Question

I have a struct that is defined in a COM library.
In my ViewModel I have created an observable instance of this, and want to bind each member of the struct to different controls in a view.
ConfigStaticDataDetails variable is updated through a delegate in the COM.

Is there a way to catch updates to the members of the struct so that my view reflects the update?

Part of the struct:

public struct ConfigStaticData
{
    public string Callsign;
}

My: variable:

private ConfigStaticData _ConfigStaticDataDetails;
public ConfigStaticData ConfigStaticDataDetails
{
    get
    {
        return _ConfigStaticDataDetails;
    }
    set
    {
        _ConfigStaticDataDetails = value;
        OnPropertyChanged("ConfigStaticDataDetails");
    }
}

And in XAML:

<TextBox Name="ConfigStaticDataCallsignLabelTxt"
         Margin="0,2,0,2"
         Width="230"
         Style="{DynamicResource EditableTextBox}"
         Text="{Binding Source=ConfigStaticDataDetails, Path=Callsign}" />

I have tried different ways, but this my current code (which doesn’t work).

Answer 1

I think you should replace that struct with a class of your own, only using the struct for portability. Structs should be immutable; as such, there is rarely anything interesting to observe. And due to value semantics, each observer might be seeing a different value (or maybe boxed object). Structs and events don’t mix well…