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refreshing panelbar items

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Kevin asked on 01 Feb 2012, 03:36 AM
hi,  i'm trying to load a panel dynamically.  after i create a new object in my Diagrams collection, i just want to empty the panel and reload.  am i even close to correct here?:

        private void LoadWorkflowsToPanelBar()
            var workflowsPanel = rpbTools.ChildrenOfType<RadPanelBarItem>().ElementAt(0);
            foreach (var sssWorkflowDiagram in Diagrams)  // Diagrams is a collection i keep elsewhere
                RadPanelBarItem panelBarItem = new RadPanelBarItem();
                StackPanel stackPanel = new StackPanel();
                stackPanel.Orientation = Orientation.Horizontal;
                Image image = CreateImage("../Images/workflow.png", "../Images/workflow.png", sssWorkflowDiagram.Name);
                TextBlock textBlock = new TextBlock();
                textBlock.Text = sssWorkflowDiagram.Name;

                panelBarItem.Tag = sssWorkflowDiagram.Id;
                panelBarItem.Header = stackPanel;
                workflowsPanel.Items.Add(panelBarItem);  // error is here
this works fine the first time through, but the second time it is called, it does not load correctly.  when i debug this code, the following exception is thrown when the loop gets around to my new diagram:

{System.ArgumentException: Value does not fall within the expected range.
   at MS.Internal.XcpImports.MethodEx(IntPtr ptr, String name, CValue[] cvData)
   at MS.Internal.XcpImports.MethodPack(IntPtr objectPtr, String methodName, Object[] rawData)
   at MS.Internal.XcpImports.Collection_Add[T](PresentationFrameworkCollection`1 collection, Object value)
   at System.Windows.PresentationFrameworkCollection`1.AddImpl(Object value)
   at System.Windows.Controls.ItemCollection.AddImpl(Object value)
   at System.Windows.Controls.ItemCollection.AddInternal(Object value)
   at System.Windows.PresentationFrameworkCollection`1.Add(T value)
   at SafetySpaces.Prototype.Silverlight.WorkflowDesigner.LoadWorkflowsToPanelBar()
   at SafetySpaces.Prototype.Silverlight.WorkflowDesigner.GetAllWorkflowDiagramsQueryCompleted(LoadOperation`1 loadOperation)
   at System.ServiceModel.DomainServices.Client.DomainContext.<>c__DisplayClass13`1.<Load>b__11(LoadOperation lo)
   at System.ServiceModel.DomainServices.Client.LoadOperation.<>c__DisplayClass4`1.<Create>b__0(LoadOperation`1 arg)
   at System.ServiceModel.DomainServices.Client.LoadOperation`1.InvokeCompleteAction()
   at System.ServiceModel.DomainServices.Client.OperationBase.Complete(Object result)
   at System.ServiceModel.DomainServices.Client.LoadOperation.Complete(DomainClientResult result)
   at System.ServiceModel.DomainServices.Client.DomainContext.CompleteLoad(IAsyncResult asyncResult)
   at System.ServiceModel.DomainServices.Client.DomainContext.<>c__DisplayClass1b.<Load>b__17(Object )}



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Petar Mladenov
Telerik team
answered on 03 Feb 2012, 02:39 PM
Hello Kevin ,

 I believe this could be naming issue in SIlverlight (2 visual elements with equal names). Could you please check out this forum post and let us know if it helps you or not? Thank you in advance.

Kind regards,
Petar Mladenov
the Telerik team

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