ComboBox KeyValuePair Binding WPF - Display Member - wpf

Question

i got a quick question about binding the DisplayMember of my ComboBox.
I have a list with a KeyValuePair for example:
1, Value1;
2, Value2;
3, Value3;
My SelectedValuePath is set to Key which is in my example "1".
Now i want my DisplayMemberPath to show "Key - Value" so for example the Textbox should show "1 - Value1".
Is that possible?
Thank's in advance!

Answer 1

If your ComboBox is not editable, you can create a DataTemplate for your key-value pairs.
<ComboBox ...>
<ComboBox.ItemTemplate>
<DataTemplate>
<TextBlock>
<Run Text="{Binding Key, Mode=OneWay}"/>
<Run Text=" - "/>
<Run Text="{Binding Value, Mode=OneWay}"/>
</TextBlock>
</DataTemplate>
</ComboBox.ItemTemplate>
</ComboBox>

Answer 2

You can do for instance so:
<ComboBox x:Name="cmb1" ItemsSource="{Binding YourDictionary}" SelectedValuePath="Key">
<ComboBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding Key}"/>
<TextBlock Text="-"/>
<TextBlock Text="{Binding Value}"/>
</StackPanel>
</DataTemplate>
</ComboBox.ItemTemplate>
</ComboBox>
<TextBox Text="{Binding SelectedValue, ElementName=cmb1}"/>

Answer 3

One more way you can go is to use value converter:
<ComboBox x:Name="cmb1" ItemsSource="{Binding YourDictionary}" SelectedValuePath="Key">
<ComboBox.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding Converter={StaticResource YourConverter}}"/>
</DataTemplate>
</ComboBox.ItemTemplate>
</ComboBox>
<TextBox Text="{Binding SelectedValue, ElementName=cmb1}"/>
public class KeyValueConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
if (value is KeyValuePair<int, object> obj)//use your types here
{
return obj.Key.ToString() + "-" + obj.Value.ToString();
}
return value;
}
public object ConvertBack(object value, Type targetTypes, object parameter, CultureInfo culture)
{
throw new NotImplementedException("One way converter.");
}
}