Exception in TileView

[Ken]

Hi,

Since upgrading to q1 2011, I sometimes get this exception in the tileview:

MS.Internal.WrappedException: The given key was not present in the dictionary. ---> System.Collections.Generic.KeyNotFoundException: The given key was not present in the dictionary.
   at System.ThrowHelper.ThrowKeyNotFoundException()
   at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
   at Telerik.Windows.Controls.TileView.PositionToIndexDictionary.GetPositionFromIndex(Int32 index)
   at Telerik.Windows.Controls.RadTileView.UpdatePositions()
   at Telerik.Windows.Controls.RadTileView.OnVisibilityChanged(RadTileViewItem container)
   at Telerik.Windows.Controls.RadTileView.PrepareContainerForItemOverride(DependencyObject element, Object item)
   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.TileViewPanel.RealizeMaximizedItem()
   at Telerik.Windows.Controls.TileViewPanel.MeasureNonRestoredChildren()
   at Telerik.Windows.Controls.TileViewPanel.MeasureOverride(Size availableSize)
   at System.Windows.FrameworkElement.MeasureOverride(IntPtr nativeTarget, Single inWidth, Single inHeight, Single& outWidth, Single& outHeight)
   --- End of inner exception stack trace ---

Any idea what's going on?

Thanks

[Zarko]

Hi Adrian,

 We are aware of this problem and we hope that we've fixed it in our latest internal build so if you want you can download it( 2011_1_0405 ) and see if this problem occurs again or you can wait until the official SP1 release which is scheduled for April the 14th.

Best wishes,
Zarko
the Telerik team

[Ken]

Hi Zarko,

Just tried 0405: it doesn't throw an exception anymore, but it doesn't work properly either. Instead of 3 tile view items only one is loaded, and when I try to minimize it half of it will just fly off-screen :(

Please let me know when you have a fix for this, even if it's a internal build.

Thanks,
Adrian

[Zarko]

Hi Adrian,

 Could you please send us a project that reproduces this issue so that we could investigate it, give you a work around and fix it for our next internal release(or for the SP1 if it is a bigger problem)?

All the best,
Zarko
the Telerik team

[Ken]

Hi Zarko,

You can repro the issue by creating a simple SL4 application and in MainPage.Xaml:

		<telerik:RadTileView MinimizedColumnWidth="300" MaximizeMode="One" MinimizedItemsPosition="Left" x:Name="tileView">
			
		</telerik:RadTileView>

And in the codebehind:

public partial class MainPage : UserControl
	{
		public MainPage()
		{
			// Required to initialize variables
			InitializeComponent();
 
            tileView.Loaded += new RoutedEventHandler(tileView_Loaded);
		}
 
        void tileView_Loaded(object sender, RoutedEventArgs e)
        {
            var tileViewItem = new RadTileViewItem();
            tileViewItem.Header = "Test test";
            tileViewItem.TileState = TileViewItemState.Minimized;
 
            tileView.Items.Add(tileViewItem);
 
        }
	}

Let me know if you can reproduce it like this.

Thanks,
Adrian

[Zarko]

Hello Adrian,

 Thank you for the bug report. I looked into it and there was a small problem which will be fixed in our next internal build. For now if you are going to use only one item you could change the MinimizedItemsPosition to Right and I couldn't find a problem when there are more than one items:

void tileView_Loaded(object sender, RoutedEventArgs e)
{
    var tileViewItem = new RadTileViewItem();
    tileViewItem.Header = "Test test";
    tileViewItem.TileState = TileViewItemState.Minimized;

    tileView.Items.Add(tileViewItem);

    var tileViewItem2 = new RadTileViewItem();
    tileViewItem2.Header = "Test 2";
    tileViewItem2.TileState = TileViewItemState.Minimized;

    tileView.Items.Add(tileViewItem2);
}

With this code everything was working fine.
I've updated your telerik account and if you have further questions feel free to ask.

Regards,
Zarko
the Telerik team

[Ken]

Thanks for the quick help. However I can't change the position as it would look weird from my current UI point of view. I guess I'll wait for the next build.

Cheers,
Adrian