ASP.NET下载远程图片保存到本地的方法、保存抓取远程图片

以下介绍两种方法：
1.利用WebRequest，WebResponse 类 
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 
//下面直接输出 
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 类 
WebClient my=new WebClient(); 
    byte[] mybyte;   
    mybyte=my.DownloadData("http://www.x .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 
//下面直接输出 
Response.ClearContent(); 
    Response.ContentType="image/gif"; 
    Response.BinaryWrite(mybyte); 
如果是真实的图片地址直接用 
my.DownloadFile("http://www. /eimg/uploadfile/downpig/20098/098215331763.gif","D:\\a.gif");   //保存 
直接可以保存