Can't get Combobox Object

[Web Services]

I have a combo box within a rad panel bar. I am trying to redirect based on if the user selects something within it. However, right now I'm just getting a JS alert saying object not set to the instance of an object. Here is the relevant code. You can see what I mean at alpha.clickablecommunity.com the page should redirect to calendar.aspx when the user selects that from the dropdown.

    Protected Sub viewDrop_SelectedIndexChanged(ByVal o As Object, ByVal e As Telerik.Web.UI.RadComboBoxSelectedIndexChangedEventArgs)
        Dim dropdown As RadComboBox = DirectCast(RadPanelBar1.FindItemByText("Places to Go").Items(0).FindControl("veiwDrop"), RadComboBox)
        
        If dropdown.SelectedValue = "calendar" Then
            Response.Redirect("Calendar.aspx")
        End If
                
    End Sub
</script>

And the aspx I didn't paste it all but the panel bar works fine.

<link href="../ClickableCommunity.css" rel="stylesheet" type="text/css" />
<telerik:RadAjaxPanel ID="RadAjaxPanel1" runat="server" LoadingPanelID="RadAjaxLoadingPanel1" Width="220px" Height="520px" BorderStyle="None">
    <telerik:RadPanelBar ID="RadPanelBar1" runat="server" Skin="Web20"
        AllowCollapseAllItems="false" Width="220px" BorderStyle="None" OnClientItemClicked="itemClicked"
        ExpandMode="FullExpandedItem" Height="100%">
        <CollapseAnimation Type="None" Duration="100"></CollapseAnimation>
        <Items>
            <telerik:RadPanelItem runat="server" Text="Places to Go" Font-Bold="true" Font-Size="Medium" Expanded="true" BorderStyle="None">
                <Items>
                    <telerik:RadPanelItem runat="server" BorderStyle="None">
                        <ItemTemplate>
                            View: &nbsp;&nbsp;&nbsp;
                            <telerik:RadComboBox ID="viewDrop" runat="server" Skin="Web20" Width="100px" MarkFirstMatch="True"
                        Font-Size="12px" EnableVirtualScrolling="True" OnSelectedIndexChanged="viewDrop_SelectedIndexChanged" AutoPostBack="true">
                        <CollapseAnimation Duration="1000" Type="InOutBack" />
                        <Items>
                            <telerik:RadComboBoxItem Value="map" Text="Map" Selected="true" />
                            <telerik:RadComboBoxItem Value="calendar" Text="Calendar" Selected="true" />
                        </Items>
                    </telerik:RadComboBox>
                            <telerik:RadTreeView ID="attractionsTree" runat="server" Skin="Web20" CssClass="leftPanelContent"
                                CheckBoxes="true" OnClientNodeClicking="OnClientNodeClicking" OnClientNodeChecked="OnClientNodeChecked" >
                            </telerik:RadTreeView>
                        </ItemTemplate>
                    </telerik:RadPanelItem>
                </Items>
            </telerik:RadPanelItem>

[Shinu]

Hello,

Its working fine when I tried the same at my end. From your code, I found that you have mis-spelled the control ID and it's not the same as given in declaration. Could you change the code as shown below and see whether it is working fine?

Protected Sub viewDrop_SelectedIndexChanged(ByVal o As Object, ByVal e As Telerik.Web.UI.RadComboBoxSelectedIndexChangedEventArgs)

        Dim dropdown As RadComboBox = DirectCast(RadPanelBar1.FindItemByText("Places to Go").Items(0).FindControl("viewDrop"), RadComboBox)

        If dropdown.SelectedValue = "calendar" Then
            Response.Redirect("Calendar.aspx")
        End If
End Sub

Also you can access the RadComboBox using following approach.

Protected Sub viewDrop_SelectedIndexChanged(ByVal o As Object, ByVal e As RadComboBoxSelectedIndexChangedEventArgs)
    Dim combo As RadComboBox = DirectCast(o, RadComboBox)
End Sub

-Shinu.

[Paul]

Hello Web Services,

I guess you have a small typo in the combobox ID:

<form id="form1" runat="server">
    <telerik:RadScriptManager runat="server" ID="RadScriptManager1">
    </telerik:RadScriptManager>
    <telerik:RadAjaxPanel ID="RadAjaxPanel1" runat="server" LoadingPanelID="RadAjaxLoadingPanel1"
        Width="220px" Height="520px" BorderStyle="None">
        <telerik:RadPanelBar ID="RadPanelBar1" runat="server" Skin="Web20" AllowCollapseAllItems="false"
            Width="220px" BorderStyle="None" _OnClientItemClicked="itemClicked" ExpandMode="FullExpandedItem"
            Height="100%">
            <CollapseAnimation Type="None" Duration="100"></CollapseAnimation>
            <Items>
                <telerik:RadPanelItem runat="server" Text="Places to Go" Font-Bold="true" Font-Size="Medium"
                    Expanded="true" BorderStyle="None">
                    <Items>
                        <telerik:RadPanelItem runat="server" BorderStyle="None" Value="templateHolder">
                            <ItemTemplate>
                                View:
                                <telerik:RadComboBox ID="viewDrop" runat="server" Skin="Web20" Width="100px" MarkFirstMatch="True"
                                    Font-Size="12px" EnableVirtualScrolling="True" OnSelectedIndexChanged="viewDrop_SelectedIndexChanged"
                                    AutoPostBack="true">
                                    <CollapseAnimation Duration="1000" Type="InOutBack" />
                                    <Items>
                                        <telerik:RadComboBoxItem Value="map" Text="Map" Selected="true" />
                                        <telerik:RadComboBoxItem Value="calendar" Text="Calendar" Selected="true" />
                                    </Items>
                                </telerik:RadComboBox>
                                <telerik:RadTreeView ID="attractionsTree" runat="server" Skin="Web20" CssClass="leftPanelContent"
                                    CheckBoxes="true" _OnClientNodeClicking="OnClientNodeClicking" _OnClientNodeChecked="OnClientNodeChecked">
                                </telerik:RadTreeView>
                            </ItemTemplate>
                        </telerik:RadPanelItem>
                    </Items>
                </telerik:RadPanelItem>
            </Items>
        </telerik:RadPanelBar>
    </telerik:RadAjaxPanel>
    </form>

Imports Telerik.Web.UI

Partial Class Default2
    Inherits System.Web.UI.Page

    Protected Sub viewDrop_SelectedIndexChanged(ByVal o As Object, ByVal e As Telerik.Web.UI.RadComboBoxSelectedIndexChangedEventArgs)
        Dim dropdown As RadComboBox = DirectCast(RadPanelBar1.FindItemByText("Places to Go").Items(0).FindControl("viewDrop"), RadComboBox)

        If dropdown.SelectedValue = "calendar" Then
            Response.Redirect("Calendar.aspx")
        End If
    End Sub
End Class

Best wishes,
Paul
the Telerik team

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[Web Services]

Sorry for wasting your time. I posted this late in the day yesterday. Thanks,