c#使用GDI+簡單繪圖

    // 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();  </pre> 



    // 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();  </pre>