How to set background opacity and border opacity in XAML?

Question

I have a TextBox:

<TextBox x:Name="myTextBox"/> 

The TextBox in code behind has two booleans:

 myTextBox.Background.Opacity = 0;  myTextBox.BorderBrush.Opacity = 0; 

Now this is all good and dandy, but how do I set these two properties in XAML?

Btw, setting:

<TextBox x:Name="myTextBox" Background="#00FFFFFF"/> 

Does not effect the Opacity property. I'd like to specifically set that opacity property in XAML.

Answer 1

You want to do something like this:

<TextBlock Text="foo bar">     <TextBlock.Background>         <SolidColorBrush Color="Azure" Opacity="0.5" />     </TextBlock.Background> </TextBlock> 

Answer 2

Opacity in XAML is defined as a double, not an HTML color triplet.

http://msdn.microsoft.com/en-us/library/system.windows.uielement.opacity.aspx

You'll want to set it like this:

<TextBlock Opacity="0" /> 

You can also use a brush to set it:

<SolidColorBrush Color="#FF295564" Opacity="0.3"/> 

...and then set the background property to your brush.