WP8.1不透明隐藏的AppBar / CommandBar

Question

How do I achieve opaque CommandBar/AppBar while it's hidden in WP8.1? CommandBar's property Opacity works just fine, but only when AppBar is opened. Though even then you can see non-opaque rectangle at the bottom. I want my AppBar to be opaque at all times, even when ClosedDisplayMode is set to Minimal.

Answer 1

[UPDATED] "This happens because when you create a CommandBar an automatic margin is created for the ContentGrid to free a space below it for the app bar. Give the Main Grid a bottom margin by -24 and your content will show behind the command bar Like this: Margin="0,0,0,-24"

[ORIGINAL COMMENT] I guess it is not applicable to do it with the control itself. But the workaround is to give it an opaque color. You can give the command bar a color but reduce its alpha value that controls the color's transparency.

Example: that's the Color code of the "Red" color with 80% transparency: #CCFF0000