C# FTP操作类（获取文件和文件夹列表）

一.如何获取某一目录下的文件和文件夹列表。

由于FtpWebRequest类只提供了WebRequestMethods.Ftp.ListDirectory方式和WebRequestMethods.Ftp.ListDirectoryDetails方式。这个方法获取到的是包含文件列表和文件夹列表的信息。并不是单单只包含某一类。为此我们需要分析获取信息的特点。分析发现，对于文件夹会有“<DIR>”这一项，而文件没有。所以我们可以根据这个来区分。一下分别是获取文件列表和文件夹列表的代码：

1.获取文件夹列表：

 1 /// <summary>
 2 /// 从ftp服务器上获得文件夹列表
 3 /// </summary>
 4 /// <param name="RequedstPath">服务器下的相对路径</param>
 5 /// <returns></returns>
 6 public static List<string> GetDirctory(string RequedstPath)
 7 {
 8     List<string> strs = new List<string>();
 9     try
10     {
11         string uri = path + RequedstPath;   //目标路径 path为服务器地址
12         FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
13         // ftp用户名和密码
14         reqFTP.Credentials = new NetworkCredential(username, password);
15         reqFTP.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
16         WebResponse response = reqFTP.GetResponse();
17         StreamReader reader = new StreamReader(response.GetResponseStream());//中文文件名
18 
19         string line = reader.ReadLine();
20         while (line != null)
21         {
22             if (line.Contains("<DIR>"))
23             {
24                 string msg = line.Substring(line.LastIndexOf("<DIR>")+5).Trim();
25                 strs.Add(msg);
26             }
27             line = reader.ReadLine();
28         }
29         reader.Close();
30         response.Close();
31         return strs;
32     }
33     catch (Exception ex)
34     {
35         Console.WriteLine("获取目录出错：" + ex.Message);
36     }
37     return strs;
38 }
View Code

2.获取文件列表

 1 /// <summary>
 2 /// 从ftp服务器上获得文件列表
 3 /// </summary>
 4 /// <param name="RequedstPath">服务器下的相对路径</param>
 5 /// <returns></returns>
 6 public static List<string> GetFile(string RequedstPath)
 7 {
 8     List<string> strs = new List<string>();
 9     try
10     {
11         string uri = path + RequedstPath;   //目标路径 path为服务器地址
12         FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
13         // ftp用户名和密码
14         reqFTP.Credentials = new NetworkCredential(username, password);
15         reqFTP.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
16         WebResponse response = reqFTP.GetResponse();
17         StreamReader reader = new StreamReader(response.GetResponseStream());//中文文件名
18 
19         string line = reader.ReadLine();
20         while (line != null)
21         {
22             if (!line.Contains("<DIR>"))
23             {
24                 string msg = line.Substring(39).Trim();
25                 strs.Add(msg);
26             }
27             line = reader.ReadLine();
28         }
29         reader.Close();
30         response.Close();
31         return strs;
32     }
33     catch (Exception ex)
34     {
35         Console.WriteLine("获取文件出错：" + ex.Message);
36     }
37     return strs;
38 }
View Code

