正文

FtpHelper实现ftp服务器文件读写操作(C#)

︶ㄣSDDLL学院 メ
SDDLL学院V管理员 / 阅读
0708
这篇文章主要为大家详细介绍了FtpHelper实现ftp服务器文件读写操作，具有一定的参考价值，感兴趣的小伙伴们可以参考一下

这篇文章主要为大家详细介绍了FtpHelper实现ftp服务器文件读写操作，具有一定的参考价值，感兴趣的小伙伴们可以参考一下

最近做了一个项目，需要读取ftp服务器上的文件，于是参考了网上提供的一些帮组方法，使用过程中，出现一些小细节问题，于是本人做了一些修改，拿来分享一下

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Net;
 using System.IO;
 using System.Threading;
using System.Configuration;
 
 namespace FtpSyn
 {
   public class FtpHelper
   {
     //基本设置 ftp://400:ZOina2017@192.168.10.17/400backup
     static private string path = @"ftp://" + ConfigurationManager.AppSettings["FtpServerIP"].ToString() + "/";  //目标路径
     static private string ftpip = ConfigurationManager.AppSettings["FtpServerIP"].ToString();  //ftp IP地址
     static private string username = ConfigurationManager.AppSettings["FtpUserName"].ToString();  //ftp用户名
     static private string password = ConfigurationManager.AppSettings["FtpPassWord"].ToString();  //ftp密码
    
     //获取ftp上面的文件和文件夹
     public static string[] GetFileList(string dir)
     {
       string[] downloadFiles;
       StringBuilder result = new StringBuilder();
       FtpWebRequest request;
       try
       {
         request = (FtpWebRequest)FtpWebRequest.Create(new Uri(path + dir));
         request.UseBinary = true;
         request.Credentials = new NetworkCredential(username, password);//设置用户名和密码
         request.Method = WebRequestMethods.Ftp.ListDirectory;
         request.UseBinary = true;
         request.UsePassive = false; //选择主动还是被动模式 , 这句要加上的。
         request.KeepAlive = false;//一定要设置此属性，否则一次性下载多个文件的时候，会出现异常。
         WebResponse response = request.GetResponse();
         StreamReader reader = new StreamReader(response.GetResponseStream());
 
         string line = reader.ReadLine();
         while (line != null)
         {
           result.Append(line);
           result.Append("\n");
           line = reader.ReadLine();
         }
 
         result.Remove(result.ToString().LastIndexOf('\n'), 1);
         reader.Close();
         response.Close();
         return result.ToString().Split('\n');
       }
       catch (Exception ex)
       {
         LogHelper.writeErrorLog("获取ftp上面的文件和文件夹：" + ex.Message);
         downloadFiles = null;
         return downloadFiles;
       }
     }
 
 
 
 
     /// <summary>
     /// 从ftp服务器上获取文件并将内容全部转换成string返回
     /// </summary>
     /// <param name="fileName"></param>
     /// <param name="dir"></param>
     /// <returns></returns>
     public static string GetFileStr(string fileName, string dir)
     {
       FtpWebRequest reqFTP;
       try
       {
         reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(path + dir + "/" + fileName));
         reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
         reqFTP.UseBinary = true;
         reqFTP.Credentials = new NetworkCredential(username, password);
         reqFTP.UsePassive = false; //选择主动还是被动模式 , 这句要加上的。
         reqFTP.KeepAlive = false;//一定要设置此属性，否则一次性下载多个文件的时候，会出现异常。
         FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
         Stream ftpStream = response.GetResponseStream();
         StreamReader reader = new StreamReader(ftpStream);
         string fileStr = reader.ReadToEnd();
 
         reader.Close();
         ftpStream.Close();
         response.Close();
         return fileStr;
       }
       catch (Exception ex)
       {
         LogHelper.writeErrorLog("获取ftp文件并读取内容失败：" + ex.Message);
         return null;
       }
     }
 
 
     /// <summary>
     /// 获取文件大小
     /// </summary>
     /// <param name="file">ip服务器下的相对路径</param>
     /// <returns>文件大小</returns>
     public static int GetFileSize(string file)
     {
       StringBuilder result = new StringBuilder();
       FtpWebRequest request;
       try
       {
         request = (FtpWebRequest)FtpWebRequest.Create(new Uri(path + file));
         request.UseBinary = true;
         request.Credentials = new NetworkCredential(username, password);//设置用户名和密码
         request.Method = WebRequestMethods.Ftp.GetFileSize;
 
         int dataLength = (int)request.GetResponse().ContentLength;
 
         return dataLength;
       }
       catch (Exception ex)
       {
         Console.WriteLine("获取文件大小出错：" + ex.Message);
         return -1;
       }
     }
 
     /// <summary>
     /// 文件上传
     /// </summary>
     /// <param name="filePath">原路径（绝对路径）包括文件名</param>
     /// <param name="objPath">目标文件夹：服务器下的相对路径 不填为根目录</param>
     public static void FileUpLoad(string filePath,string objPath="")
     {
       try
       {
         string url = path;
         if(objPath!="")
           url += objPath + "/";
         try
         {
 
           FtpWebRequest reqFTP = null;
           //待上传的文件 （全路径）
           try
           {
             FileInfo fileInfo = new FileInfo(filePath);
             using (FileStream fs = fileInfo.OpenRead())
             {
               long length = fs.Length;
               reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(url + fileInfo.Name));
 
