public void ExportExcel12(Control ctl, string fileName)
{
Response.Clear();
Response.ContentType = "application/vnd.ms-excel";
Response.Charset = "GB2312";
Response.AppendHeader("Content-Disposition", "attachment;filename=\"" + System.Web.HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8) + ".xls");
Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312"); //设置输出流为简体中文
this.EnableViewState = false;
Response.Write("<meta http-equiv=Content-Type content=\"text/html; charset=GB2312\">");
System.IO.StringWriter sw = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter(sw);
ctl.RenderControl(hw);
Response.Write(sw.ToString());
Response.End();
}