[Solved] Another hard crash in TileView Q1 2011

[David]

Hallo,
I had another problem with WPF TileView today.
When I have two TileViews on one Grid (each in it's own Grid row) application crashes bacause of Telerik exception ""Unable to maximize an item with the current configuration. "" after I try to maximize any TileViewItem. It's in Telerik's TileViewPanel.cs:1317 (we have licence+Telerik code..)

Please help!
Thank you.
 David.

<Grid>
    <Grid.RowDefinitions>
        <RowDefinition Height="Auto" />
        <RowDefinition Height="Auto" />
        <RowDefinition Height="Auto" />
        <RowDefinition Height="Auto" />
    </Grid.RowDefinitions>
<telerik:RadTileView Grid.Row="1"
            TileStateChangeTrigger="SingleClick"
            MaximizeMode="ZeroOrOne"
            IsItemDraggingEnabled="True"
            PreservePositionWhenMaximized="True"
            MinimizedColumnWidth="100"
            IsAutoScrollingEnabled="True"
            IsAnimationOptimized="True"
            ColumnsCount="1"
            MaxColumns="1"
            >
    <telerik:RadTileViewItem Header="tile1 - RestoredHeight height 100" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" RestoredHeight="100" >
        <Grid>
            <TextBox Text="test1" />
        </Grid>
    </telerik:RadTileViewItem>
    <telerik:RadTileViewItem Header="tile2 - RestoredHeight height 100" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" RestoredHeight="100" >
        <Grid>
            <TextBox Text="test2" />
        </Grid>
    </telerik:RadTileViewItem>
    <telerik:RadTileViewItem Header="tile3 - RestoredHeight height 100" VerticalAlignment="Stretch" RestoredHeight="100"  HorizontalAlignment="Stretch" >
        <Grid>
            <TextBox Text="test3 " />
        </Grid>
    </telerik:RadTileViewItem>
    <telerik:RadTileViewItem Header="tile4 - RestoredHeight height 150" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" RestoredHeight="150" >
        <Grid>
            <TextBox Text="test2" />
        </Grid>
    </telerik:RadTileViewItem>
</telerik:RadTileView>

<GridSplitter Grid.Row="2" HorizontalAlignment="Stretch" Height="3" />

<telerik:RadTileView Grid.Row="3"
            TileStateChangeTrigger="SingleClick"
            MaximizeMode="ZeroOrOne"
            IsItemDraggingEnabled="True"
            PreservePositionWhenMaximized="True"
            MinimizedColumnWidth="100"
            IsAutoScrollingEnabled="True"
            IsAnimationOptimized="True"
            ColumnsCount="1"
            MaxColumns="1"
            >
    <telerik:RadTileViewItem Header="tile1 - RestoredHeight height 100" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" RestoredHeight="100" >
        <Grid>
            <TextBox Text="test1" />
        </Grid>
    </telerik:RadTileViewItem>
    <telerik:RadTileViewItem Header="tile2 - RestoredHeight height 100" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" RestoredHeight="100" >
        <Grid>
            <TextBox Text="test2" />
        </Grid>
    </telerik:RadTileViewItem>
    <telerik:RadTileViewItem Header="tile3 - RestoredHeight height 100" VerticalAlignment="Stretch" RestoredHeight="100"  HorizontalAlignment="Stretch" >
        <Grid>
            <TextBox Text="test3 " />
        </Grid>
    </telerik:RadTileViewItem>
    <telerik:RadTileViewItem Header="tile4 - RestoredHeight height 150" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" RestoredHeight="150" >
        <Grid>
            <TextBox Text="test2" />
        </Grid>
    </telerik:RadTileViewItem>
</telerik:RadTileView>

</Grid>

[Zarko]

Hello David,
You are experiencing this problem because you measure the RadTileView with infinity (horizontally, because of the rows height - Auto) and you haven't set the MinimizedRowHeight property. The default value of the MinimizedRowHeight is a star ("*") which means that the RadTileView splits the available space in equal portions and sets the items there, but it can't split infinity. So if you want to measure the RadTileView with infinity (if it's in row with height Auto, in StackPanel or in a ScrollViewer) you'll have to set some kind of restriction - MaxHeight, Height or MinimizedRowHeight.
I've created a sample project so you could examine it and if you have further questions feel free to ask. 

Best wishes,
Zarko
the Telerik team