[英]Downloading functionality issue in radgrid
我有一個棘手的問題,希望我能很好地解釋。
這是我的問題:我有一個用於添加/編輯行的radgrid FormTemplate ,其中使用RadAsyncUpload控件上傳文件。 該文件已成功插入並更新。 另外,我在radgrid視圖中配置了一個鏈接按鈕,以便在需要時下載文件。
現在問題出在這里:在上傳文件后立即嘗試從radgrid視圖下載時,我無法下載它。 相反,我需要先重新加載頁面,然后才能下載文件。 可能是什么問題呢? 我還使用了grid.rebind()方法,但這不起作用。 以下是我的代碼的簡要區域:
<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>
<asp:Button ID="btnCancel" CssClass="btn" Text="Cancel" runat="server" CausesValidation="False"
CommandName="Cancel"></asp:Button>
</FormTemplate>
</EditFormSettings>
如果要從AJAX-enabled control
(放置在RadAjaxPanel or ajaxified by RadAjaxManager
)調用文件下載,則不能使用常規的response.WriteFile function
。
Response.WriteFile("~/filename");
因為XmlHttpRequest
無法處理此問題。
編輯:
ASPX代碼:
<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>
背后的代碼:
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();
}
}
每當記錄成功插入/更新時,我都會應用一種解決方案來重新加載頁面,如下所示:
protected void grid_ItemInserted(object source, GridInsertedEventArgs e)
{
if (e.Exception == null)
{
if (Session["FileUploaded"] != null)
Response.Redirect(Request.RawUrl);
}
}
出於記錄目的,我想針對我遇到的問題發布此答案。 我找到了解決此問題的方法。 RadAjaxManager似乎有問題,所以我用RadAjaxPanel替換了它, 它對我來說很完美。
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