c#使用GDI+简单绘图(二)

        // Create the in-memory bitmap where you will draw the image.
        // This bitmap is 300 pixels wide and 50 pixels high.
        Bitmap image = new Bitmap(300, 50);

        // get the graphics context
        Graphics g = Graphics.FromImage(image);

        // Draw a solid white rectangle.
        // Start from point (1, 1).
        // Make it 298 pixels wide and 48 pixels high.
        g.FillRectangle(Brushes.White, 1, 1, 298, 48);

        // load a font and use it to draw a string
        Font font = new Font("Impact", 20, FontStyle.Regular);
        g.DrawString("This is a test.", font, Brushes.Blue, 10, 5);

        // write the image to the output stream.
        image.Save(Response.OutputStream, System.Drawing.Imaging.ImageFormat.Gif);

        // dispose of the context and the bitmap
        g.Dispose();
        image.Dispose();

        // Create the in-memory bitmap where you will draw the image.
        // This bitmap is 450 pixels wide and 100 pixels high.
        Bitmap image = new Bitmap(450, 100);
        Graphics g = Graphics.FromImage(image);

        // Ensure high-quality curves.
        g.SmoothingMode = SmoothingMode.AntiAlias;

        // Paint the background.
        g.FillRectangle(Brushes.White, 0, 0, 450, 100);

        // Add an ellipse.
        g.FillEllipse(Brushes.PaleGoldenrod, 120, 13, 300, 50);
        g.DrawEllipse(Pens.Green, 120, 13, 299, 49);

        // Draw some text using a fancy font.
        Font font = new Font("Harrington", 20, FontStyle.Bold);
        g.DrawString("Oranges are tasty!", font, Brushes.DarkOrange, 150, 20);

        // Add a graphic from a file.
        System.Drawing.Image orangeImage =
          System.Drawing.Image.FromFile(Server.MapPath("oranges.gif"));
        g.DrawImageUnscaled(orangeImage, 0, 0);

        // Render the image to the output stream.
        image.Save(Response.OutputStream,
         System.Drawing.Imaging.ImageFormat.Jpeg);

        // Clean up.
        g.Dispose();
        image.Dispose();