Convert or Export Gridview to Excel in Asp.NET C#

 private void ExportGridView(string Leg, GridView GV)
    {
        string attachment = string.Empty;
        attachment = "attachment; filename=" + Leg + "Report.xls";
        Response.ClearContent();
        Response.AddHeader("content-disposition", attachment);
        Response.ContentType = "application/ms-excel";
     
        StringWriter sw = new StringWriter();
        HtmlTextWriter htw = new HtmlTextWriter(sw);
     
        try
        {
            GV.RenderControl(htw);
        }
        catch (HttpException)
        {

        }
        Response.Write("<h4><b>Material Stocl Ledger<b><h4>");
        Response.Write(sw.ToString());
        Response.End();
    }
    public override void VerifyRenderingInServerForm(Control control)
    {
        /* Verifies that the control is rendered */
    }