How can I track the selected TabPage's DataContext from my ViewModel? - wpf

Question

I have TabItem class:
public class TabItem
{
public string Header { get; set; }
public IView Content { get; set; }
}
and in my model:
public ObservableCollection<TabItem> Tabs
{
get { return _tabs; }
set
{
if(_tabs!=value)
{
_tabs = value;
RaisePropertyChanged("Tabs");
}
}
}
public TabItem CurrentTabItem
{
get { return _currentTabItem; }
set
{
if (_currentTabItem != value)
{
}
_currentTabItem = value;
RaisePropertyChanged("CurrentTabItem");
}
}
In View i'm binding to ModelView:
<TabControl x:Name="shellTabControl" ItemsSource="{Binding Tabs}"
IsSynchronizedWithCurrentItem="True" SelectionChanged="ShellTabControlSelectionChanged">
<TabControl.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding Header}"/>
</DataTemplate>
</TabControl.ItemTemplate>
<TabControl.ContentTemplate>
<DataTemplate>
<ContentPresenter Content="{Binding Content}"/>
</DataTemplate>
</TabControl.ContentTemplate>
</TabControl>
From view i want to change ViewModel's CurrentTabItem property:
private void ShellTabControlSelectionChanged(object sender, SelectionChangedEventArgs e)
{
if(e.Source is TabItem)
{
var tabItem = e.Source as TabItem;
ViewModel.CurrentTabItem = tabItem; //don't work
}
}
What is the best approach to convert TabControl's TabItem to my TabItem?

Answer 1

Maybe it is better to use SelectedItem="{Binding CurrentTabItem, Mode=TwoWay, UpdateSourceTrigget=PropertyChanged}"?

Answer 2

<TabControl x:Name="shellTabControl" ItemsSource="{Binding Tabs}"
IsSynchronizedWithCurrentItem="True"
SelectionChanged="ShellTabControlSelectionChanged"
SelectedItem={Binding Path=CurrentTabItem,Mode=Twoway}>
<TabControl.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding Header}"/>
</DataTemplate>
</TabControl.ItemTemplate>
<TabControl.ContentTemplate>
<DataTemplate>
<ContentPresenter Content="{Binding Content}"/>
</DataTemplate>
</TabControl.ContentTemplate>
</TabControl>
This will get you the selected TabItem.......
Also change the Name of your Custom "TabItem" its confusing ;)