包括以下是我的,因爲我已經使用FineUploader控件的頁面標記。我刪減了代碼,只包含了重要的部分。該頁面分爲兩部分,它們都位於UpdatePanel中。第一部分是一個包含數據行的簡單表格,每行的最後一列是一個asp:LinkButton。第二部分是包含在其中第一加載頁面時的FineUploader控制呈現(因爲FineUploader控制是嚴格的JavaScript和不會在代碼隱藏進一步存在)一個div嵌套的UpdatePanel。此外,按下LinkButton時this.Page.IsPostBack
爲false
。UpdatePanel的問題只控制
的問題是,在頁面的第一部分一個LinkButton按下任何時候,FineUploader控制簡單地消失。我無法從代碼隱藏中重新呈現代碼(例如ClientScript.RegisterStartupScript/RegisterClientScriptBlock
)。我也嘗試過用UpdatePanel封裝第1部分的各種設置,但它仍然消除了我的FineUploader控件。我想我錯誤地使用更新面板,但我不確定(ASP.NET通常不是我工作的)。
作爲一個額外的細節,如果我點擊第2部分嵌套UpdatePanel內的按鈕,我FineUploader控制奇蹟般地再次出現。
標記(能見度重要的部分都標有多線路,大部分是空的註釋塊):
<%@ Page Title="" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="Setup.aspx.cs" Inherits="Some_Portal.Pages.Setup" %>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server">
<div id="locationInfo">
<br class="clearfloat" />
<!-- Main Screen Display breaking down the types of information -->
<asp:UpdatePanel runat="server" ID="updExtensions">
<Triggers>
<asp:PostBackTrigger ControlID="btnDownloadCall" />
</Triggers>
<ContentTemplate>
<script type='text/javascript' src='http://code.jquery.com/jquery-1.7.1.js'></script>
<style type='text/css'>
.filename {
visibility: hidden;
height: 0;
width: 0;
display: block;
}
</style>
<!-- This portion is to enable the file uploader: -->
<link href="../js/fineuploader/fineuploader-3.5.0.css" rel="stylesheet">
<script type="text/javascript" src="../js/fineuploader/fineuploader-3.5.0.js"></script>
<script type="text/javascript">
$(document).ready(function() {
var uploader = new qq.FineUploader({
element: $('#fine-uploader')[0],
request: {
endpoint: 'AccountSetup.aspx'
},
autoUpload: true,
multiple: false,
text: {
uploadButton: '<asp:Button ID="fineUploadButton" runat="server" CssClass="button" style="width:6;5" Text="Browse" />'
},
validation: {
allowedExtensions: ['mp3', 'wav']
}
});
});
</script>
<!-- -->
<!-- -->
<!-- Part 1 -->
<!-- -->
<!-- -->
<table width="100%" cellpadding="0" border="0px" style="border-color:white;">
<tr>
<th>Extensions</th>
</tr>
<tr>
<td style="width: 100%; border:0; border-bottom-color:white; border-bottom-style:none;">
<asp:DataGrid ID="dgExtensions" runat="server" AllowSorting="true" AllowPaging="true" PagerStyle-BorderStyle="None" PagerStyle-BorderColor="white" PagerStyle-BorderWidth="0px"
AutoGenerateColumns="false" PageSize="10" DataKeyField="id" OnPageIndexChanged="dgExtensions_OnPageIndexChanged"
PagerStyle-Mode="NumericPages" PagerStyle-HorizontalAlign="Right" OnSortCommand="dgExtensions_OnSortCommand"
Width="100%" BorderColor="White"
HeaderStyle-CssClass="GridHeader"
ItemStyle-CssClass="GridItem"
AlternatingItemStyle-CssClass="GridAltItem">
<Columns>
<asp:BoundColumn DataField="number" HeaderText="Number" SortExpression="number">
<ItemStyle HorizontalAlign="center" Width="8%" />
<HeaderStyle HorizontalAlign="center" Width="8%" />
</asp:BoundColumn>
<asp:BoundColumn DataField="extensionType" HeaderText="Type" SortExpression="extensionType">
<ItemStyle HorizontalAlign="center" Width="18%" />
<HeaderStyle HorizontalAlign="center" Width="18%" />
</asp:BoundColumn>
<asp:TemplateColumn HeaderText="Description" SortExpression="description">
<HeaderStyle Width="25%" CssClass="dgLeftPad" />
<ItemStyle Width="25%" CssClass="dgLeftPad" />
<ItemTemplate>
<asp:Literal runat="Server" ID="litExtensionDescription" Text='<%# Eval("description").ToString() %>' />
<asp:HiddenField runat="server" ID="hidExtensionID" Value='<%# Eval("id").ToString() %>' />
<asp:HiddenField runat="server" ID="hidExtensionTypeID" Value='<%# Eval("extensiontypeid").ToString() %>' />
<asp:HiddenField runat="server" ID="hidPrevDescription" Value='<%# Eval("description").ToString() %>' />
</ItemTemplate>
</asp:TemplateColumn>
<asp:BoundColumn DataField="status" HeaderText="Status" SortExpression="status">
<ItemStyle HorizontalAlign="center" Width="24%" />
<HeaderStyle HorizontalAlign="center" Width="24%" />
</asp:BoundColumn>
<asp:TemplateColumn HeaderText="">
<HeaderStyle Width="10%" />
