一个在图片上写字的方法

Code:

1. string url = @"F:/123.jpg";   
2.      String src = url;   
3.      String dest = @"F:/xx.jpg";   
4.      int thWidth = 624;//生成缩略图的大小   
5.      int thHeight = 306;   
6.      System.Drawing.Image img = System.Drawing.Image.FromFile(url);//image对象装载源图像   
7.      int srcWidth = img.Width;   
8.      int srcHeight = img.Height;   
9.      Bitmap bmp = new Bitmap(thWidth,thHeight);   
10.      System.Drawing.Graphics gr = System.Drawing.Graphics.FromImage(bmp);   
11.      gr.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;   
12.      gr.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;   
13.      gr.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;   
14.   
15.      System.Drawing.Rectangle rectDestination = new System.Drawing.Rectangle(0,0,thWidth,thHeight);   
16.      gr.DrawImage(img,rectDestination,0,0,srcWidth,srcHeight,GraphicsUnit.Pixel);   
17.      SolidBrush drawBrush = new SolidBrush(Color.Red);   
18.      Font drawFont = new Font("宋体",10,FontStyle.Bold,GraphicsUnit.Millimeter);   
19.      int xPos=img.Height-(img.Height-25);   
20.      int yPos = 3;   
21.      gr.DrawString("你好！",drawFont,drawBrush,xPos,yPos);   
22.      bmp.Save(dest);   
23.      bmp.Dispose();   
24.      img.Dispose();