C# Windows Phone 8.1中的命令栏

如何在windows phone 8.1（winprt）应用程序中用C#发出辅助命令

现在如何制作这个辅助命令？

只需将AppBarButton放在那里：

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Triied使用该代码，还添加了：CommandBarObject=this.BottomAppBar作为CommandBar；但appbar不显示在页面上。可能缺少什么？@AtifShabeer您是否已设置页面的底部应用程序栏<代码>this.BottomAppBar=CommandBarObject非常感谢，它很有效，如何更改secondary命令文本的fontSize？@AtifShabeer AFAIK您不能更改secondary命令的fontSize。

//WINRT:
CommandBar CommandBarObject = new CommandBar();
AppBarButton FirstBtn = new AppBarButton() { Icon = new BitmapIcon() { UriSource = new Uri("ms-appx:///Assets/first.png") } };
FirstBtn.Label = "First";
FirstBtn.Click += FirstBtn_Click;
FirstBtn.IsEnabled = true;

CommandBarObject.PrimaryCommands.Add(FirstBtn);
CommandBarObject.SecondaryCommands.Add(secondaryCommand);

 CommandBar CommandBarObject = new CommandBar();
 AppBarButton FirstBtn = new AppBarButton() { Icon = new BitmapIcon() { UriSource = new Uri("ms-appx:///Assets/first.png") } };
 FirstBtn.Label = "First";
 FirstBtn.Click += FirstBtn_Click;
 FirstBtn.IsEnabled = true;

 AppBarButton secondaryCommand = new AppBarButton() { Label = "Second", IsEnabled = true } };
 secondaryCommand.Click += FirstBtn_Click;

 CommandBarObject.PrimaryCommands.Add(FirstBtn);
 CommandBarObject.SecondaryCommands.Add(secondaryCommand);