Opacity on Control

Question

是否可以使控件半透明？

Answer 1

The direct answer to your question is 'No'.

WinForms supports Translucency at the Form level ( Form.Opacity ), but not controls. In cases this was important, I have used layered forms.

If this feature is important and changing frameworks is an option, WPF does support translucent controls.

Answer 2

If the control supports transparent backgrounds, you can use Color.FromArgb() to set a translucent color:

button1.BackColor = Color.FromArgb(100, Color.Red);

Depending on how you want this to work, you would vary the alpha value (to between 0 and 255).