Hi, we're getting this exception when updating to v. 2010.3.1331.40 in the RadGridView control:
 
System.Reflection.TargetInvocationException was unhandled
  Message=Property accessor 'C' on object 'RadControlsWpfApp2.A' threw the following exception:'Object does not match target type.'

It seems like the problem is related to the number of sublevels in the DataMemberBinding. In the example below the binding of the first column works, but the second column fails.

To recreate the exception:

<Window x:Class="RadControlsWpfApp2.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
        xmlns:telerik="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.GridView" 
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <telerik:RadGridView
            ItemsSource="{Binding Items}"
            AutoGenerateColumns="False">
            <telerik:RadGridView.Columns>
                <telerik:GridViewDataColumn DataMemberBinding="{Binding Path=B.Id}" Header="Works" ></telerik:GridViewDataColumn>
                <telerik:GridViewDataColumn DataMemberBinding="{Binding Path=B.C.Name}" Header="Fails" ></telerik:GridViewDataColumn>
            </telerik:RadGridView.Columns>
        </telerik:RadGridView>
    </Grid>
</Window>

namespace RadControlsWpfApp2
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            var model = new Model();
            DataContext = model;
        }
    }
}

using System.Collections.Generic;
 
namespace RadControlsWpfApp2
{
    class Model
    {
        public Model()
        {
            Items = new List<A> {new A(), new A()};
        }
        public IList<A> Items { get; set; }
    }
 
    class A
    {
        public A()
        {
            B = new B();
        }
        public B B { get; set; }
    }
    class B
    {
        public B()
        {
            C = new C();
            Id = "3213123";
        }
 
        public string Id { get; set; }
        public C C { get; set; }
    }
    class C
    {
        public C()
        {
            Name = "Test";
        }
        public string Name { get; set; }
    }
}