<ItemStyle Width="10%" HorizontalAlign="center" />
<ItemTemplate>
<!-- -->
<!-- -->
<!-- Clicking this makes the Fine -->
<!-- Uploader control go away. -->
<!-- -->
<!-- -->
<asp:LinkButton runat="Server" ID="lbEditExtension" CommandArgument='<%# Eval("id").ToString() %>'
OnCommand="EditExtension" Text="Edit" Visible='<%# SetEditEnabled(Eval("extensiontypeid").ToString()) %>'/>
</ItemTemplate>
</asp:TemplateColumn>
</Columns>
<HeaderStyle BackColor="#eeeeee" />
<PagerStyle HorizontalAlign="Right" Mode="NumericPages" />
</asp:DataGrid>
</td>
</tr>
<tr>
<asp:Panel runat="server" ID="pnlNoExtensions">
<td colspan="3" align="center" style="color: Red;">
There are no extensions established for your account
</td>
</asp:Panel>
</tr>
</table>
<br />
<!-- -->
<!-- -->
<!-- Part 2 -->
<!-- -->
<!-- -->
<asp:Panel runat="server" ID="Panel1" Width="100%">
<asp:UpdatePanel runat="server" ID="updRouteGroup" UpdateMode="Conditional">
<Triggers>
<asp:PostBackTrigger ControlID="btnDisableOnHold" />
</Triggers>
<ContentTemplate>
<asp:Panel ID="pnlImpExcel" runat="Server" >
<div style="width:100%">
<table colspan="0" width="100%" cellpadding="0" cellspacing="0">
<tr>
<th colspan="3">
On Hold Music
</th>
</tr>
<tr>
<!-- -->
<!-- FineUploader Control -->
<!-- -->
<td align="left" valign="middle"><div id="fine-uploader"></div></td>
<td align="center" valign="middle"><asp:Label ID="lblOnHoldFile" runat="server" Text="Current file: none"/></td>
<td align="right" valign="middle"><asp:Button ID="btnDisableOnHold" runat="server" style="margin-right:7px;width:87px;" Text="Disable Hold Music" CssClass="button" OnClick="btnDisableOnHold_OnClick" /></td>
</tr>
<tr><td colspan ="2" align="center"><asp:Label runat="server" ID="lblUploadError" style="color: Red;" Visible="false" /></td></tr>
</table>
</div>
</asp:Panel>
</ContentTemplate>
</asp:UpdatePanel>
</asp:Panel>
<!-- The Operator Extension Panel -->
<asp:Panel runat="server" ID="Panel2">
<asp:UpdatePanel runat="server" ID="UpdatePanel1" UpdateMode="Conditional">
<Triggers>
<asp:PostBackTrigger ControlID="btnOperatorUpdate" />
</Triggers>
<ContentTemplate>
<asp:Panel ID="Panel3" runat="Server" >
<div>
<table colspan="0" width="100%" cellpadding="0" cellspacing="0">
<tr>
<th colspan="3">
Operator Extension
<asp:Button ID="btnOperatorUpdate" runat="server" Text="Save" CssClass="button" style="margin-right:2px;width:87px;float:right;padding-right:10px;" OnClick="btnOperatorUpdate_OnClick" />
<asp:DropDownList runat="Server" ID="ddlOperatorExtension" style="float:right;margin-right:10px;" Width="250px" AutoPostBack="false" />
</th>
</tr>
</table>
<br />
</div>
</asp:Panel>
</ContentTemplate>
</asp:UpdatePanel>
</asp:Panel>
</ContentTemplate>
</asp:UpdatePanel>
</div>
</asp:Content>
我怎樣才能讓我的FineUploader控制保持可見?
編輯1: 考慮到這可能是一個頁面生命週期的問題,我試圖通過添加以下控制的手動渲染:
protected void Page_Init(object sender, EventArgs e)
{
string script = "<script type=\"text/javascript\">" +
" alert('oh hey');" +
" $(document).ready(function() {" +
" var uploader = new qq.FineUploader({" +
" element: $('#fine-uploader')[0]," +
" request: {" +
" endpoint: 'AccountSetup.aspx'" +
" }," +
" autoUpload: true," +
" multiple: false," +
" text: {" +
" uploadButton: '<asp:Button ID=\"fineUploadButton\" runat=\"server\" CssClass=\"button\" style=\"width:6;5\" Text=\"Browse\" />'" +
" }," +
" validation: {" +
" allowedExtensions: ['mp3', 'wav']" +
" }" +
" });" +
" });" +
"</script>";
ClientScript.RegisterClientScriptBlock(this.GetType(), "HideOnPostback", script, false);
System.Diagnostics.Debug.WriteLine("Page_Init() run");
}
其結果是,如果我點擊「編輯」的LinkButton在第1部分中,我在調試輸出中看到「Page_Init()運行」,但控件仍然消失,並且「哦,嘿嘿」js警報從不顯示。但是,如果我單擊第2部分中的其他按鈕,則會在調試輸出中看到「Page_Init()運行」,我看到「哦,嘿」警報,FineUploader按鈕仍然可見。
我試圖與相同的結果,當我把在'Page_Load'。我在編輯中添加了更多的細節以解決我原來的問題。 – kmarks2
你在ScriptManager上設置EnablePartialRendering =「true」嗎?如果你這樣做,如果你圍繞第1部分的LinkButton封裝更新面板會發生什麼? – LoganGoesPlaces
另一個可能的問題是控件ID在重新創建時需要保持不變。看起來你沒有這個問題,但它可能值得檢查,如果一切都失敗了。 – LoganGoesPlaces