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通常在做服务器与服务器文件、服务器与本地文件同步时通过Ftp服务实现，下面就以服务器文件和本地同步为例，介绍一下Ftp同步文件：
首先建立一个Ftp站点服务,基本身份验证登陆,端口号为默认的21；
Ftp文件同步前端界面如下：
1 #region 获取Ftp服务端文件比较替换 2 /// <summary> 3 /// 比较替换 4 /// </summary> 5 private void btnQuery_Click(object sender, EventArgs e) 6 { 7 msg.AppendText(Environment.NewLine + "开始连接..."); 8 FtpHelp fw = new FtpHelp(service.Text.Trim(), "", lognName.Text.Trim(), Pwd.Text.Trim()); 9 if (fw.ISOK()) 10 { 11 msg.AppendText(Environment.NewLine + "连接成功！\r\n"); 12 Replace(service.Text.Trim(), hostAdress.Text.Trim()); 13 } 14 else 15 { 16 msg.AppendText(Environment.NewLine + "连接失败！\r\n"); 17 } 18 } 19 private bool _isOver = false; 20 private void Replace(string ftpAdress, string hostAdress) 21 { 22 if (!_isOver) 23 { 24 _isOver = true; 25 //链接ftp服务 26 FtpHelp ftphelp = new FtpHelp(service.Text.Trim(), "", lognName.Text.Trim(), Pwd.Text.Trim()); 27 //获取本地文件 28 LogHostFile[] hostFile = GetFile(hostAdress); 29 LogWriter.LogInfo("获取本地文件完成共：" + hostFile.Count()); 30 //获取FTP服务器文件 31 DateTime begin = DateTime.Now; 32 FtpFile[] files = ftphelp.GetFilesList("ftp://" + ftpAdress.Trim(), ""); 33 DateTime end = DateTime.Now; 34 time.Text = "获取服务文件用时：" + (end - begin).Milliseconds.ToString() + "ms;共" + files.Count() + "个文件"; 35 if (files.Count() == 0) 36 { 37 LogWriter.LogInfo("获取服务器文件完成共：" + files.Count() + "可能是服务器连接失败或真的没有文件请管理员查看"); 38 } 39 else 40 { 41 LogWriter.LogInfo("获取服务器文件完成共：" + files.Count()); 42 } 43 Dictionary host = new Dictionary(); 44 Dictionary ftp = new Dictionary(); 45 if (hostAdress == "") 46 { 47 LogWriter.LogError("本地路径为空"); 48 } 49 else 50 { 51 try 52 { 53 //遍历Ftp服务器端的文件 54 ftp.Clear(); 55 foreach (FtpFile ftpfile in files) 56 { 57 if (!ftp.ContainsKey(ftpfile.FileFullName)) 58 { 59 ftp.Add(ftpfile.FileFullName, ftpfile.FileSize); 60 } 61 } 62 //遍历本地服务器端的文件 63 host.Clear(); 64 foreach (LogHostFile ftpfile in hostFile) 65 { 66 if (!host.ContainsKey(ftpfile.FileFullName)) 67 { 68 host.Add(ftpfile.FileFullName, ftpfile.FileSize); 69 } 70 } 71 } 72 catch (Exception ex) 73 { 74 LogWriter.LogError("将本地和服务文件放入Dictionary集合中出错：" + ex.Message); 75 } 76 finally 77 { 78 _isOver = false; 79 } 80 LogWriter.LogInfo("开始循环服务器中的文件比较替换"); 81 bool IsRelpace = false; 82 foreach (KeyValuePair ftpfile in ftp) 83 { 84 #region 判断服务器端的文件是否在本地存在 85 //判断服务器端的文件是否在本地存在 86 if (host.Count != 0)//如果本地没有文件 87 { 88 #region 是否有这个文件 89 if (host.ContainsKey(ftpfile.Key)) 90 { 91 #region 如果存在判断两个文件的大小是否相等 92 //如果存在判断两个文件的大小是否相等 93 if (host[ftpfile.Key] != ftpfile.Value) 94 { 95 IsRelpace = true; 96 LogWriter.LogInfo(ftpfile.Key + " 文件在本地的大小：" + host[ftpfile.Key] + ";在服务器的大小：" + ftpfile.Value); 97 //不相等就等换 98 try 99 { 100 if (ftphelp.Download(hostAdress, ftpfile.Key.Trim())) 101 { 102 msg.AppendText(Environment.NewLine + "开始替换" + "ftp://" + ftpAdress.Trim() + "/" + ftpfile.Key + "\r\n"); 103 msg.AppendText(Environment.NewLine + "替换中..." + "\r\n"); 104 msg.AppendText(Environment.NewLine + "替换成功！" + "\r\n"); 105 LogWriter.LogInfo("替换文件：" + ftpfile.Key.Trim() + "本地文件大小：" + host[ftpfile.Key] + "; FTP文件大小：" + ftpfile.Value); 