C#抓取网络图片保存到本地详解编程语言

这段代码可以抓取指定的url的网络图片，并保存到本地

public Bitmap Get_img() 
        { 
            Bitmap img = null; 
            HttpWebRequest req; 
            HttpWebResponse res = null; 
                try 
                { 
                    System.Uri httpUrl = new System.Uri("http://xxx.com/xxx.png "); 
                    req = (HttpWebRequest)(WebRequest.Create(httpUrl)); 
                    req.Timeout = 180000; //设置超时值10秒 
                       req.UserAgent = "XXXXX"; 
                    req.Accept = "XXXXXX"; 
                    req.Method = "GET"; 
                    res = (HttpWebResponse)(req.GetResponse());      
                       img = new Bitmap(res.GetResponseStream());//获取图片流                 
                    img.Save(@"E:/" + DateTime.Now.ToFileTime().ToString() + ".png");//随机名 
                } 
  
                catch (Exception ex) 
                { 
                     string aa= ex.Message; 
                } 
                finally 
                { 
                    res.Close(); 
                } 
                     return img; 
        }