               //设置连接到FTP的帐号密码
               reqFTP.Credentials = new NetworkCredential(username, password);
               //设置请求完成后是否保持连接
               reqFTP.KeepAlive = false;
               //指定执行命令
               reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
               //指定数据传输类型
               reqFTP.UseBinary = true;
 
               using (Stream stream = reqFTP.GetRequestStream())
               {
                 //设置缓冲大小
                 int BufferLength = 5120;
                 byte[] b = new byte[BufferLength];
                 int i;
                 while ((i = fs.Read(b, 0, BufferLength)) > 0)
                 {
                   stream.Write(b, 0, i);
                 }
                 Console.WriteLine("上传文件成功");
               }
             }
           }
           catch (Exception ex)
           {
             Console.WriteLine("上传文件失败错误为" + ex.Message);
           }
           finally
           {
 
           }
         }
         catch (Exception ex)
         {
           Console.WriteLine("上传文件失败错误为" + ex.Message);
         }
         finally
         {
 
         }
       }
       catch (Exception ex)
       {
         Console.WriteLine("上传文件失败错误为" + ex.Message);
       }
     }
     
     /// <summary>
     /// 删除文件
     /// </summary>
     /// <param name="fileName">服务器下的相对路径 包括文件名</param>
     public static void DeleteFileName(string fileName)
     {
       try
       {
         FileInfo fileInf = new FileInfo(ftpip +""+ fileName);
         string uri = path + fileName;
         FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
         // 指定数据传输类型
         reqFTP.UseBinary = true;
         // ftp用户名和密码
         reqFTP.Credentials = new NetworkCredential(username, password);
         // 默认为true，连接不会被关闭
         // 在一个命令之后被执行
         reqFTP.KeepAlive = false;
         // 指定执行什么命令
         reqFTP.Method = WebRequestMethods.Ftp.DeleteFile;
         FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
         response.Close();
       }
       catch (Exception ex)
       {
         Console.WriteLine("删除文件出错：" + ex.Message);
       }
     }
     
     /// <summary>
     /// 新建目录 上一级必须先存在
     /// </summary>
     /// <param name="dirName">服务器下的相对路径</param>
     public static void MakeDir(string dirName)
     {
       try
       {
         string uri = path + dirName;
         FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
         // 指定数据传输类型
         reqFTP.UseBinary = true;
         // ftp用户名和密码
         reqFTP.Credentials = new NetworkCredential(username, password);
         reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory;
         FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
         response.Close();
       }
       catch (Exception ex)
       {
         Console.WriteLine("创建目录出错：" + ex.Message);
       }
     }
     
     /// <summary>
     /// 删除目录 上一级必须先存在
     /// </summary>
     /// <param name="dirName">服务器下的相对路径</param>
     public static void DelDir(string dirName)
     {
       try
       {
         string uri = path + dirName;
         FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
         // ftp用户名和密码
         reqFTP.Credentials = new NetworkCredential(username, password);
         reqFTP.Method = WebRequestMethods.Ftp.RemoveDirectory;
         FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
         response.Close();
       }
       catch (Exception ex)
       {
         Console.WriteLine("删除目录出错：" + ex.Message);
       }
     }
 
     /// <summary>
     /// 从ftp服务器上获得文件夹列表
     /// </summary>
     /// <param name="RequedstPath">服务器下的相对路径</param>
     /// <returns></returns>
     public static List<string> GetDirctory(string RequedstPath)
     {
       List<string> strs = new List<string>();
       try
       {
         string uri = path + RequedstPath;  //目标路径 path为服务器地址
         FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
         // ftp用户名和密码
         reqFTP.Credentials = new NetworkCredential(username, password);
         reqFTP.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
         WebResponse response = reqFTP.GetResponse();
         StreamReader reader = new StreamReader(response.GetResponseStream());//中文文件名
 
         string line = reader.ReadLine();
         while (line != null)
         {
           if (line.Contains("<DIR>"))
           {
             string msg = line.Substring(line.LastIndexOf("<DIR>")+5).Trim();
             strs.Add(msg);
           }
           line = reader.ReadLine();
         }
         reader.Close();
         response.Close();
         return strs;
       }
       catch (Exception ex)
       {
         Console.WriteLine("获取目录出错：" + ex.Message);
       }
       return strs;
     }
 
     /// <summary>
     /// 从ftp服务器上获得文件列表
     /// </summary>
     /// <param name="RequedstPath">服务器下的相对路径</param>
     /// <returns></returns>
     public static List<string> GetFile(string RequedstPath)
     {
       List<string> strs = new List<string>();
       try
       {
         string uri = path + RequedstPath;  //目标路径 path为服务器地址
         FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
         // ftp用户名和密码
         reqFTP.Credentials = new NetworkCredential(username, password);
         reqFTP.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
         WebResponse response = reqFTP.GetResponse();
         StreamReader reader = new StreamReader(response.GetResponseStream());//中文文件名
 
         string line = reader.ReadLine();
         while (line != null)
         {
           if (!line.Contains("<DIR>"))
           {
             string msg = line.Substring(39).Trim();
             strs.Add(msg);
           }
           line = reader.ReadLine();
         }
         reader.Close();
         response.Close();
         return strs;
       }
       catch (Exception ex)
       {
         Console.WriteLine("获取文件出错：" + ex.Message);
       }
       return strs;
     }
   
   }
 }

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持米米素材网。