如何设置面板不透明度... [英] How to set Panel opacity ...

问题描述

我该如何设置面板的不透明度，例如窗体具有不透明度属性.

How can i set opacity of pannel, like for form there is opacity property.

推荐答案

您不能为面板设置不透明度:它是仅是顶层窗口(例如窗体)的功能-它是未为子窗口(例如Panel)启用的硬件功能.

您可以通过将面板背景颜色设置为零的Alpha值来做到这一点，但这不是很好！

You can''t set an opacity for a panel: it''s a function of top level windows (such as forms) only - it is a hardware function that isn''t enabled for child windows such as Panel.

You can - sort of - do it, by setting the panel background colour to an Alpha value of zero, but...it''s not very good!

public frmMain()
    {
    InitializeComponent();
    myPanel.BackColor = Color.FromArgb(0, Color.Black);
    }
protected override void OnPaint(PaintEventArgs e)
    {
    e.Graphics.DrawLine(Pens.Red, 0, 0, Width, Height);
    }

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