VC# - Drawing an Image to a Control

[Shailesh Appukuttan]

I have a picturebox (imgViewer) which is displaying an image. Now i want to display another image (a smaller one) on top of this image. This is what i was doing: private void btn_Path_Click(object sender, EventArgs e) { Bitmap path = new Bitmap(@"C:\Engg\Path.JPG"); Graphics graph = this.imgViewer.CreateGraphics(); graph.DrawImage(path, 0, 0); graph.Dispose(); } But nothing happens when i push my button (btn_Path). But when i change the code to draw on my form (instead of my picturebox), it works: Graphics graph = this.CreateGraphics(); it properly paints on the form. What is wrong????? How can I paint on my picturebox which is already displaying an image?

[CKnig]

change to: private void btn_Path_Click(object sender, EventArgs e) { Bitmap path = new Bitmap(@"C:\Engg\Path.JPG"); Graphics graph = Graphics.FromImage( this.imgViewer.Image ); graph.DrawImage(path, 0, 0); graph.Dispose(); } This should draw the "Path.JPG" on top of the stored image in the PictureViewer.

[Shailesh Appukuttan]

hey awsome dude.......... ur brilliant. it worked!!!!! could u do me a favour and tell me what the difference was. I mean why was it working for the form and not for the picture box. they are both controls isnt it. Thanks once again!!!!!

[CKnig]

I guess the PictureBox get's an Invalidated message after you painted in it's client-area - so it just did what it should do after it's client-area got invalid - it painted it's internal image in it - and so undid your changes. Even if your code worked - everytime the picturebox would repaint itself your changes would be gone.