Draw a PNG Image on the Server

Question

I have a need to create an Image at run time and save it on the server. For the sake of example, lets say I'm creating just a basic rectangle. This rectangle image will be a .png file. How would I do this with C# code in an ASP.NET MVC 4 app?

I'm trying to learn how to draw basic images in C# however, I'm not sure where to start. Can someone point me to a basic sample of drawing a a rectangle?

score 2 · Accepted Answer · edited May 23 '17 at 10:32

2

Here is the sample for you to start.

Source: How to generate a PNG file with C#?

MSDN: Bitmap Class, Graphics Class

using (Bitmap b = new Bitmap(50, 50)) {
  using (Graphics g = Graphics.FromImage(b)) {
    g.Clear(Color.Green);
 }
  b.Save(@"C:\green.png", ImageFormat.Png);
}

edited May 23 '17 at 10:32

Community

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answered Jan 27 '13 at 15:48

Hary

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score 0 · Answer 2 · answered Jan 27 '13 at 15:49

Hope this help:

Bitmap img = new Bitmap(300, 50);
Graphics g = Graphics.FromImage(img);
g.FillRectangle(Brushes.White, 1, 1, 298, 48);
// render the image to output stream
img.Save(Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);
//clean up
g.Dispose();
img.Dispose();

Draw a PNG Image on the Server

2 Answers2