Question

我有一个棘手的问题，希望我能解释清楚。

以下是我的问题：我有一个用于添加/编辑行的radgrid FormTemplate ，其中我使用了RadAsyncUpload控件来上传文件。在插入和更新时成功上载文件。另外，我在我的radgrid视图中配置了一个链接按钮，可以在需要时下载文件。

问题现在在这里：在上传文件后立即尝试从radgrid视图下载时，我无法下载它。相反，我需要先重新加载页面，然后我可以下载该文件。可能是什么问题呢？我还使用了 grid.rebind（）方法，但这并不起作用。以下是我的代码的简短区域：

<Columns>
                        <telerik:GridButtonColumn Text="Download" HeaderText="Responsible" ItemStyle-ForeColor="Blue" CommandName="DownloadResponsibleAttachment" ColumnGroupName="Attachments"
                            ConfirmTextFields="ResponsibleAttachment" ConfirmTextFormatString="Would you like to download attachment?" HeaderStyle-Width="30px"
                            ConfirmDialogType="RadWindow" Reorderable="false" UniqueName="DownloadResponsibleAttachment" ConfirmTitle="File Download">
                        </telerik:GridButtonColumn>
                    </Columns>
                    <EditFormSettings EditFormType="Template">
                        <FormTemplate>
                            <p class="lbl" style="font: 10px verdana, arial; color: #166c92; font-weight: bold;">Responsible Attachment</p>
                            <telerik:RadAsyncUpload ID="attResponsible" runat="server" InitialFileInputsCount="1" MaxFileInputsCount="1" MaxFileSize="1048576"
                                 TargetFolder="~/Attachments" TemporaryFolder="~/Attachments" TemporaryFileExpiration="600000" ControlObjectsVisibility="None"
                                 OverwriteExistingFiles="true" ToolTip="You can only upload one file with maximum 1 MB." OnFileUploaded="attResponsible_FileUploaded" >
                            </telerik:RadAsyncUpload>

                            <div style="float:right; padding-top:20px;">
                            <asp:Button ID="btnUpdate" CssClass="btn" Text='<%# (Container is GridEditFormInsertItem) ? "Insert" : "Update" %>'
                                runat="server" CommandName='<%# (Container is GridEditFormInsertItem) ? "PerformInsert" : "Update" %>'></asp:Button>&nbsp;
                            <asp:Button ID="btnCancel" CssClass="btn" Text="Cancel" runat="server" CausesValidation="False"
                                CommandName="Cancel"></asp:Button>
                        </FormTemplate>
                    </EditFormSettings>

Answer 1

如果您要为AJAX-enabled control（位于RadAjaxPanel or ajaxified by RadAjaxManager中）的文件调用下载，则无法使用普通response.WriteFile function。

Response.WriteFile("~/filename");

因为XmlHttpRequest无法处理此问题。

修改

Please check this link for alternative

ASPX代码：

<div> <telerik:RadScriptManager ID="RadScriptManager1" runat="server"> </telerik:RadScriptManager> <telerik:RadWindowManager ID="RadWindowManager1" runat="server"> </telerik:RadWindowManager> <asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Always"> <ContentTemplate> <telerik:RadGrid ID="RadGrid1" runat="server" AutoGenerateColumns="false" OnItemCommand="RadGrid1_ItemCommand" OnNeedDataSource="RadGrid1_NeedDataSource" OnItemDataBound="RadGrid1_ItemDataBound"> <MasterTableView Width="950" AutoGenerateColumns="false" DataKeyNames="ID" GridLines="None" TableLayout="Auto"> <Columns> <telerik:GridBoundColumn DataField="ID" HeaderText="Emp ID" ReadOnly="true" HeaderStyle-HorizontalAlign="Left" ItemStyle-HorizontalAlign="Left" UniqueName="ID" FilterControlWidth="30px" AutoPostBackOnFilter="true" CurrentFilterFunction="Contains" /> <telerik:GridButtonColumn DataTextField="Name" ItemStyle-ForeColor="Blue" CommandName="Generate" ConfirmTextFields="Name" ConfirmTextFormatString="Would you like to {0} ACH file ?" ConfirmDialogType="RadWindow" Reorderable="false" UniqueName="ButtonName" ConfirmTitle="ACH File"> </telerik:GridButtonColumn> </Columns> </MasterTableView> </telerik:RadGrid> </ContentTemplate> </asp:UpdatePanel> </div>

代码背后：

protected void RadGrid1_NeedDataSource(object sender, GridNeedDataSourceEventArgs e) { dynamic data = new[] { new { ID = 1, Name ="Name_1"}, new { ID = 2, Name = "Name_2"}, new { ID = 3, Name = "Name_3"}, new { ID = 4, Name = "Name_4"}, new { ID = 5, Name = "Name_5"} }; RadGrid1.DataSource = data; } protected void RadGrid1_ItemDataBound(object sender, GridItemEventArgs e) { if (e.Item is GridDataItem) { GridDataItem item = e.Item as GridDataItem; ScriptManager.GetCurrent(Page).RegisterPostBackControl(item["ButtonName"].Controls[0]); } } protected void RadGrid1_ItemCommand(object sender, Telerik.Web.UI.GridCommandEventArgs e) { if (e.CommandName == "Generate") { Response.ContentType = "text/plain"; Response.AppendHeader("Content-Disposition", "attachment;filename= errorLog.txt"); Response.AddHeader("content-length", "0"); Response.Flush(); Response.End(); } }

Answer 2

我已经应用了一个解决方案，可以在成功插入/更新记录时重新加载页面，如下所示：

protected void grid_ItemInserted(object source, GridInsertedEventArgs e)
    {
        if (e.Exception == null)
        {
            if (Session["FileUploaded"] != null)
                Response.Redirect(Request.RawUrl);
        }
    }

Answer 3

出于记录的目的，我想针对我遇到的问题发布这个答案。我找到了解决这个问题的方法。似乎 RadAjaxManager 存在问题所以我将其替换为 RadAjaxPanel ，这对我来说非常适合。

下载radgrid中的功能问题

3 个答案: