need to add AsyncPostBackTrigger

[prayag ganoje]

Hello,

I am following the my portal demo. I have created app with similar functionality.

I have combobox with treeview embeded in it. On clicking tree nodes I add the Docks to the raddockzone.

Now I want to add "AsyncPostBackTrigger " to the treeview  which is inside the combobox so that when I hit "NodeClick" event then rest of the docks should not load again. Oly newly added dock should get impacted.

If I try to add the AsyncPostBackTrigger to Node click then I get the following error.

A control with ID 'RadTreeViewCustSupportReports' could not be found for the trigger in UpdatePanel 'UpdatePanel1'.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.InvalidOperationException: A control with ID 'RadTreeViewCustSupportReports' could not be found for the trigger in UpdatePanel 'UpdatePanel1'.

Treeview inside the combobox:

<telerik:RadComboBox ID="RadComboReports" runat="server" AllowCustomText="true" EmptyMessage="-- Select Report --"
                           Height="300px" ShowToggleImage="True" Skin="Default" Width="275px">
                           <ItemTemplate>
                               <div id="div1">
                                   <telerik:RadTreeView ID="RadTreeViewCustSupportReports" runat="server" OnNodeClick="RadTreeViewCustSupportReports_NodeClick"
                                       Skin="Vista" Width="100%">
                                       <Nodes>
                                           <telerik:RadTreeNode runat="server" ImageUrl="~/Images/chart_pie.png" Text="Avg Response Time"
                                               Value="~/Internal/Dashboard/Reports/CSMD_Average_Response_Time.ascx">
                                           </telerik:RadTreeNode>
                                           <telerik:RadTreeNode runat="server" ImageUrl="~/Images/chart_pie.png" Text="Avg Resolution Time Frontline"
                                               Value="~/Internal/Dashboard/Reports/CSMD_Average_Resolution_Time_FL.ascx">

Update panel where raddoclayout is placed:

<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional" ChildrenAsTriggers="false">
    <ContentTemplate>
        <Martinbeeby:RadDockLayoutNew ID="RadDockLayout1" runat="server" OnLoadDockLayout="RadDockLayout1_LoadDockLayout"
            OnSaveDockLayout="RadDockLayout1_SaveDockLayout">
            <table style="width: 100%; padding-top: 4px;" cellpadding="0" cellspacing="0" border="0">
                <tr align="left" style="padding-bottom: 0px; padding-top: 0px; padding-left: 0px;
                    padding-right: 0px;">
                    <td style="vertical-align: top; width: 267px; padding-left: 0px; padding-right: 0px;">
                        <Martinbeeby:RadDockZoneNew ID="RadDockZone1" runat="server" MinHeight="500px" Width="267px"
                            BorderStyle="None">

AsyncPostBackTrigger:

</Martinbeeby:RadDockLayoutNew>
            </ContentTemplate>
            <Triggers>
            <asp:AsyncPostBackTrigger ControlID="RadTreeViewCustSupportReports" EventName="NodeClick" />
            </Triggers>
        </asp:UpdatePanel>

How to add this trigger ?

[Dobromir]

Hi Prayag,

This error occurs because the RadComboBox is a naming container and the TreeView's modified. To avoid this problem you need to create the trigger dynamically and provide the UniqueID of the RadTreeView to the its ControlID property.

Best wishes,
Dobromir
the Telerik team