0

我收到以下错误

Error: Sys.WebForms.PageRequestManagerParserErrorException: The message received from the server could not be parsed. Common causes for this error are when the response is modified by calls to Response.Write(), response filters, HttpModules, or server trace is enabled.

我想把网格放在excel onclick

Sub bttntxtfile_Click(ByVal sender As Object, ByVal e As EventArgs)
    GridViewExportUtil.Export("Customers.xls", GridView1)
End Sub

public class GridViewExportUtil
{

public static void Export(string fileName, GridView gv)
{
    HttpContext.Current.Response.Clear();
    HttpContext.Current.Response.AddHeader(
        "content-disposition", string.Format("attachment; filename={0}", fileName));
    HttpContext.Current.Response.ContentType = "application/ms-excel";

    using (StringWriter sw = new StringWriter())
    {
        using (HtmlTextWriter htw = new HtmlTextWriter(sw))
        {
            //  Create a form to contain the grid
            Table table = new Table();

            //  add the header row to the table
            if (gv.HeaderRow != null)
            {
                GridViewExportUtil.PrepareControlForExport(gv.HeaderRow);
                table.Rows.Add(gv.HeaderRow);
            }

            //  add each of the data rows to the table
            foreach (GridViewRow row in gv.Rows)
            {
                GridViewExportUtil.PrepareControlForExport(row);
                table.Rows.Add(row);
            }

            //  add the footer row to the table
            if (gv.FooterRow != null)
            {
                GridViewExportUtil.PrepareControlForExport(gv.FooterRow);
                table.Rows.Add(gv.FooterRow);
            }

            //  render the table into the htmlwriter
            table.RenderControl(htw);

            //  render the htmlwriter into the response
           HttpContext.Current.Response.Write(sw.ToString());

        }
    }
}

/// <summary>
/// Replace any of the contained controls with literals
/// </summary>
/// <param name="control"></param>
private static void PrepareControlForExport(Control control)
{
    for (int i = 0; i < control.Controls.Count; i++)
    {
        Control current = control.Controls[i];
        if (current is LinkButton)
        {
            control.Controls.Remove(current);
            control.Controls.AddAt(i, new LiteralControl((current as LinkButton).Text));
        }
        else if (current is ImageButton)
        {
            control.Controls.Remove(current);
            control.Controls.AddAt(i, new LiteralControl((current as ImageButton).AlternateText));
        }
        else if (current is HyperLink)
        {
            control.Controls.Remove(current);
            control.Controls.AddAt(i, new LiteralControl((current as HyperLink).Text));
        }
        else if (current is DropDownList)
        {
            control.Controls.Remove(current);
            control.Controls.AddAt(i, new LiteralControl((current as DropDownList).SelectedItem.Text));
        }
        else if (current is CheckBox)
        {
            control.Controls.Remove(current);
            control.Controls.AddAt(i, new LiteralControl((current as CheckBox).Checked ? "True" : "False"));
        }

        if (current.HasControls())
        {
            GridViewExportUtil.PrepareControlForExport(current);
        }
    }
}
}

我有两个 response.redirects 但我将它们注释掉了，但我仍然得到了错误。有没有人见过这个错误？难道我做错了什么？

我认为这与 httpcontext.current.response.clear 和 httpContext.current.response.addheader 行有关

4

2 回答 2

1

如果您的“导出到 Excel”按钮位于更新面板内，则“PageRequestManagerParserErrorException”可能是由调用 Response.Write() 引起的。从更新面板中删除按钮或使用PostBackTrigger。

有关更多信息，请参阅本文。

于 2009-09-12T04:00:38.043 回答
0

这应该有帮助..

它更多的是关于读取/写入数据到excel，而不是专门从gridview，但任何.net程序员都应该能够做到这一点..

http://support.microsoft.com/kb/316934#10

于 2009-09-11T19:51:33.980 回答