AJAX :: Gridview In ModalPopup Extender?

Feb 4, 2011

i have a page insert data to sql server. On the page there is a combobox and there is a button next to the combox box . when i click the button, open a modal popup extender, adds some data to database. I use gridview in the mpe. The problem is

<asp:Button ID="btnInsert" runat="server" Text="Add" CommandName="Add" CssClass="gridButtons"/>


i want to show alert message if the user presses the "Add" button without entering anything to the textbox.

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