C# FTP操作类

001    using System;
002    using System.Collections.Generic;
003    using System.Text;
004    using System.Net;
005    using System.IO;
006    
007    namespace Utility
008    {
009        public class FtpUpDown
010        {
011    
012            string ftpServerIP;
013    
014            string ftpUserID;
015    
016            string ftpPassword;
017    
018            FtpWebRequest reqFTP;
019    
020            private void Connect(String path)//连接ftp
021            {
022    
023                // 根据uri创建FtpWebRequest对象
024    
025                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(path));
026    
027                // 指定数据传输类型
028    
029                reqFTP.UseBinary = true;
030    
031                // ftp用户名和密码
032    
033                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
034    
035            }
036    
037            public FtpUpDown(string ftpServerIP, string ftpUserID, string ftpPassword)
038            {
039                this.ftpServerIP = ftpServerIP;
040    
041                this.ftpUserID = ftpUserID;
042    
043                this.ftpPassword = ftpPassword;
044            }
045    
046            //都调用这个
047    
048            private string[] GetFileList(string path, string WRMethods)//上面的代码示例了如何从ftp服务器上获得文件列表
049            {
050                string[] downloadFiles;
051                StringBuilder result = new StringBuilder();
052                try
053                {
054                    Connect(path);
055    
056                    reqFTP.Method = WRMethods;
057    
058                    WebResponse response = reqFTP.GetResponse();
059    
060                    StreamReader reader = new StreamReader(response.GetResponseStream(), System.Text.Encoding.Default);//中文文件名
061    
062                    string line = reader.ReadLine();
063    
064                    while (line != null)
065                    {
066    
067                        result.Append(line);
068    
069                        result.Append("\n");
070    
071                        line = reader.ReadLine();
072    
073                    }
074    
075                    // to remove the trailing '\n'
076    
077                    result.Remove(result.ToString().LastIndexOf('\n'), 1);
078    
079                    reader.Close();
080    
081                    response.Close();
082    
083                    return result.ToString().Split('\n');
084    
085                }
086    
087                catch (Exception ex)
088                {
089                    Log.WriteError("Get FileList Error:" + ex.Message);
090                    downloadFiles = null;
091    
092                    return downloadFiles;
093                }
094            }
095    
096            public string[] GetFileList(string path)//上面的代码示例了如何从ftp服务器上获得文件列表
097            {
098                return GetFileList("ftp://" + ftpServerIP + "/" + path, WebRequestMethods.Ftp.ListDirectory);
099            }
100            public string[] GetFileList()//上面的代码示例了如何从ftp服务器上获得文件列表
101            {
102                return GetFileList("ftp://" + ftpServerIP + "/", WebRequestMethods.Ftp.ListDirectory);
103            }
104    
105            public void Upload(string filename) //上面的代码实现了从ftp服务器上载文件的功能
106            {
107                FileInfo fileInf = new FileInfo(filename);
108    
109                string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;
110    
111                Connect(uri);//连接        
112    
113                // 默认为true，连接不会被关闭
114    
115                // 在一个命令之后被执行
116    
117                reqFTP.KeepAlive = false;
118    
119                // 指定执行什么命令
120    
121                reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
122    
123                // 上传文件时通知服务器文件的大小
124    
125                reqFTP.ContentLength = fileInf.Length;
126                // 缓冲大小设置为kb
127                int buffLength = 2048;
128                byte[] buff = new byte[buffLength];
129    
130                int contentLen;
131    
132                // 打开一个文件流(System.IO.FileStream) 去读上传的文件
133    
134                FileStream fs = fileInf.OpenRead();
135    
136                try
137                {
138    
139                    // 把上传的文件写入流
140    
141                    Stream strm = reqFTP.GetRequestStream();
142    
143                    // 每次读文件流的kb
144    
145                    contentLen = fs.Read(buff, 0, buffLength);
146    
147                    // 流内容没有结束
148    
149                    while (contentLen != 0)
150                    {
151                        // 把内容从file stream 写入upload stream
152                        strm.Write(buff, 0, contentLen);
153                        contentLen = fs.Read(buff, 0, buffLength);
154    
155                    }
156    
157                    // 关闭两个流
158    
159                    strm.Close();
160    
161                    fs.Close();
162    
163                }
164    
165                catch (Exception ex)
166                {
167                     Log.WriteError( "Upload Error:" + ex.Message);
168                }
169    
170            }
171    
172            public bool Download(string filePath, string fileName, out string errorinfo)////上面的代码实现了从ftp服务器下载文件的功能
173            {
174                try
175                {
176                    String onlyFileName = Path.GetFileName(fileName);
177    
178                    string newFileName = filePath + "\\" + onlyFileName;
179    
180                    if (File.Exists(newFileName))
181                    {
182    
183                        errorinfo = string.Format("本地文件{0}已存在,无法下载", newFileName);
184                        return false;
185                    }
186                    string url = "ftp://" + ftpServerIP + "/" + fileName;
187                    Connect(url);//连接
188                    reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
189                    FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
190                    Stream ftpStream = response.GetResponseStream();
191                    long cl = response.ContentLength;
192                    int bufferSize = 2048;
193                    int readCount;
194                    byte[] buffer = new byte[bufferSize];
195                    readCount = ftpStream.Read(buffer, 0, bufferSize);
196    
197                    FileStream outputStream = new FileStream(newFileName, FileMode.Create);
198                    while (readCount > 0)
199                    {
200                        outputStream.Write(buffer, 0, readCount);
201                        readCount = ftpStream.Read(buffer, 0, bufferSize);
202                    }
203                    ftpStream.Close();
204                    outputStream.Close();
205                    response.Close();
206    
207                    errorinfo = "";
208    
209                    return true;
210    
211                }
212    
213                catch (Exception ex)
214                {
