asp.net datagrid导出到excel c#问题

我有经典的asp.net网站。我有一个数据网格，我想导出为excel工作表。该站点使用windows身份验证

我拿起电话寻求解决办法。以下是我在FF和Chrome中的体验，需要帮助来纠正它：

有时，文件下载不会出现任何问题，但如果我让窗口保持不活动状态一分钟左右，然后重试，则我会发现页面未找到问题，或者浏览器会继续要求登录（有点陷入循环）

有些时候，当点击导出按钮时，FF会继续显示windows登录弹出窗口，就像它陷入了一个循环

按钮：

<asp:Button ID="cmdExportDataGridToExcel_Click" runat="server" OnClick="cmdExportToExcel_Click" CssClass="StandardText" Text="Export to Excel" Width="120px" Height="33px"></asp:Button>

更新1 我通过将数据放入会话中，然后从会话中创建excel来测试它。这也会导致同样的错误

var dv = (DataView) Session["ScheduledOrdersReport"];

            Response.Clear();
            var userName = CommonMethods.GetUserId();
            var fileName = string.Format("ScheduledOrdersReport-{0}-{1:yyyyMMddhhmmsstt}.xls", userName, DateTime.Now);

            Response.AddHeader("content-disposition", "attachment; filename=" + fileName);
            Response.Charset = "";
            Response.ContentType = "application/vnd.ms-excel"; //"application/vnd.xls";

            var stringWrite = new StringWriter();
            var htmlWrite = new HtmlTextWriter(stringWrite);

            var g = new GridView();
            g.DataSource = dv;
            g.DataBind();

            g.RenderControl(htmlWrite);
            Response.Write(stringWrite.ToString());
            Response.End();

更新2 我只是做了另一个测试，打开一个弹出窗口，然后使用更新1代码。无问题，单击或保留页面一段时间，然后再次单击按钮

看起来这是回邮和回复的问题

---

我只是在这个时候找不到任何合适的方法来解决这个问题。也许我需要休息一下

如何启动webclient？ 并设置网络凭据？那么你不能每次都登录

比如：

`

var dv = (DataView) Session["ScheduledOrdersReport"];

            Response.Clear();
            var userName = CommonMethods.GetUserId();
            var fileName = string.Format("ScheduledOrdersReport-{0}-{1:yyyyMMddhhmmsstt}.xls", userName, DateTime.Now);

            Response.AddHeader("content-disposition", "attachment; filename=" + fileName);
            Response.Charset = "";
            Response.ContentType = "application/vnd.ms-excel"; //"application/vnd.xls";

            var stringWrite = new StringWriter();
            var htmlWrite = new HtmlTextWriter(stringWrite);

            var g = new GridView();
            g.DataSource = dv;
            g.DataBind();

            g.RenderControl(htmlWrite);
            Response.Write(stringWrite.ToString());
            Response.End();

`using(Webclient webclient = new Webclient())
   {
     webClient http = new Webclient();
     http.Credentials = new NetworkCredential("YourUsername", "YourPassword");
    }