透明或半透明的面板控制 [英] Transparent or semitransparent panel control

问题描述

有没有什么办法，使面板透明或半透明？我还没有发现任何适当的属性设置为透明的面板。

Is there any way to make a panel transparent or semi transparent? I haven't found any appropriate property to set transparency for a panel.

我也试图与电网WPF控件（网格背景和控制的背景设置为透明），并将其放置在普通窗口的形式，但是当我把这个正常的Windows窗体（不是WPF）控制我没有得到正确的透明度。

I was also trying to make a WPF control with grid (grid background and control background was set to transparent) and place it on normal windows form, but when I put this control on normal Windows Form(not WPF) I don't get the proper transparency.

推荐答案

如果你的显示器是非常静态的，你可以做到这一点，实现半透明度（源）：

If your display is pretty much static, you can do this to achieve semi-transparency (Source):

class SeeThroughPanel : Panel
{
    public SeeThroughPanel()
    {
    }

    protected override CreateParams CreateParams {
        get {
            var cp = base.CreateParams;
            cp.ExStyle |= 0x00000020;
            return cp;
        }
    }

    protected override void OnPaint(PaintEventArgs e)
    {
        //base.OnPaint(e);
        e.Graphics.FillRectangle(new SolidBrush(Color.FromArgb(50, 0, 0, 0)), this.ClientRectangle);
    }
}

不过，这种方法也不是没有问题，如果你需要在你的半透明控制动态渲染。请参见我已经张贴了这个问题。希望它有一天得到回答。

But, this approach is not without problems if you need dynamic rendering on your semi-transparent control. See this question which I have posted. Hope it gets answered someday.

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