Export to word from gridview in c#

protected void ImageButton2_Click(object sender, ImageClickEventArgs e)

{

Response.ClearContent();

Response.Buffer = true;

Response.AddHeader("content-disposition", string.Format("attachment; filename={0}", "Individual report of user" + " " + ddlagent.SelectedItem.Text + ".doc"));

Response.ContentType = "application/ms-word";

StringWriter sw = new StringWriter();

HtmlTextWriter htw = new HtmlTextWriter(sw);

getgrid();

//Change the Header Row back to white color

//Applying stlye to gridview header cells

DataList1.RenderControl(htw);

Response.Write(sw.ToString());

Response.End();

}