Hi,When i tried to export the data from the gridview to excel I got the following error
Could anyone help me out

Control 'GridView1' of type 'GridView' must be placed inside a form tag with runat=server.

my form tag contains runat ="server"

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Shaalini.S
Be the Best of Whatever you are...

This is pretty confusing, since your GridView is already inside the form tags and also contains the runat = server attribute. You can easily resolve this error by adding the following lines.

public override void VerifyRenderingInServerForm(Control control)
{
/* Confirms that an HtmlForm control is rendered for the specified ASP.NET
server control at run time. No code Required here */

}

Hi blue sky,
I have tried with your following code but now i m getting following error
RegisterForEventValidation can only be called during Render();

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Shaalini.S
Be the Best of Whatever you are...

Hi shaalini,
There are a couple of approches that can be taken to allow for a control to be programmatically rendered without raising the event validation-related exception. The simplest approach is to simply disable event validation for the page. This can be done by setting the EnableEventValidation attribute in the <% @Page %> directive to False:
<% @Page EnableEventValidation="False" ... %>
If you are using the base Page class technique to override the Page class's VerifyRenderingInServerForm() method, you can always override the EnableEventValidation property there, instead.

The other option is to leave the event validation feature enabled, but just wait to programmatically render the control until the Render stage. By doing this, when the control registers for event validation it will be in the Render stage and so the "RegisterForEventValidation can only be called during Render()" exception won't be raised. To accomplish this, you'll need to set some flag in the Button's Click event handler (or wherever you decide to programmatically render the control).

Hi bluesky ,

Thanx.It works fine.

__________________
Shaalini.S
Be the Best of Whatever you are...