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    }