Xamarin android按钮事件

Question

I've tried to test Button event but I'm getting NULL referenge error. There are three layouts :Main, simple_fragments and Stock

There are one button (btSearch) and on edittext in the Stock -layout. Now when I try to create click-event:

Button bt= FindViewById(Resources.Id.btSearch)

bt.Click+=Bt_Click; <-- this cause error.

If I put button to main layout and create button event everything works fine.

How create button events to each layout ?

Here is picture from MainActivity

Lets hope that you can see read it.

Answer 1

Going by the comments, you are setting the content view to the wrong layout.

From your comment:

SetContentView(Resource.Layout.Main);

Yet, going from your post, the btSearch button is on the Stock layout. So you need to change that line to...

SetContentView(Resource.Layout.Stock);

FindViewById will return null if the view isn't found in the layout set in SetContentView .