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();