ValidatorCalloutExtender
The ValidatorCalloutExtender control in Ajax extends the functionality of the existing ASP.NET validation controls.
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox> <asp:Button ID="Button1" runat="server" Text="Button" /> <asp:RequiredFieldValidator ID="RFD" runat="server" ControlToValidate="TextBox1" ErrorMessage="Textbox should not be empty" Display="None"></asp:RequiredFieldValidator> <ajaxToolkit:ValidatorCalloutExtender runat="Server" ID="ValidatorCalloutExtender 1" TargetControlID="RFD" Width="350px"/>
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Very informative post its really helpful for me and helped me to complete my task. Thanks for sharing with us. I have found another nice post with wonderful explanation on Ajax Toolkit ValidatorCalloutExtender Control in ASP.Net, for more details of that post please check out this link…
Ajax Toolkit ValidatorCalloutExtender Control in ASP.Net
Thanks
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