How to Bind ViewModel ItemsSource to ComboBox inside Template in WPF / UWP TreeGrid in MVVM?

This example illustrates to bind the ComboBox ItemsSource that is loaded inside the template column in WPF TreeGrid and UWP TreeGrid (SfTreeGrid).

You can load a ComboBox inside TreeGridTemplateColumn and bind the ItemsSource from ViewModel to ComboBox using ElementName binding.

<syncfusion:TreeGridTemplateColumn MappingName="Title" syncfusion:FocusManagerHelper.WantsKeyInput="True">
        <syncfusion:TreeGridTemplateColumn.CellTemplate>
            <DataTemplate>
                <TextBlock Text="{Binding Title}"/>
            </DataTemplate>
        </syncfusion:TreeGridTemplateColumn.CellTemplate>
        <syncfusion:TreeGridTemplateColumn.EditTemplate>
            <DataTemplate>
                <ComboBox ItemsSource="{Binding Path=DataContext.TitleList, ElementName=treeGrid}" />
            </DataTemplate>
        </syncfusion:TreeGridTemplateColumn.EditTemplate>
 </syncfusion:TreeGridTemplateColumn>