CODEWITHSUNDEEP
windows-runtimewindows-store-appswinrt-xamlwindows-10winrt-xaml-toolkit
SurenSaluka
SurenSaluka

Reputation: 1591

WinRTXAMLToolkit Treeview Crash on Windows 10

I have recently upgraded my OS to Windows 10 from Windows 8.1. I'm using VS 2013 With update 4. My app using the Treeview control from XAMLToolkit, and it works perfectly on Windows 8.1 environment. But under Windows 10, it gives me the following error. Please help.

This is the XAMLToolkit version I've used: nuget.org/packages/winrtxamltoolkit.windows

Exception message:

System.Runtime.InteropServices.COMException: Error HRESULT E_FAIL has been returned from a call to a COM component. at Windows.UI.Xaml.Controls.ItemsControl.get_ItemTemplate() at WinRTXamlToolkit.Controls.HeaderedItemsControl.PrepareHeaderedItemsControlContainer(HeaderedItemsControl control, Object item, ItemsControl parentItemsControl, Style parentItemContainerStyle) at WinRTXamlToolkit.Controls.HeaderedItemsControl.PrepareHeaderedItemsControlContainerForItemOverride(DependencyObject element, O

Stacktrace:

at Windows.UI.Xaml.Controls.ItemsControl.get_ItemTemplate() at WinRTXamlToolkit.Controls.HeaderedItemsControl.PrepareHeaderedItemsControlContainer(HeaderedItemsControl control, Object item, ItemsControl parentItemsControl, Style parentItemContainerStyle) at WinRTXamlToolkit.Controls.HeaderedItemsControl.PrepareHeaderedItemsControlContainerForItemOverride(DependencyObject element, Object item, ItemsControl parent, Style parentItemContainerStyle) at WinRTXamlToolkit.Controls.TreeView.PrepareContainerForItemOverride(DependencyObject element, Object item) at Windows.UI.Xaml.FrameworkElement.MeasureOverride(Size availableSize)

Inner exception is null

Upvotes: 4

Views: 902

Answers (2)

Nambukarthy Raveendran
Nambukarthy Raveendran

Reputation: 116

I encountered same issue, what i did is just removed the itemtemplate inside treeview control and added separately in page resource and i refered the itemtemplate to my treeview control. it solved my issue.

<Page.Resources>

<DataTemplate x:Name="TreeViewItemTemplate">
<Grid>
<TextBlock Text="{Binding Name}" />
</Grid>

<XCDATA:DataTemplateExtensions.Hierarchy>
<XCDATA:HierarchicalDataTemplate ItemsSource="{Binding Items}" />
</XCDATA:DataTemplateExtensions.Hierarchy>

</DataTemplate>

</Page.Resources>

<XC:TreeView 
    ItemTemplate="{StaticResource TreeViewItemTemplate}"
    ItemsSource="{Binding ObjShopItems}">      
</XC:TreeView>

Upvotes: 1

Artem
Artem

Reputation: 2075

Seems that you are using a HierarchicalDataTemplate in your XAML code for the TreeView. Replacing the XAML with the corresponding C# code will help. We can set the DataTemplateExtensions.Hierarchy attached property in code-behind in Loaded event for the TreeView, like this:

<controls:TreeView x:Name="treeView"
                   Loaded="treeView_Loaded"
...

And in code-behind:

private void treeView_Loaded(object sender, RoutedEventArgs e)
        {
            //don't know why, but in Windows 10 if this code is as XAML, the app falls with a ComExcpetion
            //so the corresponding XAML should be commented out like this:
            //...
            //<controls:TreeView.ItemTemplate>
            //  <DataTemplate>
            //   <!-- <data:DataTemplateExtensions.Hierarchy>
            //    <data:HierarchicalDataTemplate ItemsSource="{Binding Folders}" />
            //   </data:DataTemplateExtensions.Hierarchy> -->
            //  <Grid>
            //...
            WinRTXamlToolkit.Controls.Data.DataTemplateExtensions.SetHierarchy(treeView.ItemTemplate, new WinRTXamlToolkit.Controls.Data.HierarchicalDataTemplate
                {
                    ItemsSource = new Windows.UI.Xaml.Data.Binding { Path = new PropertyPath("Folders") }
                });
        }

Upvotes: 0

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