Question

I have a User Control defined like this:

XAML:

<UserControl>
<Grid x:Name="LayoutRoot">
    <TabControl x:Name="TabControl" ItemsSource="{Binding Products}" >
        <TabControl.ContentTemplate>
            <DataTemplate>
                <Grid>
                    <ListView ItemsSource="{Binding Features}" Name="FeaturesListView">
                        <ListView.View>
                            <GridView>
                                <GridViewColumn x:Name="FeatureHeader" DisplayMemberBinding="{Binding Name}"  />
                                <GridViewColumn x:Name="CounterHeader" DisplayMemberBinding="{Binding Counter}" />
                                <GridViewColumn x:Name="ExpireDateHeader"  DisplayMemberBinding="{Binding ExpireDate}" />
                            </GridView>
                        </ListView.View>
                    </ListView>
                </Grid>
            </DataTemplate>
        </TabControl.ContentTemplate>
    </TabControl>
</Grid>

code behind:

public partial class LicenseInfoControl : UserControl
{
    public LicenseInfoControl(ShowableLicense license)
    {
        InitializeComponent();
        DataContext = license;
    }
}

So, if I use one User Control for one Window:

<Window>
    <Grid>
        <local:LicenseInfoControl x:Name="LicenseInfoControl"/>
    </Grid>
</Window>

it works great. But if I use two of them:

<Window>
    <Grid>
        <local:LicenseInfoControl x:Name="FileLicenseInfoControl"/>
        <local:LicenseInfoControl x:Name="SamLicenseInfoControl"/>
    </Grid>
</Window>

Both ListViews are empty. What am I doing wrong?

Answer 1

Binding worked well. The problem was that if TabControl has one TabItem – it get selected when window loaded and data exposes into it. But if TabControl has two TabItems – no one of the get selected and there’s a feeling that binding hasn’t worked. But if you select one of Tab Items – data exposes immediately.
So the decision is set SelectedIndexes at a constructor of window with two User controls (LicenseInfoControl in my case):

FileLicenseInfoControl.ProductTabControl.SelectedIndex = 0;
SamLicenseInfoControl.ProductTabControl.SelectedIndex = 0;