關於gridview的資料 匯出exelc

    /// <summary>        /// 匯出為Excel        /// </summary>        /// <param name="control">控制項</param>        /// <param name="encoding">匯出格式</param>        /// <param name="filename">檔案名稱</param>        public static void ConvertToExcel(System.Web.UI.Control control, string encoding, string filename)        {            //設定檔案名稱格式，防止中文檔案名稱亂碼            string FileName = System.Web.HttpUtility.UrlEncode(Encoding.UTF8.GetBytes(filename));            System.Web.HttpContext.Current.Response.Clear();            System.Web.HttpContext.Current.Response.Buffer = true;            System.Web.HttpContext.Current.Response.Charset = "" + encoding + "";            //下面這行很重要， attachment 參數表示作為附件下載，您可以改成 online線上開啟            //filename=FileFlow.xls 指定輸出檔案的名稱，注意其副檔名和指定檔案類型相符，可以為：.doc 　　 .xls 　　 .txt 　　.htm            System.Web.HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + FileName);            System.Web.HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("" + encoding + "");            //Response.ContentType指定檔案類型 可以為application/ms-excel、application/ms-word、application/ms-txt、application/ms-html 或其他瀏覽器可直接支援文檔            System.Web.HttpContext.Current.Response.ContentType = "application/ms-excel";            control.EnableViewState = false;            //　定義一個輸入資料流            System.IO.StringWriter oStringWriter = new System.IO.StringWriter();            System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);            control.RenderControl(oHtmlTextWriter);            //this 表示輸出本頁，你也可以綁定datagrid,或其他支援obj.RenderControl()屬性的控制項            System.Web.HttpContext.Current.Response.Write(oStringWriter.ToString());            System.Web.HttpContext.Current.Response.End();        }

   此方法作為渲染輸出!
 /// <summary>        /// 此方法必重寫，否則會出錯        /// </summary>        /// <param name="control"></param>        public override void VerifyRenderingInServerForm(Control control)        {        }