Hello,

I need some help about WPF and Databinding.

Let's say I have a ClassA with a member of ClassB. ClassB has again a member, maybe an int:

ClassB
{
  public int MemberOfB { get; set; }
}

ClassA
{
    private ClassB _theB;
    public ClassB MemberOfA
    {
        get {return _theB;}
        set
        {
            _theB = value;

            // Need to do something here...
        }
    }
}

When I have a Databinding in XAML like this:

<TextBox Text="{Binding Path=MemberOfA.MemberOfB}"/>

Where the Datacontext of the Textbox is an object of type ClassA.

As you can see, i need to do some computations in the setter of MemberOfA in ClassA. But with the databinding above, this setter is of course never called, because it binds to the member of ClassB.

So, how can i get to be informed if the MemberOfA changes (when I Type something into the Textbox)? Are there any best practices? (Didn't check the code in Visual Studio, so there may be some syntax errors).

Thanks, Walter