如何从更新面板中的面板下载pdf

我有一个使用母版页的网站 .

我的一个内容页面基本上是一个大型的UpdatePanel . UpdatePanel内部是一个常规Panel . 常规Panel内部是Gridview . Gridview内部是一个Linkbutton，指向存储在我的数据库中的pdf .

当我单击Linkbutton来检索pdf时，没有任何反应 .

我在另一个没有UpdatePanel的页面上工作 .

我已经尝试从Linkbutton触发“外部”按钮并将此按钮注册为PostBack事件 . 单击“链接”按钮时页面会回发，但不会将pdf发送给用户 .

以下是一些示例代码：

<asp:UpdatePanel ID="UpdatePanelClaims" runat="server">
<ContentTemplate>

<asp:Panel ID="upClaimAttachment" runat="server" Visible="false" >

        <table id="gridClaimAttachmentTable" runat="server" class="table" >
            <tr>
                <td >
                    <asp:GridView ID="grdClaimAttachment" runat="server" AllowPaging="True" AllowSorting="True" 
                        AutoGenerateColumns="False" CssClass="table table-striped table-bordered table-condensed table-hover" EmptyDataText="No Attachments for this Claim."
                        EnableTheming="False" onpageindexchanging="grdClaimAttachment_PageIndexChanging"   PageSize="15" OnRowCommand="grdClaimAttachment_RowCommand"
                        OnRowDataBound="grdClaimAttachment_RowDataBound" >
                        <PagerStyle CssClass="bs-pagination" />
                        <AlternatingRowStyle CssClass="alternateColor" />
                        <RowStyle CssClass="rowsStyle" />
                        <Columns>
                            <asp:BoundField DataField="ID" HeaderText="ID" ItemStyle-CssClass="hideColumn" HeaderStyle-CssClass="hideColumn" >
                                <HeaderStyle HorizontalAlign="Left" />
                                <ItemStyle HorizontalAlign="Right" />
                            </asp:BoundField>
                            <asp:TemplateField HeaderText="File Name">
                                <ItemTemplate>
                                    <asp:LinkButton ID="btnViewAttachment" Text='<%#Eval("FileName") %>' CommandName="ViewAttachment"
                                        CommandArgument="<%# Container.DataItemIndex %>" runat="server"></asp:LinkButton></ItemTemplate>
                            </asp:TemplateField>

                            <asp:ButtonField ButtonType="Button" CommandName="btnDelete" Text="Delete">
                                <ControlStyle CssClass="btn btn-info btn-xs " />
                            </asp:ButtonField>
                        </Columns>
                        <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
                        <SortedAscendingCellStyle BackColor="#E9E7E2" />
                        <SortedAscendingHeaderStyle BackColor="#506C8C" />
                        <SortedDescendingCellStyle BackColor="#FFFDF8" />
                        <SortedDescendingHeaderStyle BackColor="#6F8DAE" />
                    </asp:GridView>
                </td>
            </tr>
            <tr >
                <td>
                    <div class="container">
                        <div class="form-group form-group-sm form-groupNoSpace">
                            <div class="row">
                                <div class=" col-xs-4 col-xs-offset-4 text-right">
                                    <asp:Button ID="btnClaimAttachmentAdd" runat="server" CssClass="btn btn-primary btn-sm btn-block" Text="Add Attachment" OnClick="btnClaimAttachmentAdd_Click"/>
                                </div>
                            </div>
                        </div>
                        </div>

                </td>
            </tr>
        </table>

</asp:Panel> <%-- Attachment Update Panel --%>

<asp:Button ID="btnClickMe" runat="server" OnClick="btnClickMe_Click" Visible="false" />

</ContentTemplate>
  <Triggers>
      <asp:PostBackTrigger ControlID="btnClickMe" />
  </Triggers>
</asp:UpdatePanel> <%-- UpdatePanelClaims --%>

在后面的代码我有这个：

protected void btnClickMe_Click(object sender, EventArgs e, ClaimAttachment objAttachment)
    {
        ViewAttachment(objAttachment);
    }

    private void ViewAttachment(ClaimAttachment objAttachment)
    {
        Response.Clear();
        Response.Buffer = true;
        Response.ContentType = "application/pdf";
        Response.AppendHeader("content-disposition", "attachment;filename=" + objAttachment.FileName);
        Response.Charset = "";
        Response.Cache.SetCacheability(HttpCacheability.NoCache);
        Response.BinaryWrite(objAttachment.Attachment);
        Response.Flush();
        Response.End();
    }

更新：忘了一些关键代码！

protected void grdClaimAttachment_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        try
        {
            int index = Convert.ToInt32(e.CommandArgument);

            if (index >= grdClaimAttachment.Rows.Count)
                return;

            int IDkey = Convert.ToInt32(grdClaimAttachment.Rows[index].Cells[0].Text);
            ClaimAttachment objClaimAttachment = ClaimAttachment.RetrieveById((string)Session["Username"], IDkey);

            if (e.CommandName == "btnDelete")
            {
                ltlDeleteID.Text = IDkey.ToString();
                ltlRecordType.Text = "attachment";
                confirmDialog(string.Format("DELETE Attachment: {0} ?", objClaimAttachment.FileName));
            }
            else if (e.CommandName == "ViewAttachment")
            {
                //btnClickMe.CommandArgument = IDkey.ToString();
                //btnClickMe_Click(sender, e);
                btnClickMe.Click += new EventHandler((s1, e1) => btnClickMe_Click(s1, e1, objClaimAttachment));
                btnClickMe_Click(sender, e, objClaimAttachment);
            }
        }
        catch (BLException be)
        {
            errDialog(be.Message);
        }
    }

The Linkbutton in the grid is actually calling the Click event of an external button to perform the pdf download...

我错过了什么？就像我说的，如果我删除所有UpdatePanel但我需要它们用于其他事情，这是有效的...

谢谢！