And here is the exception details:
System.Reflection.TargetInvocationException was unhandled
  Message=Property accessor 'C' on object 'RadControlsWpfApp2.A' threw the following exception:'Object does not match target type.'
  Source=System
  StackTrace:
       at System.ComponentModel.ReflectPropertyDescriptor.GetValue(Object component)
       at Telerik.Windows.Data.PropertyPathDescriptor.GetPropertyOwnerValue(Object parentObject) in c:\Builds\WPF_Scrum\HotFix_2010_Q3\Sources\Development\Core\Data\ItemProperties\PropertyPathDescriptor.cs:line 161
       at Telerik.Windows.Controls.GridView.GridViewCell.GetDataErrors() in c:\Builds\WPF_Scrum\HotFix_2010_Q3\Sources\Development\Controls\GridView\GridView\GridView\Cells\GridViewCell.cs:line 614
       at Telerik.Windows.Controls.GridView.GridViewCell.UpdateIsValidState() in c:\Builds\WPF_Scrum\HotFix_2010_Q3\Sources\Development\Controls\GridView\GridView\GridView\Cells\GridViewCell.cs:line 588
       at Telerik.Windows.Controls.GridView.GridViewCell.UpdateValue() in c:\Builds\WPF_Scrum\HotFix_2010_Q3\Sources\Development\Controls\GridView\GridView\GridView\Cells\GridViewCell.cs:line 1358
       at Telerik.Windows.Controls.GridView.GridViewCell.OnColumnChanged(GridViewColumn oldColumn, GridViewColumn newColumn) in c:\Builds\WPF_Scrum\HotFix_2010_Q3\Sources\Development\Controls\GridView\GridView\GridView\Cells\GridViewCell.cs:line 1341
       at Telerik.Windows.Controls.GridView.GridViewCellBase.set_Column(GridViewColumn value) in c:\Builds\WPF_Scrum\HotFix_2010_Q3\Sources\Development\Controls\GridView\GridView\GridView\Cells\GridViewCellBase.cs:line 160
       at Telerik.Windows.Controls.GridView.DataCellsPresenter.PrepareContainerForItemOverride(DependencyObject element, Object item) in c:\Builds\WPF_Scrum\HotFix_2010_Q3\Sources\Development\Controls\GridView\GridView\GridView\DataCellsPresenter.cs:line 261
       at System.Windows.Controls.ItemsControl.MS.Internal.Controls.IGeneratorHost.PrepareItemContainer(DependencyObject container, Object item)
       at System.Windows.Controls.ItemContainerGenerator.System.Windows.Controls.Primitives.IItemContainerGenerator.PrepareItemContainer(DependencyObject container)
       at Telerik.Windows.Controls.GridView.GridViewCellsPanel.InsertContainer(Int32 childIndex, UIElement container, Boolean isRecycled) in c:\Builds\WPF_Scrum\HotFix_2010_Q3\Sources\Development\Controls\GridView\GridView\GridView\Virtualization\GridViewCellsPanel.cs:line 889
       at Telerik.Windows.Controls.GridView.GridViewCellsPanel.InsertNewContainer(Int32 childIndex, UIElement container) in c:\Builds\WPF_Scrum\HotFix_2010_Q3\Sources\Development\Controls\GridView\GridView\GridView\Virtualization\GridViewCellsPanel.cs:line 808
       at Telerik.Windows.Controls.GridView.GridViewCellsPanel.AddContainerFromGenerator(Int32 childIndex, UIElement child, Boolean newlyRealized) in c:\Builds\WPF_Scrum\HotFix_2010_Q3\Sources\Development\Controls\GridView\GridView\GridView\Virtualization\GridViewCellsPanel.cs:line 791
       at Telerik.Windows.Controls.GridView.GridViewCellsPanel.GenerateChild(IItemContainerGenerator generator, Size constraint, GridViewColumn column, Int32& childIndex, Size& childSize) in c:\Builds\WPF_Scrum\HotFix_2010_Q3\Sources\Development\Controls\GridView\GridView\GridView\Virtualization\GridViewCellsPanel.cs:line 703
       at Telerik.Windows.Controls.GridView.GridViewCellsPanel.GenerateChild(IItemContainerGenerator generator, Size constraint, GridViewColumn column, IDisposable& generatorState, Int32& childIndex, Size& childSize) in c:\Builds\WPF_Scrum\HotFix_2010_Q3\Sources\Development\Controls\GridView\GridView\GridView\Virtualization\GridViewCellsPanel.cs:line 681
       at Telerik.Windows.Controls.GridView.GridViewCellsPanel.DetermineRealizedColumnsBlockList(Size constraint) in c:\Builds\WPF_Scrum\HotFix_2010_Q3\Sources\Development\Controls\GridView\GridView\GridView\Virtualization\GridViewCellsPanel.cs:line 412
       at Telerik.Windows.Controls.GridView.GridViewCellsPanel.MeasureOverride(Size constraint) in c:\Builds\WPF_Scrum\HotFix_2010_Q3\Sources\Development\Controls\GridView\GridView\GridView\Virtualization\GridViewCellsPanel.cs:line 80
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint)
       at System.Windows.Controls.ItemsPresenter.MeasureOverride(Size constraint)
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at System.Windows.Controls.Grid.MeasureOverride(Size constraint)
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at System.Windows.Controls.Control.MeasureOverride(Size constraint)
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at System.Windows.Controls.Grid.MeasureCell(Int32 cell, Boolean forceInfinityV)
       at System.Windows.Controls.Grid.MeasureCellsGroup(Int32 cellsHead, Size referenceSize, Boolean ignoreDesiredSizeU, Boolean forceInfinityV)
       at System.Windows.Controls.Grid.MeasureOverride(Size constraint)
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at System.Windows.Controls.Border.MeasureOverride(Size constraint)
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at System.Windows.Controls.Control.MeasureOverride(Size constraint)
       at Telerik.Windows.Controls.GridView.GridViewRowItem.MeasureOverride(Size constraint) in c:\Builds\WPF_Scrum\HotFix_2010_Q3\Sources\Development\Controls\GridView\GridView\GridView\Rows\GridViewRowItem.cs:line 169
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at Telerik.Windows.Controls.GridView.GridViewVirtualizingPanel.MeasureOverride(Size constraint) in c:\Builds\WPF_Scrum\HotFix_2010_Q3\Sources\Development\Controls\GridView\GridView\GridView\Virtualization\GridViewVirtualizingPanel.cs:line 1269
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at System.Windows.ContextLayoutManager.UpdateLayout()
       at System.Windows.UIElement.UpdateLayout()
       at System.Windows.Interop.HwndSource.SetLayoutSize()
       at System.Windows.Interop.HwndSource.set_RootVisualInternal(Visual value)
       at System.Windows.Interop.HwndSource.set_RootVisual(Visual value)
       at System.Windows.Window.SetRootVisual()
       at System.Windows.Window.SetRootVisualAndUpdateSTC()
       at System.Windows.Window.SetupInitialState(Double requestedTop, Double requestedLeft, Double requestedWidth, Double requestedHeight)
       at System.Windows.Window.CreateSourceWindow(Boolean duringShow)
       at System.Windows.Window.CreateSourceWindowDuringShow()
       at System.Windows.Window.SafeCreateWindowDuringShow()
       at System.Windows.Window.ShowHelper(Object booleanBox)
       at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
       at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
       at System.Windows.Threading.DispatcherOperation.InvokeImpl()
       at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state)
       at System.Threading.ExecutionContext.runTryCode(Object userData)
       at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)
       at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Windows.Threading.DispatcherOperation.Invoke()
       at System.Windows.Threading.Dispatcher.ProcessQueue()
       at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
       at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
       at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
       at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
       at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
       at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
       at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
       at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
       at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
       at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
       at System.Windows.Threading.Dispatcher.Run()
       at System.Windows.Application.RunDispatcher(Object ignore)
       at System.Windows.Application.RunInternal(Window window)
       at System.Windows.Application.Run(Window window)
       at System.Windows.Application.Run()
       at RadControlsWpfApp2.App.Main() in c:\users\arnvol\documents\visual studio 2010\Projects\RadControlsWpfApp2\RadControlsWpfApp2\obj\x86\Debug\App.g.cs:line 0
       at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException: System.Reflection.TargetException
       Message=Object does not match target type.
       Source=mscorlib
       StackTrace:
            at System.Reflection.RuntimeMethodInfo.CheckConsistency(Object target)
            at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)
            at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
            at System.SecurityUtils.MethodInfoInvoke(MethodInfo method, Object target, Object[] args)
            at System.ComponentModel.ReflectPropertyDescriptor.GetValue(Object component)
       InnerException:

