I have a problem.

I have a dialog that has an EditText. The contents of this EditText I caught and put in a ListView, the error is that my variable that receives the contents of the EditText only receives null. move contents of dialog for the listview was to be quiet

code:

{
      ImageView btnAddLinha = (ImageView) objDialogAddNewLine.FindViewById(Resource.Id.btok);
      ImageView btnCancelar =(ImageView)objDialogAddNewLine.FindViewById(Resource.Id.btcancel);

      btnAddLinha.Click + = delegate
      {
         EditText txtNomedaLinha = FindViewById<EditText> (Resource.Id.txtNomedaLinha); <-- txtNomeLinha receive NULL?? Why???

             Item_ListView newItem = new Item_ListView (txtNomedaLinha.Text);
             items.add (newItem);
             adapterListView AdapterListView = new (this, items);
             adapterListView.NotifyDataSetChanged ();
             MainList.Adapter = adapterListView;
       }
}