c# - WPF TwoWay Binding to a static class Property

Question

There's no problem if Mode=OneWay, but I have this: Class:

namespace Halt
{
    public class ProjectData
    {
            public static string Username {get;set;}
    }
}

And XAML:

xmlns:engine="clr-namespace:Halt.Engine"
<TextBox Name="UsernameTextBox" HorizontalAlignment="Stretch" Margin="10,5,10,0" Height="25"
         Text="{Binding Source={x:Static engine:ProjectData.Username}, Mode=TwoWay}"/>

This dont wanna work because of TwoWay mode. So how to fix it?

Answer 1

Use the static property binding syntax (which is, as far as I know, available since WPF 4.5):

<TextBox Text="{Binding Path=(engine:ProjectData.Username)}"/>

No need to set Mode="TwoWay", as that is the default for the TextBox.Text property anyway.

---

Although not explicitly asked for, you may also want to implement property change notification.

See this answer for how to do it.