Question

How would one achieve mixing bound values with constant text in a WPF bound control?

For example, say I have a form displaying orders, and I want a label that displays text like ‘Order ID 1234’.

I’ve tried things like:

text='Order ID {Binding ....}' 

Is this achievable, or do I have to do something like having more than one label in a flow control?

Answer 1

If you’re using 3.5 SP1, you can use the StringFormat property on the binding:

<Label Content='{Binding Order.ID, StringFormat=Order ID \{0\}}'/> 

Otherwise, use a converter:

<local:StringFormatConverter x:Key='StringFormatter' StringFormat='Order ID {0}' /> <Label Content='{Binding Order.ID, Converter=StringFormatter}'/> 

With StringFormatConverter being an IValueConverter:

[ValueConversion(typeof(object), typeof(string))] public class StringFormatConverter : IValueConverter {     public string StringFormat { get; set; }      public object Convert(object value, Type targetType,                           object parameter, CultureInfo culture) {          if (string.IsNullOrEmpty(StringFormat)) return '';          return string.Format(StringFormat, value);     }       public object ConvertBack(object value, Type targetType,                               object parameter, CultureInfo culture)     {         throw new NotSupportedException();     } 

That’ll do the trick.

[Edit : Change the Text property to Content]