106 } 107 else 108 { 109 msg.AppendText(Environment.NewLine + "替换失败！" + "\r\n"); 110 LogWriter.LogError("替换文件：" + ftpfile.Key.Trim() + "失败"); 111 } 112 } 113 catch (Exception ex) 114 { 115 LogWriter.LogError("文件" + ftpfile.Key + "比较替换时失败：" + ex.Message); 116 } 117 finally 118 { 119 _isOver = false; 120 } 121 } 122 #endregion 123 } 124 else 125 { 126 IsRelpace = true; 127 try 128 { 129 if (ftphelp.Download(hostAdress, ftpfile.Key.Trim())) 130 { 131 msg.AppendText(Environment.NewLine + "本地没有的文件开始下载" + "ftp://" + ftpAdress.Trim() + "/" + ftpfile.Key); 132 msg.AppendText(Environment.NewLine + "下载中..."); 133 msg.AppendText(Environment.NewLine + "下载成功！"); 134 LogWriter.LogInfo("下载服务器文件" + ftpfile.Key.Trim()); 135 } 136 else 137 { 138 msg.AppendText(Environment.NewLine + "下载新文件失败！"); 139 LogWriter.LogError("下载服务器文件" + ftpfile.Key.Trim() + "失败"); 140 } 141 } 142 catch (Exception ex) 143 { 144 LogWriter.LogError("文件" + ftpfile.Key + "下载时失败：" + ex.Message); 145 } 146 finally 147 { 148 _isOver = false; 149 } 150 } 151 #endregion 152 } 153 else 154 { 155 IsRelpace = true; 156 try 157 { 158 if (ftphelp.Download(hostAdress, ftpfile.Key.Trim())) 159 { 160 msg.AppendText(Environment.NewLine + "本地没有的文件开始下载" + "ftp://" + ftpAdress.Trim() + "/" + ftpfile.Key); 161 msg.AppendText(Environment.NewLine + "下载中..."); 162 msg.AppendText(Environment.NewLine + "下载成功！"); 163 LogWriter.LogInfo("下载服务器文件" + ftpfile.Key.Trim()); 164 } 165 else 166 { 167 msg.AppendText(Environment.NewLine + "下载新文件失败！"); 168 LogWriter.LogError("下载服务器文件" + ftpfile.Key.Trim() + "失败"); 169 } 170 } 171 catch (Exception ex) 172 { 173 LogWriter.LogError("文件" + ftpfile.Key + "下载时失败：" + ex.Message); 174 } 175 finally 176 { 177 _isOver = false; 178 } 179 } 180 #endregion 181 } 182 if (IsRelpace) 183 { 184 LogWriter.LogInfo("替换工作完成！！"); 185 } 186 else 187 { 188 LogWriter.LogInfo("FTP和本地的文件没有不同不需要替换"); 189 } 190 } 191 } 192 else 193 { 194 LogWriter.LogInfo("上一次替换未执行完成不进行下一次的操作！"); 195 } 196 } 197 #endregion 198 #region 获取本地文件 199 public LogHostFile[] GetFile(string str) 200 { 201 List hostFile = new List(); 202 if (str != "") 203 { 204 string filepath = hostAdress.Text.Trim(); 205 DirectoryInfo theFolder = new DirectoryInfo(str); 206 //LogWriter.LogInfo(str); 207 FileSystemInfo[] fileinfo = theFolder.GetFileSystemInfos(); 208 foreach (FileSystemInfo NextFolder in fileinfo) 209 { 210 if (this.GetFileType(NextFolder.FullName) == 0)//wenjian 211 { 212 FileInfo Next = (FileInfo)NextFolder; 213 long size = Next.Length; 214 //获取文件的名称 215 hostFile.Add(new LogHostFile() { FileSize = size, FileFullName = NextFolder.FullName.Replace("\\", "/").Remove(0, filepath.Length).Substring(1) }); 216 LogWriter.LogInfo(NextFolder.FullName); 217 } 218 else if (this.GetFileType(NextFolder.FullName) == 1)//wenjianjia 219 { 220 LogHostFile[] hostfile = GetFile(NextFolder.FullName); 221 foreach (LogHostFile file in hostfile) 222 { 223 hostFile.Add(file); 224 } 225 } 226 } 227 } 228 else 229 { 230 LogWriter.LogError("没有给本地文件路径！"); 231 } 232 return hostFile.ToArray(); 233 } 234 #endregion 235 /// <summary> 236 /// 判断是文件还是文件夹 237 /// </summary> 238 public int GetFileType(string path) 239 { 240 if (File.Exists(path)) 241 { 242 return 0; 243 // 是文件 244 } 245 else if (Directory.Exists(path)) 246 { 247 return 1; 248 // 是文件夹 249 } 250 else 251 { 252 return 2; 253 // 都不是 254 } 255 }
