the control who will
cause the postback must have CausesValidation set to true. Would you please
set the TextBox's CausesValidation to true and test it again:

<asp:TextBox ID="TextBox1" runat="server" CausesValidation="true"
AutoPostBack="true" OnTextChanged="TextBox1_TextChanged"></asp:TextBox></td>


I've tested it on my side using your code, if the CausesValidation is set
to true, the page will not be posted back since client-side validation is
enabled and the validation result is false, therefore it prevents the page
being posted back.


Regards,
Walter Wang (wawang@xxxxxxxxxxxxxxxxxxxx, remove 'online.')
Microsoft Online Community Support

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