二.其他代码

  1 using System;
  2 using System.Collections.Generic;
  3 using System.Linq;
  4 using System.Text;
  5 using System.Net;
  6 using System.IO;
  7 using System.Threading;
  8 
  9 namespace FtpSyn
 10 {
 11     static public class FtpHelper
 12     {
 13         //基本设置
 14         static private string path = @"ftp://" + Helper.GetAppConfig("obj") + "/";    //目标路径
 15         static private string ftpip =Helper.GetAppConfig("obj");    //ftp IP地址
 16         static private string username = Helper.GetAppConfig("username");   //ftp用户名
 17         static private string password = Helper.GetAppConfig("password");   //ftp密码
 18 
 19         //获取ftp上面的文件和文件夹
 20         public static string[] GetFileList(string dir)
 21         {
 22             string[] downloadFiles;
 23             StringBuilder result = new StringBuilder();
 24             FtpWebRequest request;
 25             try
 26             {
 27                 request = (FtpWebRequest)FtpWebRequest.Create(new Uri(path));
 28                 request.UseBinary = true;
 29                 request.Credentials = new NetworkCredential(username, password);//设置用户名和密码
 30                 request.Method = WebRequestMethods.Ftp.ListDirectory;
 31                 request.UseBinary = true;
 32 
 33                 WebResponse response = request.GetResponse();
 34                 StreamReader reader = new StreamReader(response.GetResponseStream());
 35 
 36                 string line = reader.ReadLine();
 37                 while (line != null)
 38                 {
 39                     result.Append(line);
 40                     result.Append("
");
 41                     Console.WriteLine(line);
 42                     line = reader.ReadLine();
 43                 }
 44                 // to remove the trailing '
'
 45                 result.Remove(result.ToString().LastIndexOf('
'), 1);
 46                 reader.Close();
 47                 response.Close();
 48                 return result.ToString().Split('
');
 49             }
 50             catch (Exception ex)
 51             {
 52                 Console.WriteLine("获取ftp上面的文件和文件夹：" + ex.Message);
 53                 downloadFiles = null;
 54                 return downloadFiles;
 55             }
 56         }
 57 
 58         /// <summary>
 59         /// 获取文件大小
 60         /// </summary>
 61         /// <param name="file">ip服务器下的相对路径</param>
 62         /// <returns>文件大小</returns>
 63         public static int GetFileSize(string file)
 64         {
 65             StringBuilder result = new StringBuilder();
 66             FtpWebRequest request;
 67             try
 68             {
 69                 request = (FtpWebRequest)FtpWebRequest.Create(new Uri(path + file));
 70                 request.UseBinary = true;
 71                 request.Credentials = new NetworkCredential(username, password);//设置用户名和密码
 72                 request.Method = WebRequestMethods.Ftp.GetFileSize;
 73 
 74                 int dataLength = (int)request.GetResponse().ContentLength;
 75 
 76                 return dataLength;
 77             }
 78             catch (Exception ex)
 79             {
 80                 Console.WriteLine("获取文件大小出错：" + ex.Message);
 81                 return -1;
 82             }
 83         }
 84 
 85         /// <summary>
 86         /// 文件上传
 87         /// </summary>
 88         /// <param name="filePath">原路径（绝对路径）包括文件名</param>
 89         /// <param name="objPath">目标文件夹：服务器下的相对路径 不填为根目录</param>
 90         public static void FileUpLoad(string filePath,string objPath="")
 91         {
 92             try
 93             {
 94                 string url = path;
 95                 if(objPath!="")
 96                     url += objPath + "/";
 97                 try
 98                 {
 99 
100                     FtpWebRequest reqFTP = null;
101                     //待上传的文件 （全路径）
102                     try
103                     {
104                         FileInfo fileInfo = new FileInfo(filePath);
105                         using (FileStream fs = fileInfo.OpenRead())
106                         {
107                             long length = fs.Length;
108                             reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(url + fileInfo.Name));
109 
110                             //设置连接到FTP的帐号密码
111                             reqFTP.Credentials = new NetworkCredential(username, password);
112                             //设置请求完成后是否保持连接
113                             reqFTP.KeepAlive = false;
114                             //指定执行命令
115                             reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
116                             //指定数据传输类型
117                             reqFTP.UseBinary = true;
118 
119                             using (Stream stream = reqFTP.GetRequestStream())
120                             {
121                                 //设置缓冲大小
122                                 int BufferLength = 5120;
123                                 byte[] b = new byte[BufferLength];
124                                 int i;
125                                 while ((i = fs.Read(b, 0, BufferLength)) > 0)
126                                 {
127                                     stream.Write(b, 0, i);
128                                 }
129                                 Console.WriteLine("上传文件成功");
130                             }
131                         }
132                     }
133                     catch (Exception ex)
134                     {
135                         Console.WriteLine("上传文件失败错误为" + ex.Message);
136                     }
137                     finally
138                     {
139 
140                     }
141                 }
142                 catch (Exception ex)
143                 {
144                     Console.WriteLine("上传文件失败错误为" + ex.Message);
145                 }
146                 finally
147                 {
148 
149                 }
150             }
151             catch (Exception ex)
152             {
153                 Console.WriteLine("上传文件失败错误为" + ex.Message);
154             }
155         }
156         
157         /// <summary>
158         /// 删除文件
159         /// </summary>