1 public class FtpHelp 2 { 3 string ftpServerIP; 4 string ftpRemotePath; 5 string ftpUserName; 6 string ftpPassword; 7 string ftpURI; 8 #region 连接FTP 9 /// <summary> 10 /// 连接FTP 11 /// </summary> 12 /// FTP连接地址 13 /// 指定FTP连接成功后的当前目录, 如果不指定即默认为根目录 14 /// 用户名 15 /// 密码 16 public FtpHelp(string FtpServerIP, string FtpRemotePath, string FtpUserName, string FtpPassword) 17 { 18 ftpServerIP = FtpServerIP; 19 ftpRemotePath = FtpRemotePath; 20 ftpUserName = FtpUserName; 21 ftpPassword = FtpPassword; 22 ftpURI = "ftp://" + ftpServerIP + "/"; 23 } 24 /// <summary> 25 /// 是否连接成功 26 /// </summary> 27 public bool ISOK() 28 { 29 try 30 { 31 FtpWebRequest reqFTP; 32 reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI)); 33 reqFTP.Credentials = new NetworkCredential(ftpUserName, ftpPassword); 34 return true; 35 }catch(Exception e) 36 { 37 return false; 38 } 39 } 40 #endregion 41 #region 下载 42 /// <summary> 43 /// 下载 44 /// </summary> 45 public bool Download(string filePath, string fileName) 46 { 47 FtpWebRequest reqFTP; 48 try 49 { 50 string newpath=""; 51 if (fileName.Contains("/")) 52 { 53 newpath=fileName.Substring(0,fileName.LastIndexOf(@"/")); 54 newpath = newpath.Replace("/", "\\"); 55 } 56 string path = filePath+"\\" + newpath; 57 DirectoryInfo di = new DirectoryInfo(path); 58 if (!di.Exists) 59 { 60 di.Create(); 61 } 62 FileStream outputStream = new FileStream(filePath + "\\" + fileName, FileMode.Create); 63 reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + fileName)); 64 reqFTP.Method = WebRequestMethods.Ftp.DownloadFile; 65 reqFTP.UseBinary = true; 66 reqFTP.Credentials = new NetworkCredential(ftpUserName, ftpPassword); 67 FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse(); 68 Stream ftpStream = response.GetResponseStream(); 69 long cl = response.ContentLength; 70 int bufferSize = 2048; 71 int readCount; 72 byte[] buffer = new byte[bufferSize]; 73 readCount = ftpStream.Read(buffer, 0, bufferSize); 74 while (readCount > 0) 75 { 76 outputStream.Write(buffer, 0, readCount); 77 readCount = ftpStream.Read(buffer, 0, bufferSize); 78 } 79 ftpStream.Close(); 80 outputStream.Close(); 81 response.Close(); 82 return true; 83 } 84 catch (Exception ex) 85 { 86 LogWriter.LogError("文件" + fileName + "下载失败：" + ex.Message); 87 // Insert_Standard_ErrorLog.Insert("FtpWeb", "Download Error --> " + ex.Message); 88 return false; 89 } 90 } 91 #endregion 92 #region 获取当前目录下明细(包含文件和文件夹) 93 string name = ""; 94 public FtpFile[] GetFilesList(string ftpURI,string name) 95 { 96 List result = new List(); 97 try 98 { 99 FtpWebRequest ftp; 100 Uri uri = new Uri(ftpURI); 101 LogWriter.LogInfo(uri.Host); 102 LogWriter.LogInfo(uri.HostNameType.ToString()); 103 LogWriter.LogInfo(uri.IsFile.ToString()); 104 