Exporting Gridveiw data int o excel file

hi guys exporting files from gridview is quite simple

u have to just put this code inside buttononclick
code:
protected void btnExcel_Click(object sender, EventArgs e)
{
Response.Clear();
Response.ContentType = "application/vnd.ms-excel";
Response.AddHeader("content-disposition", "attachment;filename=My Report_" + System.DateTime.Today.Date.ToShortDateString().Replace("/", "_") + ".xls");
Response.Charset = "";
System.IO.StringWriter stringWrite = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite);



GridView1.RenderControl(htmlWrite);
Response.Write(stringWrite.ToString());
Response.End();

}
if u compile this code i wont work finely.

All you need to do is to override the VerifyRenderingInServerForum event as I have shown below.

public override void VerifyRenderingInServerForm(Control control)

{
// Confirms that an HtmlForm control is rendered for the specified ASP.NET server control at run time.

}

After that if it shows the error

Control 'Gridview1' of type 'GridView' must be placed inside a form tag with runat=server

Then open user .aspx file in that u just add the attribute EnableEventValidation="false" like this

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="accounting.aspx.cs" Inherits="accounting" EnableEventValidation="false" %>



Now ur code will works fine