hiding application bar in windows phone

Question

I am trying to hide application bar in windows phone application like this : appbar1.IsVisible=false; but when i debug the code , an error occurs NullReferenceException at the same line . why ? need help

Answer 1

尝试ApplicationBar.IsVisible = false;

Answer 2

You can try

ApplicationBar = ((ApplicationBar)this.Resources["appbar1"])
ApplicationBar.IsVisible = false;

This will solve your issue

Answer 3

您好，你可以试试这个代码。

ApplicationBar _Appbar= ((ApplicationBar)this.Resources["appbar1"]);  _Appbar.IsVisible = false;

Answer 4

ApplicationBarIconButton btn = (ApplicationBarIconButton)ApplicationBar.Buttons[0];
                    btnResend.IsEnabled = false;