Multi tool use

WPF Combobox selectedindex binding

I have difficulties binding the selectedindex of a combobox to an object.
This is my code:

(Part of) CustomerClass

public class Customer : INotifyPropertyChanged
{
public int CountryCode
{
get { return _CountryCode; }
set { _CountryCode = value; NotifyPropertyChanged(); }
}
}


2a. (Part of) CustomListItem

<ComboBox x:Name="cboCountryCode" Grid.Column="5" ItemsSource="{Binding}" DisplayMemberPath="LongName" SelectedIndex="{Binding CountryCode, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>


2b. (Part of) CustomListItem

public partial class CustomerListItem : UserControl
{
public CustomerListItem()
{
InitializeComponent();
ObservableCollection<CountryCode> Liste = CountryCodes.Instance.List;
cboCountryCode.DataContext = Liste;
}


(Part of) MainPage

<ItemsControl Name="itcCustomers" Style="{StaticResource ItemsControlVirtualizedStyle}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<local:CustomerListItem/>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>


The Combobox List Items are shown correctly.
But the selected index is not working at all
See this screenshot

1 Answer
1

I found the problem. I tried to bind the Combobox to two different Datasources. One for the collection and one for the selectedindex. Now I combinde these two Datasources into one class and bound to it, now it works fine

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