Regards,
Arnstein

After I've updated to latest version, I've recieved a null reference exception when I was setting the RadGridView's ItemSource to null.
I've rolled back to the previous version of Telerik Controls and it is back to normal.  Could you check the new version for a possible bug?

Please let me know how I can:

1. Programmatically select an item in a Hierarchical gridview. I want to select items both from the inner and the outer grids.

2. If an item (in the outer grid ) is not in the visible range and it has been expanded programmatically, how I can bring it up in the visible range.

Simple code:

 

 

 

 

 

<Window x:Class="MainWindow"

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

    Height="350" Width="525" xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation">

    <Grid>

        <telerik:RadTabControl>

  

            <telerik:RadTabItem Header="Calendar">

                    <telerik:RadDocking>

  

                    </telerik:RadDocking>

            </telerik:RadTabItem>

  

            <telerik:RadTabItem Header="Colors">

                    <telerik:RadDocking >

  

                    </telerik:RadDocking>

            </telerik:RadTabItem>

  

            <telerik:RadTabItem Header="Quote">

                    <telerik:RadDocking >

  

                    </telerik:RadDocking>

            </telerik:RadTabItem>

  

        </telerik:RadTabControl>

  

    </Grid>

</Window>

The main window is blinking when you switch between tabs repeatedly. Sometimes window even disappear/hides.
How to solve this ?

Hi,

Please excuse my ignorance but I'm just beginning to do battle with WPF styling / Templates etc.

I'm trying to style up a RadMenu that is databound and uses the  HierarchicalDataTemplate. I'd like to have the header row menu items styled differently to the child items, including font sizes, mouseover colors / animations etc. The examples contained in the documentation seem to be very limited, showing only the most basic of style setters and no examples of selecting different styles based on the type of menu item (header item or child). Can anyone provide me with a more complete example of radically changing the styling of a RadMenu as described above?

Many thanks

Mat

We are using the ScheduleView. Here is the question. We use this to show the surface booked by many different customers. Each customer can be assigned a color ( we store this in our database). The Appointment style selector example is great... but in our case, the colors need to change dynamically. How can we achieve this. I know I can create a XAML and use ResourceDictionary. the problem is that our clients have the ability to swap colors or add new customers and new colors.

Thanks in Advance.

Hello,

Is there a reason why the RadPanelBarItem does not have a Command property ?

This would be nice in MVVM scenarios. Are there any plans to implement it ?

Using Telerik.Windows.Controls library for WPF, version 2010.2.924.35, within a WPF .NET 3.5 application.  When I use the static Alert, Prompt, or Confirm methods, a RadWindow opens up, but the hovering of the mouse cursor over any other typical RAD controls in the window (the 'Ok' or 'Cancel' RadButtons, the 'X' close RadButton in the top right corner, the Prompt dialog's RadTextBox) is slow/sluggish.  This sluggishness only lasts for a second or two while the control goes through its state change due to the inherent mouse over/hover event.

I'm not doing anything fancy:

Please help!  Thanks!

Hi,

Is the source code for the video demonstrations available?

Cheers, Steve

Hello,

I have an issue with the raddocking's loadlayout().
When i try to load a layout, sometimes the splittercontainer's position fails to load correctly.

I've made a small demo to represent the problem.



After i started the demo, I floated the Pane7, then I re-docked it to the inner-left area (so there will be 2 radpanegroups at the end).
I set the splitter's position by hand, then saved the layout to an xml file.

Here is the result:

As you can see, the first radpanegroup is approximately ~42px wide, while the second is 456px. So far so good...
But when i try to load these settings, the splitter's position fails to load correctly.

I've made a screenshots before and after the layout loading.

Before:
Right splitter position screenshot

After:
Wrong splitter position screenshot

Have you got any idea what could cause this behaviour? Any help will be appreciated.

Greetings,
Thomas