160         /// <param name="fileName">服务器下的相对路径 包括文件名</param>
161         public static void DeleteFileName(string fileName)
162         {
163             try
164             {
165                 FileInfo fileInf = new FileInfo(ftpip +""+ fileName);
166                 string uri = path + fileName;
167                 FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
168                 // 指定数据传输类型
169                 reqFTP.UseBinary = true;
170                 // ftp用户名和密码
171                 reqFTP.Credentials = new NetworkCredential(username, password);
172                 // 默认为true，连接不会被关闭
173                 // 在一个命令之后被执行
174                 reqFTP.KeepAlive = false;
175                 // 指定执行什么命令
176                 reqFTP.Method = WebRequestMethods.Ftp.DeleteFile;
177                 FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
178                 response.Close();
179             }
180             catch (Exception ex)
181             {
182                 Console.WriteLine("删除文件出错：" + ex.Message);
183             }
184         }
185         
186         /// <summary>
187         /// 新建目录 上一级必须先存在
188         /// </summary>
189         /// <param name="dirName">服务器下的相对路径</param>
190         public static void MakeDir(string dirName)
191         {
192             try
193             {
194                 string uri = path + dirName;
195                 FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
196                 // 指定数据传输类型
197                 reqFTP.UseBinary = true;
198                 // ftp用户名和密码
199                 reqFTP.Credentials = new NetworkCredential(username, password);
200                 reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory;
201                 FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
202                 response.Close();
203             }
204             catch (Exception ex)
205             {
206                 Console.WriteLine("创建目录出错：" + ex.Message);
207             }
208         }
209         
210         /// <summary>
211         /// 删除目录 上一级必须先存在
212         /// </summary>
213         /// <param name="dirName">服务器下的相对路径</param>
214         public static void DelDir(string dirName)
215         {
216             try
217             {
218                 string uri = path + dirName;
219                 FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
220                 // ftp用户名和密码
221                 reqFTP.Credentials = new NetworkCredential(username, password);
222                 reqFTP.Method = WebRequestMethods.Ftp.RemoveDirectory;
223                 FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
224                 response.Close();
225             }
226             catch (Exception ex)
227             {
228                 Console.WriteLine("删除目录出错：" + ex.Message);
229             }
230         }
231 
232         /// <summary>
233         /// 从ftp服务器上获得文件夹列表
234         /// </summary>
235         /// <param name="RequedstPath">服务器下的相对路径</param>
236         /// <returns></returns>
237         public static List<string> GetDirctory(string RequedstPath)
238         {
239             List<string> strs = new List<string>();
240             try
241             {
242                 string uri = path + RequedstPath;   //目标路径 path为服务器地址
243                 FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
244                 // ftp用户名和密码
245                 reqFTP.Credentials = new NetworkCredential(username, password);
246                 reqFTP.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
247                 WebResponse response = reqFTP.GetResponse();
248                 StreamReader reader = new StreamReader(response.GetResponseStream());//中文文件名
249 
250                 string line = reader.ReadLine();
251                 while (line != null)
252                 {
253                     if (line.Contains("<DIR>"))
254                     {
255                         string msg = line.Substring(line.LastIndexOf("<DIR>")+5).Trim();
256                         strs.Add(msg);
257                     }
258                     line = reader.ReadLine();
259                 }
260                 reader.Close();
261                 response.Close();
262                 return strs;
263             }
264             catch (Exception ex)
265             {
266                 Console.WriteLine("获取目录出错：" + ex.Message);
267             }
268             return strs;
269         }
270 
271         /// <summary>
272         /// 从ftp服务器上获得文件列表
273         /// </summary>
274         /// <param name="RequedstPath">服务器下的相对路径</param>
275         /// <returns></returns>
276         public static List<string> GetFile(string RequedstPath)
277         {
278             List<string> strs = new List<string>();
279             try
280             {
281                 string uri = path + RequedstPath;   //目标路径 path为服务器地址
282                 FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
283                 // ftp用户名和密码
284                 reqFTP.Credentials = new NetworkCredential(username, password);
285                 reqFTP.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
286                 WebResponse response = reqFTP.GetResponse();
287                 StreamReader reader = new StreamReader(response.GetResponseStream());//中文文件名
288 
289                 string line = reader.ReadLine();
290                 while (line != null)
291                 {
292                     if (!line.Contains("<DIR>"))
293                     {
294                         string msg = line.Substring(39).Trim();
295                         strs.Add(msg);
296                     }
297                     line = reader.ReadLine();
298                 }
299                 reader.Close();
300                 response.Close();
301                 return strs;
302             }
303             catch (Exception ex)
304             {
305                 Console.WriteLine("获取文件出错：" + ex.Message);
306             }
307             return strs;
308         }
309     
310     }
311 }
View Code

转自：http://www.cnblogs.com/rond/archive/2012/07/30/2611295.html

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原文地址：https://www.cnblogs.com/programsky/p/5787638.html