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Initiate TreeView.LoadXml from ToolbarButton

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TreeView

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3 Answers, 1 is accepted

answered on 14 Aug 2009, 08:57 AM

Hi Albert,

i mixed up the Support of standard ASP.NET TreeView . So now I see, that the controls supports AJAX funcionality.

But I've still problems with the Toolbar and the TreeView.

I want that a click on a RadToolbarButton updates the RadTreeView. So I started the RadAjaxManager SmartWizard. There I found the RadToolbarButton with id 'i0' (Other ToobarButtons use the same id).
Now I select the TreeView as Update Target.

After starting the application i get the Errormessage (Sorry the message is in German):

    
            Die Steuerelementeauflistung kann nicht geändert werden, da das Steuerelement Codeblöcke enthält (z.B. <% ... %>).  
        
            Beschreibung: Unbehandelte Ausnahme beim Ausführen der aktuellen Webanforderung. Überprüfen Sie die Stapelüberwachung, um weitere Informationen über diesen Fehler anzuzeigen und festzustellen, wo der Fehler im Code verursacht wurde.  
        
            Ausnahmedetails: System.Web.HttpException: Die Steuerelementeauflistung kann nicht geändert werden, da das Steuerelement Codeblöcke enthält (z.B. <% ... %>). 
        
            Quellfehler:  
        
            Beim Ausführen der aktuellen Webanforderung wurde einen unbehandelte Ausnahme generiert. Informationen über den Ursprung und die Position der Ausnahme können mit der Ausnahmestapelüberwachung angezeigt werden.   
        
            Stapelüberwachung:  
        
            [HttpException (0x80004005): Die Steuerelementeauflistung kann nicht geändert werden, da das Steuerelement Codeblöcke enthält (z.B. <% ... %>).] 
        
               System.Web.UI.ControlCollection.AddAt(Int32 index, Control child) +8664706 
        
               Telerik.Web.UI.RadAjaxControl.MoveUpdatePanel(Control initiator, Control updated) +214 
        
            [HttpException (0x80004005): Please, see whether wrapping the code block, generating the exception, within RadCodeBlock resolves the error.] 
        
               Telerik.Web.UI.RadAjaxControl.MoveUpdatePanel(Control initiator, Control updated) +279 
        
               Telerik.Web.UI.RadAjaxControl.PerformRender() +502 
        
               Telerik.Web.UI.RadAjaxControl.OnPageRender(HtmlTextWriter writer, Control page) +1849 
        
               Telerik.Web.UI.RadAjaxControl.RenderPageInAjaxMode(HtmlTextWriter writer, Control page) +158 
        
               System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +256 
        
               System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +19 
        
               System.Web.UI.Page.Render(HtmlTextWriter writer) +29 
        
               System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27 
        
               System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99 
        
               System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25 
        
               System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1266 
        
            -------------------------------------------------------------------------------- 
        
            Versionsinformationen: Microsoft .NET Framework-Version:2.0.50727.3053; ASP.NET-Version:2.0.50727.3053

My JavaScript Functions are located in a RadCodeBlock to prevent errors when using (<%=xyzControl.ClientID %>) inside JavaScriptfunctions.

My TreeView looks like this:

    
            <div id="div_RadTreeViewDataFilterAll"> 
        
                <telerik:RadTreeView  
        
                    ID="RadTreeViewDataFilterAll"  
        
                    Runat="server"  
        
                    CheckBoxes="True"  
        
                    EnableDragAndDrop="True"  
        
                    TriStateCheckBoxes="True"  
        
                    CheckChildNodes="False" 
        
                    OnClientNodeChecked="RadTreeViewDataFilterAll_OnClientNodeChecked" 
        
                    OnClientContextMenuItemClicked="RadTreeViewDataFilterAll_OnClientContextMenuItemClicked" 
        
                    OnClientContextMenuShowing="RadTreeViewDataFilterAll_OnClientContextMenuShowing" 
        
                    OnClientNodeDragStart="RadTreeViewDataFilterAll_OnClientNodeDragStart" 
        
                    OnClientNodeClicked="RadTreeViewDataFilterAll_OnClientNodeClicked" 
        
                    OnClientNodeDropped="RadTreeViewDataFilterAll_OnClientNodeDropped"> 
        
                    <Nodes> 
        
                        <telerik:RadTreeNode runat="server" Checkable="False" Text="Available Filters"></telerik:RadTreeNode> 
        
                    </Nodes> 
        
                    <contextmenus> 
        
                        <telerik:RadTreeViewContextMenu ID="RadTreeViewAllDataFiltersContextMenu" runat="server"> 
        
                            <Items> 
        
                                <telerik:RadMenuItem  runat="server" Text="Select Filter" Value="select"></telerik:RadMenuItem> 
        
                                <telerik:RadMenuItem  runat="server" Text="Remove Filter" Value="remove"></telerik:RadMenuItem> 
        
                            </Items> 
        
                        </telerik:RadTreeViewContextMenu> 
        
                    </contextmenus> 
        
                </telerik:RadTreeView> 
        
            </div>

So i dont understand, how the RadAjaxManager locate the correct RadToolbarButton, if it does not have a ID. Or if it is invisible. it may be the same id as other Toolbarbuttons? Maybe the RadAjaxManger tries to get the ID with <%=RadToolBatButton1.ClientID%> and this raise the Error. But how should I use the RadAjaxManager to update the RadTreeView, when the RadToolbarButton was clicked?

regards

Jürgen