CoreFTP .Net Core学习使用

asp.net core ftp文件操作（CoreFTP）学习使用

关于CoreFTP，CoreFTP是完全由C#编写的FTP库，提供FTP功能
官方文档

Nuget引用

在visual studio中直接搜索CoreFtp

即可安装

简单使用方法
1）创建一个新的类文件CoreFtpOp

//通过构造函数传入配置信息获得ftpClient
_ftpClient = new FtpClient(new FtpClientConfiguration
            {
                Host = host,
                Username = username,
                Password = password,
                Port = 21,
                EncryptionType = FtpEncryption.Implicit,
                IgnoreCertificateErrors = true
            });

在flpClient中提供了方法

        public bool IsAuthenticated { get; }
        public bool IsEncrypted { get; }
        public bool IsConnected { get; }
        public FtpClientConfiguration Configuration { get; }
        public string WorkingDirectory { get; }
        public ILogger Logger { set; }
        public Task ChangeWorkingDirectoryAsync(string directory);
        public Task CloseFileDataStreamAsync(CancellationToken ctsToken = default);
        public void Configure(FtpClientConfiguration configuration);
        public Task CreateDirectoryAsync(string directory);
        public Task DeleteDirectoryAsync(string directory);
        public Task DeleteFileAsync(string fileName);
        public void Dispose();
        public Task<long> GetFileSizeAsync(string fileName);
        public Task<ReadOnlyCollection<FtpNodeInformation>> ListAllAsync();
        public Task<ReadOnlyCollection<FtpNodeInformation>> ListDirectoriesAsync();
        public Task<ReadOnlyCollection<FtpNodeInformation>> ListFilesAsync();
        public Task LoginAsync();
        public Task LogOutAsync();
        public Task<Stream> OpenFileReadStreamAsync(string fileName);
        public Task<Stream> OpenFileWriteStreamAsync(string fileName);
        public Task RenameAsync(string from, string to);
        public Task<FtpResponse> SendCommandAsync(FtpCommandEnvelope envelope, 
CancellationToken token = default);
        public Task<FtpResponse> SendCommandAsync(string command, CancellationToken 
token = default);
        public Task<FtpResponse> SetClientName(string clientName);
        public Task SetTransferMode(FtpTransferMode transferMode, char secondType = 
'\0');

在使用之前我们得先连接到ftp服务器
使用LoginAsync();进行登录。
登录状态可通过IsConnected判断
从本地上传文件到Ftp服务器

public async Task<string> upload(string path, string sourcePath)
        {
            try
            {
                //获取本地文件信息
                var fileinfo = new FileInfo(sourcePath);
                await _ftpClient.LoginAsync();
                //判断连接状态
                if (!_ftpClient.IsConnected)
                {
                    return "could not connect ftp";
                }
                using (var writeStream = await 
                //ftp服务器
                _ftpClient.OpenFileWriteStreamAsync(path))
                {
                    var fileReadStream = fileinfo.OpenRead();
                    //写入
                    await fileReadStream.CopyToAsync(writeStream);
                    return "success";
                }
            }
            catch (Exception e)
            {
                return e.Message;
            }
            finally
            {
                _ftpClient.Dispose();
            }
        }

还有其他得方法

            //获得当前目录
            var currentdir = _ftpClient.WorkingDirectory;
            //改变当前目录
            _ftpClient.ChangeWorkingDirectoryAsync(@"/home");
            //获取目录下所有
            _ftpClient.ListAllAsync();
            //获取目录下目录
            _ftpClient.ListDirectoriesAsync();
            //获取目录下文件
            _ftpClient.ListFilesAsync();
            
            
            
            //等等其他方法

其它方法可在官方文档上查看
继续学习~~~~~