问题

I've translated the code portion as requested:

我已经用C#编写了一个程序，使用WinSCP .NET，它会递归搜索SFTP站点，查找特定子文件夹模式，然后递归枚举这些目录的内容。

程序可以工作，但每个方法的前半部分都相同。会话设置和会话初始化都有很多样板代码。是否可以公开定义一次，然后从每个方法中引用会话？

任何帮助都会很感激。

我尝试将会话传递给类变量或参数，但出现错误。实际上，我不确定我想要的是否可能。

Please note that I've preserved the code structure and syntax while providing the Chinese translation.

<details>
<summary>英文:</summary>

I&#39;ve written a program in C# using WinSCP .NET which recursively searches through an SFTP site looking for a specific subfolder pattern, and then recursively enumerates the contents of those directories.

The program works, but the first half of every method is the same. There&#39;s so much boilerplate with the session settings and session initiation. Is there a way I can just define it once publicly, and then reference the session from each method? 

Any help appreciated.

using WinSCP;

class Sanity
{
public static int Main()
{
try
{
// Setup session options
SessionOptions settings = new SessionOptions
{
Protocol = Protocol.Sftp,
HostName = "",
UserName = "",
Password = "",
SshHostKeyFingerprint = ""
};

        using (Session session = new Session())
        {
            session.Open(settings); // Connect
            
            string homeDir = "/something";

            RemoteDirectoryInfo directory = 
                session.ListDirectory(homeDir);  // Set root location
            
            foreach (RemoteFileInfo file in directory.Files)  // Loop over the directories
            {                                      
                LookDir(file.FullName);     // Pass each parent directory
            }
        }

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

public static void LookDir(string dir) // Searches for the Inbound folder
{
    // Setup session options
    SessionOptions settings = new SessionOptions
    {
        Protocol = Protocol.Sftp,
        HostName = "",
        UserName = "",
        Password = "",
        SshHostKeyFingerprint = ""
    };

    using (Session session = new Session())
    {
        // Connect
        session.Open(settings);

        RemoteDirectoryInfo directory = 
            session.ListDirectory(dir);

        foreach (RemoteFileInfo file in directory.Files)
        {                                      
            if (!file.FullName.Contains(".") && file.IsDirectory) {
                LookDir(file.FullName);  //Recursive

                if (file.FullName.EndsWith("/Inbound")) {
                    
                    Console.WriteLine("Passing " + file.FullName + " for analysis");
                    FileCheck(file.FullName);  // Pass Inbound for enumeration

                }
            } 
        }
    }
}

public static void FileCheck(string Nug) //Recursively checks the Inbound folder for files
{
    SessionOptions settings = new SessionOptions
    {
        Protocol = Protocol.Sftp,
        HostName = "",
        UserName = "",
        Password = "",
        SshHostKeyFingerprint = ""
    };

    using (Session session = new Session())
    {
        // Connect
        session.Open(settings);

        IEnumerable<RemoteFileInfo> fileInfos =
            session.EnumerateRemoteFiles(Nug, "*", WinSCP.EnumerationOptions.AllDirectories);
    
        int count = fileInfos.Count();
    
        if (count > 0) {  

            Console.WriteLine("It contains " + count + " files");
       
        }
    }
}

}

I did attempt to pass the session to a class variable or parameter but I'm getting errors. I'm not actually sure if what I want is possible.


</details>


# 答案1
**得分**: 0

如果您只想打开会话一次，请使用以下方法：

Session _session = null;

private Session GetSession()
{
    if (_session == null)
    {
        var settings = new SessionOptions
        {
            Protocol = Protocol.Sftp,
            HostName = "",
            UserName = "",
            Password = "",
            SshHostKeyFingerprint = ""
        };
 
        var session = new Session();
        session.Open();
        _session = session;
    }
    
    return _session;
}

但您还需要确保在程序结束时处理_session的释放，并确保不要同时多次使用_session。

如果您只想提取`Session`的创建，请参考：
https://stackoverflow.com/q/74727075/850848

Session _session = null;

private Session GetSession()
{
    if (_session == null)
    {
        var settings = new SessionOptions
        {
            Protocol = Protocol.Sftp,
            HostName = "",
            UserName = "",
            Password = "",
            SshHostKeyFingerprint = ""
        };
 
        var session = new Session();
        session.Open();
        _session = session;
    }
    
    return _session;
}