Question

我已经在这几天工作了，似乎无法弄清楚为什么我无法从我的服务器下载目录中的每个文件。在我收到拒绝访问错误后，我成功地能够下载第一个文件。

以下是我用来连接服务器并开始下载过程的代码。

    public void downloadPaperwork()
    {
        // Setup Credentials and Server Information
        ConnectionInfo ConnNfo = new ConnectionInfo(ipAddress, port, serverName,
            new AuthenticationMethod[]{
            // Key Based Authentication (using keys in OpenSSH Format)
            new PrivateKeyAuthenticationMethod(serverName,new PrivateKeyFile[]{
                new PrivateKeyFile(keyFile,password)
            }),
            });

        using (var sftp = new SftpClient(ConnNfo))
        {
            sftp.Connect();

            sftp.ChangeDirectory("/var/www/html/invoices");

            List<SftpFile> invoices = sftp.ListDirectory(".").ToList();

            foreach (var file in invoices)
            {
                string filename = Path.Combine(Application.StartupPath + folder, file.Name);

                using (var fs = new FileStream(filename, FileMode.Create))
                {
                    if(!file.Name.Equals(".") && !file.Name.Equals(".."))
                    {
                        MessageBox.Show(file.Name);
                        sftp.DownloadFile(file.FullName, fs);
                        fs.Close();
                    }

                }
            }
            sftp.Disconnect();
        }
    }

以下是我在运行时重现的整个异常：

System.UnauthorizedAccessException: Access to the path 'C:\Users\*****\Documents\Visual Studio 2015\Projects\********\**********\bin\Debug\****\Invoices' is denied.
   at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
   at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost)
   at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, String msgPath, Boolean bFromProxy)
   at System.IO.FileStream..ctor(String path, FileMode mode)
   at *********.Form1.downloadPaperwork() in C:\Users\******\Documents\Visual Studio 2015\Projects\*********\*********\Secretary Form.cs:line 173
   at ********.Form1.Form1_Load(Object sender, EventArgs e) in C:\Users\*****\Documents\Visual Studio 2015\Projects\*******\*******\Secretary Form.cs:line 120
   at System.Windows.Forms.Form.OnLoad(EventArgs e)
   at System.Windows.Forms.Form.OnCreateControl()
   at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
   at System.Windows.Forms.Control.CreateControl()
   at System.Windows.Forms.Control.WmShowWindow(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   at System.Windows.Forms.Form.WmShowWindow(Message& m)
   at System.Windows.Forms.Form.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

我已尝试在文件流中添加文件而我没有收到错误，但它一直在替换一个文件，只留下目录中的最后一个文件。

非常感谢任何帮助。提前谢谢。

Answer 1

错误是因为除了文件之外还要提取目录。我只是将您的代码包装在catch块和UnauthorizedAccessException continue例外中，并在catch块中放置{{1}}。

使用Renci.SshNet从服务器目录下载每个文件

1 个答案: