完整代碼如下：
//圖片路徑
String oldPath = Server.MapPath("~/aaaa.jpg");
//新圖片路徑
String newPath = System.IO.Path.GetExtension(oldPath);
//設(shè)置截取的坐標(biāo)和大小
int x = 0, y = 10, width = 200, height = 200;
//計(jì)算新的文件名，在舊文件名后加_new
newPath = oldPath.Substring(0, oldPath.Length - newPath.Length) + "_new" + newPath;
Response.Write(oldPath);
Response.Write("<br>");
Response.Write(newPath);
Response.Write("<br>");
//定義截取矩形
System.Drawing.Rectangle cropArea = new System.Drawing.Rectangle(x, y, width, height); //要截取的區(qū)域大小
//加載圖片
System.Drawing.Image img = System.Drawing.Image.FromStream(new System.IO.MemoryStream(System.IO.File.ReadAllBytes(oldPath)));
//判斷超出的位置否
if ((img.Width < x + width) || img.Height < y + height)
{
Response.Write("截取的區(qū)域超過(guò)了圖片本身的高度、寬度.");
img.Dispose();
return;
}
//定義Bitmap對(duì)象
System.Drawing.Bitmap bmpImage = new System.Drawing.Bitmap(img);
//進(jìn)行裁剪
System.Drawing.Bitmap bmpCrop = bmpImage.Clone(cropArea, bmpImage.PixelFormat);
//保存成新文件
bmpCrop.Save(newPath);
//釋放對(duì)象
img.Dispose();
bmpCrop.Dispose();
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