以下介紹兩種方法：

1.利用WebRequest，WebResponse 類

WebRequest wreq=WebRequest.Create("http://www.xueit.com/eimg/uploadfile/downpig/20098/098215331763.gif");

HttpWebResponse wresp=(HttpWebResponse)wreq.GetResponse();

Stream s=wresp.GetResponseStream();

System.Drawing.Image img;

img = System.Drawing.Image.FromStream(s);

img.Save("D:\\aa.gif",ImageFormat.Gif); //保存

//下面直接輸出

MemoryStream ms=new MemoryStream();

img.Save(ms,ImageFormat.Gif);

img.Dispose();

Response.ClearContent();

Response.ContentType="image/gif";

Response.BinaryWrite(ms.ToArray());

 

2.利用 WebClient 類

WebClient my=new WebClient();

byte[] mybyte;

mybyte=my.DownloadData("http://www.xueit.com/eimg/uploadfile/downpig/20098/098215331763.gif"); MemoryStream ms=new MemoryStream(mybyte);

System.Drawing.Image img;

img = System.Drawing.Image.FromStream(ms);

img.Save("D:\\a.gif",ImageFormat.Gif); //保存

//下面直接輸出

Response.ClearContent();

Response.ContentType="image/gif";

Response.BinaryWrite(mybyte);

如果是真實的圖片地址直接用

my.DownloadFile("http://www.xueit.com/eimg/uploadfile/downpig/20098/098215331763.gif","D:\\a.gif"); //保存

直接可以保存

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