LogWriter.LogInfo(uri.LocalPath); 105 ftp = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI)); 106 ftp.Credentials = new NetworkCredential(ftpUserName, ftpPassword); 107 ftp.Method = WebRequestMethods.Ftp.ListDirectoryDetails; 108 ftp.Timeout = 10000; 109 string aa = ""; 110 using (WebResponse response = ftp.GetResponse()) 111 { 112 using (StreamReader reader = new StreamReader(response.GetResponseStream(), System.Text.ASCIIEncoding.UTF8)) 113 { 114 aa = reader.ReadToEnd(); 115 reader.Close(); 116 response.Close(); 117 } 118 } 119 string[] ftpFileList = aa.Split(new string[] { "\r\n" }, StringSplitOptions.RemoveEmptyEntries); 120 foreach(string line in ftpFileList) 121 { 122 if (line.Contains("")) 123 { 124 string dirName = GetFileName(line); 125 string newUrl = ftpURI + @"/" + dirName; 126 string newName = name + @"/" + dirName; 127 FtpFile[] files = GetFilesList(newUrl, newName); 128 foreach (FtpFile file in files) 129 { 130 result.Add(file); 131 } 132 } 133 else 134 { 135 string fileName = GetFileName(line); 136 string[] ftpFile = line.Split(new char[] { ‘ ‘ }, StringSplitOptions.RemoveEmptyEntries); 137 //获取文件的大小 和全路径 138 result.Add(new FtpFile() { FileSize = int.Parse(ftpFile[2]), FileFullName = (name + @"/" + fileName).Substring(1) }); 139 } 140 } 141 } 142 catch (Exception ex) 143 { 144 string message = ex.Message; 145 // Insert_Standard_ErrorLog.Insert("FtpWeb", "GetFilesDetailList Error --> " + ex.Message); 146 LogWriter.LogError(ex.Message); 147 } 148 return result.ToArray(); 149 } 150 private string GetFileName(string line) 151 { 152 string newStr = line.Substring(line.IndexOf(" ")); 153 newStr = newStr.TrimStart(); 154 newStr = newStr.Substring(newStr.IndexOf(" ")); 155 newStr = newStr.TrimStart(); 156 newStr = newStr.Substring(newStr.IndexOf(" ")); 157 return newStr.Trim(); 158 } 159 /// <summary> 160 /// 获取当前目录下明细(包含文件和文件夹) 161 /// </summary> 162 public string[] GetFilesDetailList() 163 { 164 string[] downloadFiles; 165 try 166 { 167 StringBuilder result = new StringBuilder(); 168 FtpWebRequest ftp; 169 ftp = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI)); 170 ftp.Credentials = new NetworkCredential(ftpUserName, ftpPassword); 171 ftp.Method = WebRequestMethods.Ftp.ListDirectoryDetails; 172 WebResponse response = ftp.GetResponse(); 173 StreamReader reader = new StreamReader(response.GetResponseStream()); 174 //string aa = reader.ReadToEnd(); 175 string line = reader.ReadLine(); 176 while (line != null) 177 { 178 result.Append(line); 179 result.Append("\n"); 180 line = reader.ReadLine(); 181 } 182 result.Remove(result.ToString().LastIndexOf("\n"), 1); 183 reader.Close(); 184 response.Close(); 185 return result.ToString().Split(‘\n‘); 186 } 187 catch (Exception ex) 188 { 189 downloadFiles = null; 190 string message = ex.Message; 191 // Insert_Standard_ErrorLog.Insert("FtpWeb", "GetFilesDetailList Error --> " + ex.Message); 192 return downloadFiles; 193 } 194 } 195 #endregion 196 }
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原文地址：http://www.cnblogs.com/huhangfei/p/4989176.html
