图片切割就是把一幅大图片按用户要求切割成多幅小图片。dotnet环境下系统提供了GDI+类库，为图像操作处理提供了方便的接口。
下面是图像切割小程序：
public class ImageManager { /// <summary> /// 图像切割 /// </summary> /// <param name="url">图像文件名称</param> /// <param name="width">切割后图像宽度</param> /// <param name="height">切割后图像高度</param> /// <param name="savePath">切割后图像文件保存路径</param> /// <param name="fileExt">切割后图像文件扩展名</param> public static void Cut(string url, int width, int height,string savePath,string fileExt,string logofile) { Bitmap bitmap = new Bitmap(url); Decimal MaxRow = Math.Ceiling((Decimal)bitmap.Height / height); Decimal MaxColumn = Math.Ceiling((decimal)bitmap.Width / width); for (decimal i = 0; i < MaxRow; i++) { for (decimal j = 0; j < MaxColumn; j++) { string filename = i.ToString() + "," + j.ToString() + "." + fileExt; Bitmap bmp = new Bitmap(width, height); for (int offsetX = 0; offsetX < width; offsetX++) { for (int offsetY = 0; offsetY < height; offsetY++) { if (((j * width + offsetX) < bitmap.Width) && ((i * height + offsetY) < bitmap.Height)) { bmp.SetPixel(offsetX, offsetY, bitmap.GetPixel((int)(j * width + offsetX), (int)(i * height + offsetY))); } } } Graphics g = Graphics.FromImage(bmp); g.DrawString("脚本之家", new Font("黑体", 20), new SolidBrush(Color.FromArgb(70, Color.WhiteSmoke)), 60, height/2);//加水印 ImageFormat format = ImageFormat.Png; switch (fileExt.ToLower()) { case "png": format = ImageFormat.Png; break; case "bmp": format = ImageFormat.Bmp; break; case "gif": format = ImageFormat.Gif; break; } bmp.Save(savePath+"//" + filename,format); } } } }