How to Access a Button present inside a Custom Control, from the implementing page?

Question

I have my generic.xaml containing the following code:

Answer 1

You just need to add a couple of events to your Control.

 public event EventHandler MovedPrevious
 public event EventHandler MovedNext

Now this are typically implemented like this:-

 protected virtual void OnMovedPrevious(EventArgs e)
 {
   var handler = MovedPrevious;
   if (handler != null)
     handler(this, e);   
 }

 protected virtual void OnMovedNext(EventArgs e)
 {
   var handler = MovedNext;
   if (handler != null)
     handler(this, e);   
 }

Now in your existing click events:-

nextBtn.Click += (obj, Args) =>
{
  customMediaPlayer.Source=new Uri(CustomMediaSource.ToString(),UriKind.RelativeOrAbsolute);  //No idea what this doing
  OnMovedNext(EventArgs.Empty);
};

prevBtn.Click += (obj, Args) =>
{
  customMediaPlayer.Source = new Uri(CustomMediaSource.ToString(), UriKind.RelativeOrAbsolute); //No idea what this is doing either
  OnMovedPrevious(EventArgs.Empty);
};

Now in your consuming code you can do this sort of thing:-

CustomVideoControl myVControl=new CustomVideoControl();
myVControl.MovedNext += (s, args) => { /* deal with next */ };
myVControl.MovedPrevious += (s, args) => { /* deal with previous */ };