Question

在我的母版页中，我有ContentPlaceHolder用于左侧内容，正确的内容见下文：

<body class="software">
    <form id="form1" name="MyFrom" runat="server"> 
    <telerik:RadScriptManager runat="server" ID="RadScriptManager1" ></telerik:RadScriptManager>    
        <div>
            <div id="wrapper">
                <menu:main id="mainMenu" runat="server"/>
                <div id="leftCol">
                    <asp:ContentPlaceHolder ID="LeftContent" runat="server">
                    </asp:ContentPlaceHolder>
                </div>                               
                <div id="rightCol">                                                 
                    <asp:ContentPlaceHolder ID="RightContent" runat="server">
                    </asp:ContentPlaceHolder>
                </div>      
            </div>
        </div>        
    </form>
</body>

在我的aspx页面上，我在TreeView的每个节点的左侧都有TreeView我想加载一个不同的ascx，它只会改变页面的右侧我想设置可见的false并加载其他ascx问题它给我一个错误：对象引用未设置为对象的实例。

如何以正确的方式访问页面上的ascx ???

Me.Master.FindControl("RightContent").Page.FindControl("/Controls/Reports/rptReport.ascx").Visible = False

这就是我在rptReport.ascx上的内容：

<%--Right Side--%>
<div id="rightCol" >
    <div class="elementHeader" id="elementHeader">
        <span class="text"><asp:Label ID="lblReports" runat="server" Text="Reports"></asp:Label></span>
    </div>   
    <div id="divRightWrapper" class="rightWrapperDiv" runat="server">
    <div>
        <img id="imgCaseGlobalReports" runat="server" alt="" src="~/Images/Replacements/IncidentReports.png"/>
    </div>

    </div>
 </div>

我想隐藏并加载不同的ascx

aspx.vb：

       Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

            RetrieveAllQueryStringParams()

            If Not IsPostBack Then
                GenerateDataSets()
                GenerateLabels()
                GenerateLinks()
                GenerateControls()
                GenerateOther()
            End If

        End Sub

        Private Sub RetrieveAllQueryStringParams()
            Try
                If Not String.IsNullOrEmpty(Request.QueryString("SessionID")) Then
                    m_SessionID = Request.QueryString("SessionID")
                    m_qrptTOD = Request.QueryString("qrptTOD")
                ElseIf Not String.IsNullOrEmpty(Session("SessionID")) Then
                    m_SessionID = Session("SessionID")
                End If


                If m_qrptTOD = "tod" Then

                    Me.Master.FindControl("RightContent").Page.FindControl("/Controls/Reports/rptReport.ascx").Visible = False

                    Me.Master.FindControl("RightContent").Controls.Add(Page.LoadControl(("/Controls/Reports/rptTimeOfDay.ascx")))
                End If



            Catch ex As Exception

            End Try
        End Sub

 Protected Sub GenerateLinks()
        Dim subTreeStatisticalReport As RadTreeNode = rtvReports.Nodes.FindNodeByValue("StatisticalReport")
        Dim subTreeIncidentComparisons As RadTreeNode = rtvReports.Nodes.FindNodeByValue("IncidentComparisons")
        Dim subTreeGeographicLocations As RadTreeNode = rtvReports.Nodes.FindNodeByValue("GeographicLocations")

        Dim statTimeOfDayNode As RadTreeNode = subTreeStatisticalReport.Nodes.FindNodeByValue("TimeofDay")
        Dim statTrendsNode As RadTreeNode = subTreeStatisticalReport.Nodes.FindNodeByValue("Trends")
        Dim statTopSevenIncidents As RadTreeNode = subTreeStatisticalReport.Nodes.FindNodeByValue("Top7Incidents")
        Dim statIncidentPerCategory As RadTreeNode = subTreeStatisticalReport.Nodes.FindNodeByValue("IncidentsPerCategory")
        Dim compIncidentLoss As RadTreeNode = subTreeIncidentComparisons.Nodes.FindNodeByValue("IncidentLoss")
        Dim GeoMaps As RadTreeNode = subTreeGeographicLocations.Nodes.FindNodeByValue("Maps")




        statTimeOfDayNode.NavigateUrl = Globals.gRootRelativeSecureURL("/Reports/Reports.aspx?SessionID=" + m_SessionID + "&qrptTOD=tod")
    End Sub

在aspx.page中设置ascx的可见性

0 个答案: