C#: Button with transparent png overlay

[thesadguy]

I have a System.Windows.Forms.Button with a BackgroundImage property set to an image (a PNG).

How can I get the transparency to work? Right now, it shows a white block. I'd like it if the white was instead transparent (and took the parent control's colour).

 

[FarligOpptreden]

Isn't there an option to set the background color of the control to "Transparent" under the Web Colors? I haven't touched Windows Forms apps in AGES...

 

[MielieSpoor]

set the background color of the control to "Transparent" under the Web Colors?

Do that yes.

 

[Deenem]

I have a System.Windows.Forms.Button with a BackgroundImage property set to an image (a PNG).

How can I get the transparency to work? Right now, it shows a white block. I'd like it if the white was instead transparent (and took the parent control's colour).

Don't think PNG's support transparency, do they? You might have to use a GIF instead.

 

[MielieSpoor]

Don't think PNG's support transparency, do they?

Where have you been? If you want high quality images with transparency, then png is the way to go. Way better quality than that of a gif image.

 

[FarligOpptreden]

Not only that, but PNG files support alpha channels, meaning that you can have an image with semi-transparent regions (i.e. 50% opacity) as well. The problem is that older browsers don't support PNGs and even newer browsers interpret the alpha channels of the images differently...

If all web browsers standardized (in Utopia perhaps?) then I would be more than happy to only use PNG files for web graphics.