protected void ExportExcel()
{
Response.Clear();
Response.Buffer = true;
Response.ContentType = "application/vnd.ms-excel";
Response.AddHeader("content-disposition", "attachment;filename=" + ddlplanner.SelectedItem.Text.Replace(" ", "_") + "_Activities_" + DateTime.Now.ToString("yyyy-dd-M--HH-mm-ss").Replace("-", "_") + ".xls");
Response.Charset = "";
this.EnableViewState = false;
System.IO.StringWriter sw = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter htw = new System.Web.UI.HtmlTextWriter(sw);
GridViewLMS_excel.RenderControl(htw);
Response.Write(sw.ToString());
Response.End();
}
