WPF : Handling Event on View From ViewModel

1. First Create Event Handler in ViewModel 

LoginViewModel

   public event EventHandler LoginCompleted = delegate { };
   public void OnLoginCompleted()
   {
        LoginCompleted(this, new EventArgs());
   }

2. Handle ViewModel Event in View


LoginView.Xaml.cs

public LoginView()

{

   this.DataContext = new LoginViewModel(); 

   (this.DataContext as LoginViewModel).LoginCompleted += 

              new EventHandler(LoginViewModel_LoginCompleted); 

}

void LoginViewModel_LoginCompleted(object sender, EventArgs e)
{
   //your Coode goes here         
}