ASP.NET AJAX 问题

Question

我已经更新了一些代码以使用 Ajax Control 工具包 0911 beta，由于某种原因，在后面的代码中动态添加可折叠面板扩展器的代码现在会导致客户端 jscript 中出现以下错误...

Microsoft JScript 运行时错误：Sys.ArgumentException ：控件和行为的值不能为空。 参数名称：元素

在...

$create = Sys.Component.create = function Sys$Component$create(type, properties, events, references, element) {
    /// <summary locid="M:J#Sys.Component.create" />
    /// <param name="type" type="Type"></param>
    /// <param name="properties" optional="true" mayBeNull="true"></param>
    /// <param name="events" optional="true" mayBeNull="true"></param>
    /// <param name="references" optional="true" mayBeNull="true"></param>
    /// <param name="element" domElement="true" optional="true" mayBeNull="true"></param>
    /// <returns type="Object"></returns>
    var e = Function._validateParams(arguments, [
        {name: "type", type: Type},
        {name: "properties", mayBeNull: true, optional: true},
        {name: "events", mayBeNull: true, optional: true},
        {name: "references", mayBeNull: true, optional: true},
        {name: "element", mayBeNull: true, domElement: true, optional: true}
    ]);
    if (e) throw e;
    if (type.inheritsFrom(Sys.UI.Behavior) || type.inheritsFrom(Sys.UI.Control)) {
        if (!element) throw Error.argument('element', Sys.Res.createNoDom);
    }

我承认这只是一个测试版，但我无法找到解决方法，甚至无法理解这个非常简单的代码不再起作用的原因。

代码

private Panel GetReportPanel(DataRow dr, ReportParameter[] Params)
{
    Panel pnlReport = new Panel();
    pnlReport.ID = Uri.EscapeDataString(dr["ReportName"].ToString()) + "_MainReportContainer";

    //Report Title Section
    var pnlReportTitle = new Panel();
    pnlReportTitle.CssClass = "ReportSectionTitle";
    var tblReportTitle = new Table();
    var trowReportTitle = new TableRow();
    var tcellReportTitle = new TableCell();
    var imgReportTitleExpand = new Image();
    imgReportTitleExpand.ID = Uri.EscapeDataString("img" + dr["ReportName"].ToString() + "DataExpand");
    tcellReportTitle.Controls.Add(imgReportTitleExpand);
    trowReportTitle.Controls.Add(tcellReportTitle);
    tcellReportTitle = new TableCell();
    var lblReportTitle = new Label();
    lblReportTitle.ID = Uri.EscapeDataString("lnk" + dr["ReportName"].ToString());
    lblReportTitle.Text = "Functional " + dr["ReportName"].ToString();
    tcellReportTitle.Controls.Add(lblReportTitle);
    trowReportTitle.Controls.Add(tcellReportTitle);
    tblReportTitle.Controls.Add(trowReportTitle);
    pnlReportTitle.Controls.Add(tblReportTitle);
    pnlReport.Controls.Add(pnlReportTitle);

    //Report Section
    var pnlReportSection = new Panel();
    pnlReportSection.ID = Uri.EscapeDataString("pnlReportSection" + dr["ReportName"].ToString());
    pnlReportSection.CssClass = "ReportSection";
    pnlReportSection.ScrollBars = ScrollBars.None;
    var pnlInnerReportSection = new Panel();
    pnlInnerReportSection.CssClass = "ReportSection";
    var rptControl = new ReportViewer();
    rptControl.ID = "rpt" + dr["ReportName"].ToString().Replace(' ', '_');
    rptControl.ProcessingMode = ProcessingMode.Remote;
    rptControl.Width = new Unit("100%");
    rptControl.ShowDocumentMapButton = false;
    rptControl.ShowParameterPrompts = false;
    rptControl.Visible = true;
    rptControl.Height = new Unit("500px");
    rptControl.AsyncRendering = (bool)dr["ASyncRenderingEnabled"];
    rptControl.ServerReport.ReportPath = dr["SSRSReportPath"].ToString();
    rptControl.ServerReport.ReportServerUrl = new Uri("http://horoap336/reportserver");
    rptControl.ServerReport.SetParameters(Params);

    pnlInnerReportSection.Controls.Add(rptControl);
    pnlReportSection.Controls.Add(pnlInnerReportSection);
    pnlReport.Controls.Add(pnlReportSection);

    //Collapsable Panel Extender
    var Extender = new AjaxControlToolkit.CollapsiblePanelExtender();

    Extender.TargetControlID = pnlReportSection.ID;
    Extender.ID = Uri.EscapeDataString(dr["ReportName"].ToString()) + "_Extender";
    Extender.CollapsedSize = 0;
    Extender.Collapsed = true;
    Extender.ExpandControlID = lblReportTitle.ID;
    Extender.CollapseControlID = lblReportTitle.ID;
    Extender.AutoCollapse = false;
    Extender.AutoExpand = false;
    Extender.ScrollContents = false;
    Extender.TextLabelID = lblReportTitle.ID;
    Extender.CollapsedText = "Functional " + dr["ReportName"].ToString() + " (Click To Show Details...)";
    Extender.ExpandedText = "Functional " + dr["ReportName"].ToString() + " (Click To Hide Details...)";
    Extender.ImageControlID = imgReportTitleExpand.ID;
    Extender.ExpandedImage = "~/images/collapse.jpg";
    Extender.CollapsedImage = "~/images/expand.jpg";

    Extender.ExpandDirection = AjaxControlToolkit.CollapsiblePanelExpandDirection.Vertical;

    pnlReport.Controls.Add(Extender);

    return pnlReport;

}

然后使用... Aspx 文件将该面板添加到 aspx 文件中的面板

 pnlContainer.Controls.Add(GetReportPanel(dr,Params)); 

...

<%@ Page Title="Operations MI Dashboard - Functional Reporting" Language="C#" MasterPageFile="~/MasterPage.master" AutoEventWireup="true" CodeFile="FunctionalReport.aspx.cs" Inherits="TelephonyReport" %>
<%@ Register Assembly="Microsoft.ReportViewer.WebForms, Version=9.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"
    Namespace="Microsoft.Reporting.WebForms" TagPrefix="rsweb" %>

<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">

</asp:Content>

<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
    <asp:Panel ID="pnlContainer" runat="server">

    </asp:Panel>
</asp:Content>

所以，我的问题是：

• 我的代码是否存在问题 仅在后来的版本中明显 工具包的？
• 有谁知道 我可以尝试的解决方法吗？
• 谁能解释为什么这个问题 仅在最新版本中发生？

Answer 1

好的，所以我最终通过反复试验解决了这个问题:)

由于某种原因，使用 Uri.EscapeDataString() 删除控件名称中的空格导致控件无法识别。

通过更改代码使用 string.Replace(' ','_') 现在可以工作了。然而，这确实意味着只有空格被转义，但这对于这个解决方案来说已经足够好了。