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protected void btnExport_Click(object sender, EventArgs e)
{
System.IO.StringWriter tw = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter(tw);
foreach (Control cr in panelx.Controls)
{
cr.RenderControl(hw);
}
string attachment = "attachment; filename=" + DateTime.Now.ToShortDateString() + ".xls";
HttpContext.Current.Response.ClearContent();
HttpContext.Current.Response.AddHeader("content-disposition", attachment);
Response.Charset = "UTF-8";
Response.ContentEncoding = System.Text.Encoding.GetEncoding("UTF-8");
Response.Write(tw.ToString());
Response.End();
}