Error using GridView's RenderControl property during Export to Excel

When you try to Export the results from a GridView to excel using the GridView's RenderControl property, one might face an error stating that the server control must be placed inside a form tag with runat="server".

We can overcome this problem by ovverriding the Page.VerifyRenderingInServerForm() Method. This confirms that for a specified ASP.NET server control an HtmlForm control is rendered at run time.

Following is a sample piece of code:

protected void btnExport_Click(object sender, EventArgs e)
System.IO.StringWriter objStringWriter = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter objHtmlTextWriter = new System.Web.UI.HtmlTextWriter(objStringWriter);


public override void VerifyRenderingInServerForm(Control control)


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Author: tadelasatishkumar26 Aug 2010 Member Level: Gold   Points : 0

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