How does one “disable” a button in WPF using the MVVM pattern?

Question

I\'m trying to get a grasp on WPF and MVVM and have been making good progress. The WPF and MVVM side of things are going well.

However, the XAML and data binding sid

Answer 1

By way of using the command pattern. In your view model:

public class MyViewModel : ViewModel
{
    private readonly ICommand someCommand;

    public MyViewModel()
    {
        this.someCommand = new DelegateCommand(this.DoSomething, this.CanDoSomething);
    }

    public ICommand SomeCommand
    {
        get { return this.someCommand; }
    }

    private void DoSomething(object state)
    {
        // do something here
    }

    private bool CanDoSomething(object state)
    {
        // return true/false here is enabled/disable button
    }
}

In your XAML:

Do Something

Read this post to find out more about the DelegateCommand.