How to convert PNG to BMP at runtime?

问题

I need to convert PNG file to BMP file on runtime.

I can't do it like

Image dummy = Image.FromFile("image.png"); 
dummy.Save("image.bmp", ImageFormat.Bmp); 

because i can't save the bmp image on the local disk as a file.

Thanks for any help.

回答1:

You can save to stream

using(MemoryStream stream = new MemoryStream())
{
    Dummy.Save(stream, ImageFormat.Bmp); 
}

回答2:

Precise answer given here.

Image Dummy = Image.FromFile("image.png");
Dummy.Save("image.bmp", ImageFormat.Bmp);

Since you don't want to follow this method, you can do it the way Stecya answered.
Just do it this way.

Stream stream;  
Dummy.save(stream, ImageFormat.Bmp)

来源：https://stackoverflow.com/questions/5182178/how-to-convert-png-to-bmp-at-runtime