如何用C#写一个透明控件?(WinForm程序)
我在一个panel里放了一个控件A,我还想在这个panel里放一个透明的控件B,然后B控件执行BringToFront方法后希望仍能看见它后面的A控件,请问如何做这个透明...
我在一个panel里放了一个控件A,我还想在这个panel里放一个透明的控件B,然后B控件执行BringToFront方法后希望仍能看见它后面的A控件,请问如何做这个透明的B控件呢?谢谢!
BackColor我试过了,我让它等于transparent,但是达不到透明的效果,只是显示了父控件的背景色,所以大家帮帮忙! 展开
BackColor我试过了,我让它等于transparent,但是达不到透明的效果,只是显示了父控件的背景色,所以大家帮帮忙! 展开
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首先先从System.Windows.Forms.Panel 继承一个自定义控件,然后在控件的构造函数中添加下面的代码 :
SetStyle(ControlStyles.UserPaint, true);
SetStyle(ControlStyles.SupportsTransparentBackColor, true);
this.BackColor = Color.Transparent;
其中调用SetStyle函数进行设置ControlStyles.SupportsTransparentBackColor为true
然后设置控件的背景颜色为透明Color.Transparent.
把设计好的控件添加到WINFORM中来,发现自定义控件可以在其他控件上面时可以变成透明,但是如果放在图片控件上面却没有透明效果,为了这个问题,研究了半天,后来终于发现只需要简单的设置一下控件的parent属性为图片控件即可.代码如下 :
Panel21.Parent = pictureBox1;
SetStyle(ControlStyles.UserPaint, true);
SetStyle(ControlStyles.SupportsTransparentBackColor, true);
this.BackColor = Color.Transparent;
其中调用SetStyle函数进行设置ControlStyles.SupportsTransparentBackColor为true
然后设置控件的背景颜色为透明Color.Transparent.
把设计好的控件添加到WINFORM中来,发现自定义控件可以在其他控件上面时可以变成透明,但是如果放在图片控件上面却没有透明效果,为了这个问题,研究了半天,后来终于发现只需要简单的设置一下控件的parent属性为图片控件即可.代码如下 :
Panel21.Parent = pictureBox1;
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