导出excel

  /// <summary>
    /// 将网格数据导出到Excel
    /// </summary>
    /// <param name="ctrl">网格名称(如GridView1)</param>
    /// <param name="FileType">要导出的文件类型(Excel:application/ms-excel)</param>
    /// <param name="FileName">要保存的文件名</param>
    public static void GridViewToExcel(Control ctrl, string FileType, string FileName)
    {
        HttpContext.Current.Response.Charset = "GB2312";
        HttpContext.Current.Response.ContentEncoding = Encoding.UTF8;//注意编码
        HttpContext.Current.Response.AppendHeader("Content-Disposition",
            "attachment;filename=" + HttpUtility.UrlEncode(FileName, Encoding.UTF8).ToString());
        HttpContext.Current.Response.ContentType = FileType;//image/JPEG;text/HTML;image/GIF;vnd.ms-excel/msword
        ctrl.Page.EnableViewState = false;
        StringWriter tw = new StringWriter();
        HtmlTextWriter hw = new HtmlTextWriter(tw);
        ctrl.RenderControl(hw);
        HttpContext.Current.Response.Write(tw.ToString());
        HttpContext.Current.Response.End();
    }
    public override void VerifyRenderingInServerForm(Control control)
    {
    }