識別新同步文件（WinSCP）

Question

我目前正在解析應用程序，它首先從遠程服務器獲取.csv文件，然後將其同步到本地服務器。同步後，從本地路徑下載的文件將被解析，然後插入到SQL數據庫中。如果從遠程服務器添加了新文件（然後將其同步到本地服務器），那麼應用程序將如何知道如何解析這些特定的新文件（防止重新解析並重新插入舊的.csv文件已解析）？

我迄今爲止代碼：

public static int Main() 
{ 
    try 
    { 
     // Setup session options 
     SessionOptions sessionOptions = new SessionOptions 
     { 
      Protocol = Protocol.Scp, 
      HostName = hostName, 
      UserName = userName, 
      Password = passWord, 
      SshHostKeyFingerprint = sshHostKey 
     }; 

     using (Session session = new Session()) 
     { 
      // Will continuously report progress of synchronization 
      session.FileTransferred += FileTransferred; 

      // Connect 
      session.Open(sessionOptions); 

      // Synchronize files 
      SynchronizationResult synchronizationResult; 
      synchronizationResult = 
       session.SynchronizeDirectories(
        SynchronizationMode.Local, localPath, remotePath, false); 

      // Throw on any error 
      synchronizationResult.Check(); 

      Run(); 
     } 
     return 0; 
    } 
    catch (Exception e) 
    { 
     Console.WriteLine("Error: {0}", e); 
     Console.ReadLine(); 
     return 1; 
    } 
} 

同步文件時，此處理該事件：

private static void FileTransferred(object sender, TransferEventArgs e) 
{ 
    if (e.Error == null) 
    { 
     Console.WriteLine("Upload of {0} from remote to local server succeeded", e.FileName); 
    } 
    else 
    { 
     Console.WriteLine("Upload of {0} from remote to local server failed: {1}", e.FileName, e.Error); 
    } 

    if (e.Chmod != null) 
    { 
     if (e.Chmod.Error == null) 
     { 
      Console.WriteLine("Permisions of {0} set to {1}", e.Chmod.FileName, e.Chmod.FilePermissions); 
     } 
     else 
     { 
      Console.WriteLine("Setting permissions of {0} failed: {1}", e.Chmod.FileName, e.Chmod.Error); 
     } 
    } 
    else 
    { 
     Console.WriteLine("Permissions of {0} kept with their defaults", e.Destination); 
    } 

    if (e.Touch != null) 
    { 
     if (e.Touch.Error == null) 
     { 
      Console.WriteLine("Timestamp of {0} set to {1}", e.Touch.FileName, e.Touch.LastWriteTime); 
     } 
     else 
     { 
      Console.WriteLine("Setting timestamp of {0} failed: {1}", e.Touch.FileName, e.Touch.Error); 
     } 
    } 
    else 
    { 
     // This should never happen during "local to remote" synchronization 
     Console.WriteLine("Timestamp of {0} kept with its default (current time)", e.Destination); 
    } 
} 

這解析的.csv文件的內容。同步後發生。

public static void Run() 
{ 
    dataTable(); 

    List<string> items = new List<string>(); 

    foreach (string file in Directory.EnumerateFiles(localPath, "*.csv")) 
    { 
     if (file.Contains("test")) 
     { } 
     else 
     { 
      using (FileStream fs = new FileStream(file, FileMode.Open, FileAccess.Read, FileShare.ReadWrite)) 
      { 
       using (StreamReader sr = new StreamReader(fs)) 
       { 
        while (!sr.EndOfStream) 
         items.Add(sr.ReadLine()); 

        foreach (string item in items) 
        { 
         var row = dt.NewRow(); 
         string[] columnValues = item.Split(','); 
         int column = 3; 

         for (int a = 0; a < columnValues.Length; a++) 
         { 
          string date = columnValues[29] + " " + columnValues[28]; 
          row[col[1].ColumnName] = DateTime.Parse(date); 
          string test = file.Split(new[] { splitVal }, StringSplitOptions.None)[1]; 
          row[col[2].ColumnName] = test.Split('.')[0]; 

          if (a >= 54) 
          { } 
          else 
          { 
           if (string.IsNullOrEmpty(columnValues[a])) 
           { 
            row[col[column].ColumnName] = DBNull.Value; 
           } 
           else 
           { 
            try 
            { 
             try 
             { 
              row[col[column].ColumnName] = columnValues[a].Trim(); 
             } 
             catch 
             { 
              try 
              { 
               row[col[column].ColumnName] = Convert.ToDouble(columnValues[a].Trim()); 
              } 
              catch 
              { 
               row[col[column].ColumnName] = int.Parse(columnValues[a].Trim()); 
              } 
             } 
            } 
            catch (Exception ex) 
            { 
             Console.WriteLine("Error [" + col[column].ColumnName + "]:" + ex.ToString()); 
             //row[col[column].ColumnName] = DBNull.Value; 
            } 
           } 
          } 

          column++; 
         } 
         dt.Rows.Add(row); 
        } 

        using (SqlConnection con = new SqlConnection(consstring)) 
        { 
         using (SqlBulkCopy sqlBulkCopy = new SqlBulkCopy(con)) 
         { 
          //Set the database table name 
          sqlBulkCopy.DestinationTableName = dbTable; 
          con.Open(); 
          try 
          { 
           sqlBulkCopy.WriteToServer(dt); 
           Console.WriteLine(file.Substring(file.LastIndexOf('\\') + 1) + " uploaded in the database\n"); 
          } 
          catch (Exception ex) 
          { 
           Console.WriteLine(file.Substring(file.LastIndexOf('\\') + 1) + " cannot be uploaded to database. " + ex.ToString()); 
          } 
          con.Close(); 
         } 
        } 
        sr.Dispose(); 
        sr.Close(); 
       } 

       fs.Dispose(); 
       fs.Close(); 
      } 
     } 
    } 
} 

以上代碼基於WinSCP的Session.SynchronizeDirectories Method。

Answer 1

所以不要列舉所有*.csv文件。僅列舉同步/下載的那些：

foreach (TransferEventArgs transfer in synchronizationResult.Downloads) 
{ 
    string file = transfer.Destination; 
    ... 
} 

查看SynchronizationResult class。