215                    errorinfo = string.Format("因{0},无法下载", ex.Message);
216    
217                    return false;
218    
219                }
220    
221            }
222    
223            //删除文件
224    
225            public void DeleteFileName(string fileName)
226            {
227                try
228                {
229                    FileInfo fileInf = new FileInfo(fileName);
230    
231                    string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;
232    
233                    Connect(uri);//连接        
234    
235                    // 默认为true，连接不会被关闭
236    
237                    // 在一个命令之后被执行
238    
239                    reqFTP.KeepAlive = false;
240    
241                    // 指定执行什么命令
242    
243                    reqFTP.Method = WebRequestMethods.Ftp.DeleteFile;
244    
245                    FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
246                    response.Close();
247    
248                }
249    
250                catch (Exception ex)
251                {
252                    Log.WriteError("删除错误:" + ex.Message);
253                }
254    
255            }
256    
257            //创建目录
258    
259            public void MakeDir(string dirName)
260            {
261                try
262                {
263                    string uri = "ftp://" + ftpServerIP + "/" + dirName;
264    
265                    Connect(uri);//连接     
266    
267                    reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory;
268    
269                    FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
270    
271                    response.Close();
272    
273                }
274    
275                catch (Exception ex)
276                {
277                    Log.WriteError("创建目录错误:" + ex.Message);
278                }
279    
280            }
281    
282            //删除目录
283    
284            public void delDir(string dirName)
285            {
286                try
287                {
288                    string uri = "ftp://" + ftpServerIP + "/" + dirName;
289    
290                    Connect(uri);//连接     
291    
292                    reqFTP.Method = WebRequestMethods.Ftp.RemoveDirectory;
293    
294                    FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
295    
296                    response.Close();
297    
298                }
299    
300                catch (Exception ex)
301                {
302                    Log.WriteError("删除目录错误:" + ex.Message);
303                }
304    
305            }
306    
307            //获得文件大小
308    
309            public long GetFileSize(string filename)
310            {
311    
312    
313    
314                long fileSize = 0;
315    
316                try
317                {
318    
319                    FileInfo fileInf = new FileInfo(filename);
320    
321                    string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;
322    
323                    Connect(uri);//连接     
324    
325                    reqFTP.Method = WebRequestMethods.Ftp.GetFileSize;
326    
327                    FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
328    
329                    fileSize = response.ContentLength;
330    
331                    response.Close();
332    
333                }
334    
335                catch (Exception ex)
336                {
337                    Log.WriteError("获得文件大小错误:" + ex.Message);
338                }
339    
340                return fileSize;
341    
342            }
343    
344            //文件改名
345    
346            public void Rename(string currentFilename, string newFilename)
347            {
348                try
349                {
350                    FileInfo fileInf = new FileInfo(currentFilename);
351                    string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;
352                    Connect(uri);//连接
353                    reqFTP.Method = WebRequestMethods.Ftp.Rename;
354                    reqFTP.RenameTo = newFilename;
355                    FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
356                    response.Close();
357    
358                }
359    
360                catch (Exception ex)
361                {
362                    Log.WriteError("文件改名错误:" + ex.Message);
363                }
364    
365            }
366            //读取文件
367    
368            public Stream ReadFile(string fileName)
369            {
370                try
371                {
372                    string url = "ftp://" + ftpServerIP + "/" + fileName;
373                    Connect(url);//连接
374                    reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
375                    FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
376                    Stream ftpStream = response.GetResponseStream();
377                    return ftpStream;
378                }
379    
380                catch (Exception ex)
381                {
382                    Log.WriteError("读取文件错误:" + ex.Message);
383                    return null;
384                }
385    
386            }
387    
388            //获得文件明晰
389    
390            public string[] GetFilesDetailList()
391            {
392    
393                return GetFileList("ftp://" + ftpServerIP + "/", WebRequestMethods.Ftp.ListDirectoryDetails);
394    
395            }
396    
397            //获得文件明晰
398    
399            public string[] GetFilesDetailList(string path)
400            {
401    
402                return GetFileList("ftp://" + ftpServerIP + "/" + path, WebRequestMethods.Ftp.ListDirectoryDetails);
403    
404            }
405    
406            // 文件存在检查
407            public bool fileCheckExist(string fileName)
408            {
409                bool success = false;
410                FtpWebResponse response = null;
411                StreamReader reader = null;
412                try
413                {
414                    string url = "ftp://" + ftpServerIP + "/" + fileName;
415                    Connect(url);//连接
416                    reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
417                    response = (FtpWebResponse)reqFTP.GetResponse();
418                    reader = new StreamReader(response.GetResponseStream());
419                    string line = reader.ReadLine();
420                    if (line != null)
421                    {
422                        success = true;
423                    }
424                }
425                catch (Exception)
426                {
427                    success = false;
428                }
429                finally
430                {
431                    if (reader != null)
432                    {
433                        reader.Close();
434                    }
435    
436                    if (response != null)
437                    {
438                        response.Close();
439                    }
440                }
441                return success;
442            }
443        }
444    }