简体繁体 English

透明色wpf

[英]Transparent colors wpf

原文 2010-12-24 16:54:42 8 2 wpf/ wpf-controls

I have some Label control that sits on some image , and i want to give that control back ground Background="LightGray" but i also want it to be Transparent . 我有一些Label控件位于某个图像上，我想让控件返回地面Background =“LightGray”，但我也希望它是透明的。

of course i can do Background="Transperent" but then i want to have something like green + Transperent . 当然我可以做背景=“Transperent”，但后来我想要像绿色+ Transperent这样的东西。

Any idea how i do that ? 知道我是怎么做到的吗？

Thanks 谢谢

2 个解决方案

You're looking for the Opacity property of your brush. 您正在寻找画笔的不透明度属性。 That should give you the semi-transparency you're looking for. 这应该会给你你正在寻找的半透明度。

A Background property takes Brush instance. Background属性采用Brush实例。 If you analyze the Brush object you can see the first 2 byte is for the Alpha-transparency and the rest is RGB colors. 如果分析Brush对象，则可以看到前2个字节用于Alpha透明度，其余为RGB颜色。 Here if you change 'FF' (255) to '7F'(127) you get half opaque so adjust that value and get your desired one. 如果你将'FF'（255）更改为'7F'（127），你会得到半透明，所以调整该值并得到你想要的值。 I would recommend to use Expression Blend for this kind of editing. 我建议使用Expression Blend进行这种编辑。