在sharepoint中下载文件后不再回发

Question

我试图从sharepoint下载文件.但是在我下载这个文件后,我无法点击其他按钮.我的编码出了什么问题？

这是我的第一条路.

            Response.AppendHeader("content-disposition", "attachment; filename= " + fileName);
            Response.ContentType = "text/plain";
            Response.WriteFile(Server.MapPath("~/" + fileName));
            Response.End();

这是我的第二种方式

            byte[] bytes = System.IO.File.ReadAllBytes("D:\\" + fileName);

            Response.ClearContent();
            Response.ClearHeaders();
            Response.AddHeader("Content-Type", "application/octet-stream");
            Response.AddHeader("Content-Length", bytes.Length.ToString());

            Response.AddHeader("content-disposition", "attachment; filename= " + fileName);

            Response.BinaryWrite(bytes);
            Response.Flush();
            Response.End();

我甚至评论Response.End()但仍然是相同的结果.

还有其他方法我应该尝试吗？

任何帮助将非常感激.事实上,我几天前发布了这个问题,但只有一个人给了我第二种尝试方法,但它仍然没有用.

谢谢.

UPDATE

这是GridView下的GridView.

           <asp:GridView ID="gvGiro" Width="100%" runat="server" GridLines="Both" AllowPaging="false" CssClass="form-table" ShowHeader="false"
                AllowSorting="false" AutoGenerateColumns="false" OnRowDataBound="gvGiro_RowDataBound">
                <Columns>
                    <asp:TemplateField ItemStyle-Width="20%" ItemStyle-HorizontalAlign="Center">
                        <ItemTemplate>
                            <asp:Label ID="lblValueDate" Text='<%# getDate(Eval("ValueDate")) %>' runat="server" />
                        </ItemTemplate>
                    </asp:TemplateField>
                    <asp:TemplateField>
                        <ItemTemplate>

                            <asp:GridView ID="gvDetail" runat="server" AllowPaging="false" AllowSorting="false" 
                                CssClass="list-table border" HeaderStyle-CssClass="header" AutoGenerateColumns="false">
                                <Columns>
                                    <asp:TemplateField HeaderText="Sequence Number" ItemStyle-HorizontalAlign="Left"
                                        ItemStyle-Width="30%" >
                                        <ItemTemplate>
                                            <%#((DataRowView)Container.DataItem)["MessageSeqNbr"] %>
                                        </ItemTemplate>
                                    </asp:TemplateField>
                                    <asp:TemplateField HeaderText="Total Number of Debit Transaction" ItemStyle-HorizontalAlign="Left"
                                        HeaderStyle-HorizontalAlign="Center">
                                        <ItemTemplate>
                                            <%#((DataRowView)Container.DataItem)["TotalDebitNbr"] %>
                                        </ItemTemplate>
                                    </asp:TemplateField>
                                    <asp:TemplateField HeaderText="Status" ItemStyle-HorizontalAlign="Left" ItemStyle-Width="25%"
                                        HeaderStyle-HorizontalAlign="Center">
                                        <ItemTemplate>
                                            <%#((DataRowView)Container.DataItem)["CodeDesc"] %>
                                            <asp:HiddenField ID="hidCode" runat="server" Value='<%#((DataRowView)Container.DataItem)["Code"] %>' />
                                        </ItemTemplate>
                                    </asp:TemplateField>
                                    <asp:TemplateField HeaderText="Action" ItemStyle-HorizontalAlign="Center" ItemStyle-Width="10%"
                                        HeaderStyle-HorizontalAlign="Center">
                                        <ItemTemplate>
                                        <asp:Button ID="btnDownload" runat="server" CssClass="button submit" Text="Download" 
                                CommandName="download" OnCommand="onCmd" CommandArgument='<%#Eval("Id") %>' Width="80px"/>
                                        <asp:Button ID="btnUnbatch" runat="server" CssClass="button generic" Text="Un-Batch"
                                CommandName="unbatch" OnCommand="onCmd" CommandArgument='<%#Eval("Id") %>' Width="80px"/>
                                        </ItemTemplate>
                                    </asp:TemplateField>
                                </Columns>
                            </asp:GridView>
                        </ItemTemplate>
                    </asp:TemplateField>
                </Columns>
            </asp:GridView>

这是我的cs文件

    protected void gvGiro_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        GridView gr;
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            gr = (GridView) e.Row.FindControl("gvDetail");
            using (class2 ct2= new Class2())
            {
                Label lblValueDate = (Label)e.Row.FindControl("lblValueDate");
                DateTime dt= DateTime.MinValue;
                DataSet ds= ct2.GetData(dt);
                gr.DataSource = ds; 
                gr.DataBind();

            }

        }
    }


protected void onCmd(object sender, CommandEventArgs e)
    {
        string id;
        switch (e.CommandName)
        {
            case "unbatch":
                id= e.CommandArgument.ToString();
                Unbatch(id);
                break;
            case"download":
                id= e.CommandArgument.ToString();
                Download(id);
                break;
            default:
                break;
        }
    }

    protected void Download(string id)
    {
        // to do - substitute all hard-code guid
        Guid batchId = new Guid(id);
        string fileName = "";
        Class1 ct = new Class1();


        {
            if (!ct.FileExists(batchId , ref fileName))
            {
                byte[] bytes = System.IO.File.ReadAllBytes("D:\\" + fileName);
            Response.ClearContent();
            Response.ClearHeaders();
            Response.AddHeader("Content-Type", "application/octet-stream");
            Response.AddHeader("Content-Length", bytes.Length.ToString());
            Response.AddHeader("content-disposition", "attachment; filename= " + fileName);
            Response.BinaryWrite(bytes);
            Response.Flush();
            Response.End();
            }

Answer 1

SharePoint在"提交"处理程序上注册JavaScript.在此处理程序中,全局变量_spFormOnSubmitCalled设置为true.SharePoint使用此变量来检查提交是否已执行,并阻止进一步提交.由于您的"下载回发"不会刷新页面,因此该变量仍然存在true.具有所有其他按钮停止工作的效果.

作为解决方法,您可以在下载按钮上的客户端单击处理程序中将此变量设置为false:

Button btn = new Button();
btn.Text = "Download";
btn.Click += DownloadButton_Click;

// set the client click handler
btn.OnClientClick = "window.setTimeout(function() { _spFormOnSubmitCalled = false; }, 10);"

当然,这有点hacky并没有在即将到来的SharePoint版本中工作.

Answer 2

有一种简单的方法可以解决这个问题.注册OnClientClick事件以单击按钮并将_spFormOnSubmitCalled设置为false.

<asp:Button ID="Button1" runat="server" Text="Export" onclick="Button1_Click" OnClientClick="javascript:setFormSubmitToFalse()" />

并将下面的脚本放在page/js文件中.

<script type="text/javascript">
    function setFormSubmitToFalse() {
        _spFormOnSubmitCalled = false;        
        return true;
    }
</script>

Answer 3

我没有成功使用'_spFormOnSubmitCalled'.我把它放在我的Page_Load函数中确实取得了成功.

string js = @"_spSuppressFormOnSubmitWrapper = true;";
this.Page.ClientScript.RegisterStartupScript(this.GetType(), "js", js, true);

Ajax第二个回发在UpdatePanel中的Sharepoint中不起作用提供一些背景信息,说明为什么需要这样做.