WPF binding TextBox and ObservableDictionary<Int64,String> (display String by Id) - wpf

Question

Each item of my Employee's list has Post property. This property is Int64 type. Also, I have some ObservableDictionary<Int64,String> as static property. Each Employe must display the String value by its key.
DataTemplate for Employe item (I deleted the superfluous):
<DataTemplate x:Key="tmpEmploye">
<Border BorderThickness="3" BorderBrush="Gray" CornerRadius="5">
<StackPanel Orientation="Vertical">
<TextBlock Text="{Binding Path=Post}"/>
</StackPanel>
</Border>
</DataTemplate>
But this code displayed the Int64 value, not the String. String for getting static dictionary:
"{Binding Source={x:Static app:Program.Data}, Path=Posts}"
I know how solve it problem for ComboBox, but I don't know for TextBlock. For ComboBox I wrote it (it is works fine):
<ComboBox x:Name="cboPost" x:FieldModifier="public" Grid.Row="4" Grid.Column="1" HorizontalAlignment="Stretch"
VerticalAlignment="Stretch" Margin="2" Grid.ColumnSpan="2"
ItemsSource="{Binding Source={x:Static app:Program.Data}, Path=Posts}" DisplayMemberPath="Value"
SelectedValuePath="Key"
SelectedValue="{Binding Path=Post, Mode=TwoWay}">
</ComboBox>
But how can I solve it for TextBlock?

Answer 1

mmmmm, I'm sure I have developed something for this scenario before but I can't remember or find anything related!
IMO you can use a converter, so you pass your Post (Int64) to the converter and it returns the string value from the dictionary, although it must be a better solution.
[ValueConversion(typeof(Int64), typeof(string))]
public class PostToStringConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
// validation code, etc
return (from p in YourStaticDictionary where p.Key == Convert.ToInt64(value) select p.Value).FirstOrDefault();
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
}
}
XAML:
<Window ...
xmlns:l="clr-namespace:YourConverterNamespace"
...>
<Window.Resources>
<l:PostToStringConverter x:Key="converter" />
</Window.Resources>
<Grid>
<TextBlock Text="{Binding Post, Converter={StaticResource converter}}" />
</Grid>
</Window>