Excel導出不工作與WebControl表

Question

在我的應用程序中我已經綁定sql數據源到網格視圖，單擊導出按鈕我把數據表中的gridviews數據源並創建webControl表並將該控件寫入xls文件。但我正在逐漸follwowing錯誤：

Unable to evaluate expression because the code is optimized or a native frame is on top of the call stack.

我的代碼如下：

HttpResponse Response = HttpContext.Current.Response; 
Response.Clear(); 
string StudNm = Request["hidStudnm"]; 
Response.AddHeader("content-disposition", "attachment;filename=" + "StudentPasswordReport" + ".xls"); 

Response.Charset = ""; 
Response.ContentType = "application/vnd.xls"; 
System.IO.StringWriter stringWrite = new System.IO.StringWriter(); 
System.Web.UI.HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite); 

System.Web.UI.WebControls.Table tblRept; 
tblRept = CreateTable(exportDt); 
tblRept.RenderControl(htmlWrite); 

請告訴我爲什麼發生這個錯誤，我怎麼能甲階酚醛這個錯誤

Answer 1

你可以試試這個

DataTableToExcel(exportDt); 

    private void DataTableToExcel(DataTable dataTable) 
    { 
     StringWriter writer = new StringWriter(); 
     HtmlTextWriter htmlWriter = new HtmlTextWriter(writer); 
     GridView gridView = new GridView(); 
     gridView.DataSource = dataTable; 
     gridView.AutoGenerateColumns = true; 
     gridView.DataBind(); 
     gridView.RenderControl(htmlWriter); 
     htmlWriter.Close(); 

     Response.Clear(); 
     Response.AddHeader("content-disposition", "attachment;filename=FileName.xls"); 
     Response.Charset = ""; 
     Response.Write(writer.ToString()); 
     Response.End(); 
}