c#根据路径(url)下载图片


方法一:根据路径下载图片

1
/// <summary> 2 /// 图片另存为 3 /// </summary> 4 /// <param name="url">路径</param> 5 public void ImgSave(string url) 6 { 7   //http://203.156.245.58/sipgl/index.jsp 8   url = "https://pic.cnblogs.com/avatar/1465512/20200617142308.png"; 9   WebRequest imgRequest = WebRequest.Create(url); 10 11   HttpWebResponse res; 12   try 13   { 14     res = (HttpWebResponse)imgRequest.GetResponse(); 15   } 16     catch (WebException ex) 17   { 18 19   res = (HttpWebResponse)ex.Response; 20   } 21 22   if (res.StatusCode.ToString() == "OK") 23   { 24     System.Drawing.Image downImage = System.Drawing.Image.FromStream(imgRequest.GetResponse().GetResponseStream()); 25 26     string deerory = string.Format(@"D:\img\{0}\", DateTime.Now.ToString("yyyy-MM-dd")); 27 28     string fileName = string.Format("{0}.png", DateTime.Now.ToString("HHmmssffff")); 29 30 31   if (!System.IO.Directory.Exists(deerory)) 32   { 33     System.IO.Directory.CreateDirectory(deerory); 34   } 35     downImage.Save(deerory + fileName); 36     downImage.Dispose(); 37   } 38 39 } 40 41

 

 

 

方法二:根据路径下载图片 

 

 1      /// <summary>
 2         /// 下载图片
 3         /// </summary>
 4         /// <param name="picUrl">图片Http地址</param>
 5         /// <param name="savePath">保存路径(本地)</param>
 6         /// <param name="timeOut">Request最大请求时间,如果为-1则无限制</param>
 7         /// <returns></returns>
 8         public  bool DownloadPicture(string picUrl, string savePath, int timeOut = -1)
 9         {
10             picUrl = "https://pic.cnblogs.com/avatar/1465512/20200617142308.png";
11             savePath = "D:/img/"+DateTime.Now.ToString("HHmmssffff")+".jpg";
12             bool value = false;
13             WebResponse response = null;
14             Stream stream = null;
15             try
16             {
17                 HttpWebRequest request = (HttpWebRequest)WebRequest.Create(picUrl);
18                 if (timeOut != -1) request.Timeout = timeOut;
19                 response = request.GetResponse();
20                 stream = response.GetResponseStream();
21                 if (!response.ContentType.ToLower().StartsWith("text/"))
22                     value = SaveBinaryFile(response, savePath);
23             }
24             finally
25             {
26                 if (stream != null) stream.Close();
27                 if (response != null) response.Close();
28             }
29             return value;
30         }
31         private static bool SaveBinaryFile(WebResponse response, string savePath)
32         {
33             bool value = false;
34             byte[] buffer = new byte[1024];
35             Stream outStream = null;
36             Stream inStream = null;
37             try
38             {
39                 if (File.Exists(savePath)) File.Delete(savePath);
40                 outStream = System.IO.File.Create(savePath);
41                 inStream = response.GetResponseStream();
42                 int l;
43                 do
44                 {
45                     l = inStream.Read(buffer, 0, buffer.Length);
46                     if (l > 0) outStream.Write(buffer, 0, l);
47                 } while (l > 0);
48                 value = true;
49             }
50             finally
51             {
52                 if (outStream != null) outStream.Close();
53                 if (inStream != null) inStream.Close();
54             }
55             return value;
56         }

 

 

方法三  根据路径下载图片

 

 1     public Image GetImage(string url,out string imageStrCookie)
 2         {
 3            
 4             HttpWebRequest request = (HttpWebRequest)WebRequest.Create("https://pic.cnblogs.com/avatar/1465512/20200617142308.png");
 5             request.Method = "GET";
 6             WebResponse response = request.GetResponse();
 7             imageStrCookie = "";
 8             if (response.Headers.HasKeys()&&null !=response.Headers["Set-Cookie"])
 9             {
10                 imageStrCookie= response.Headers.Get("Set-Cookie");
11             }
12             return Image.FromStream(response.GetResponseStream());
13             
14         }

 


 


 

 
posted @ 2019-04-19 10:14  聖潔  阅读(21259)  评论(1编辑  收藏  举报