WPF - Binding a list of a string to a column in Data Grid

Question

I have a datagrid with three columns.

Answer 1

Your problem seems to be that you add the StackPanel as item to the ItemsControl instead of using it in a DataTemplate.

Instead of

<ItemsControl ItemSource="{Binding SomeList}">
    <StackPanel Orientation="Horizontal">
        <TextBlock Text="SomeTopic"/>
        <ComboBox ItemSource="{Binding }"/>
    </StackPanel>
</ItemsControl>

it should look like this:

<ItemsControl ItemSource="{Binding SomeList}">
    <ItemsControl.ItemTemplate>
        <DataTemplate>
            <StackPanel Orientation="Horizontal">
                <TextBlock Text="SomeTopic"/>
                <ComboBox ItemSource="{Binding }"/>
            </StackPanel>
        </DataTemplate>
    </ItemsControl.ItemTemplate>
</ItemsControl>