Code: Select all
Bitmap img = (Bitmap)Image.FromFile(dlg.FileName);
// Ensure that it's a 32 bit per pixel file
if (img.PixelFormat!=PixelFormat.Format32bppPArgb){
Bitmap temp = new Bitmap(img.Width, img.Height, PixelFormat.Format32bppPArgb);
Graphics g = Graphics.FromImage(temp);
g.DrawImage(img, new Rectangle(0, 0, img.Width, img.Height), 0, 0, img.Width, img.Height, GraphicsUnit.Pixel);
img.Dispose();
g.Dispose();
img = temp;
}
Code: Select all
imports system.drawing
imports system.drawing.imagine
public class Form1
private sub Btn_click()
dim img as bitmap=new bitmap(application.startuppath+"/tux.png")
'cheack pixel format of opend image is 32bppRGB
if not img.pixelformat=pixelformat.format32bppRgb then
dim tmp as bitmap(img.width,img.height,pixelformat.format32bpp)
dim g as graphics=graphics.fromimage(tmp)
g.drawimage(img,new rectangle(0,0,img.width,img.height),0,0,img.width,img.height,graphicsunit.pixel
tmp.save(application.startuppath+"/tux.bmp")
end if
end sub
end class