使用之前，请记得nuget using XiaoFeng.Ftp包

使用代码如下：

var ftClient= new FtpClient(new FtpClientConfig() { Host="192.168.1.66", Port=21, UserName="admin",Password="111111" });
//切换ftp服务器的目录
var lll= await ftClient.ChangeDirectoryAsync("img");
//本地文件上传到ftp
var ll= await ftClient.NewPutByGuid("C:\\Users\\user\\Desktop\\photo\\", "2.jpg");
//从ftp下载文件到本地
var l1l = ftClient.DownFileAsync("\\img\\1.png", "C:\\Users\\user\\Desktop\\photo\\","test.jpg");

如果想使用接口依赖注入的方式，则这样使用：

using XiaoFeng.Ftp;
using XiaoFeng.IO;

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddScoped<IFtpClient>((serviceProvider)
    => new FtpClient(new FtpClientConfig() { Host = "192.168.1.66", Port = 21, UserName = "admin", Password = "111111" }));

然后在你的服务内使用构造函数进行注入：

        /// <summary>
        /// 
        /// </summary>
        public readonly IFtpClient _ftpClient;
        /// <summary>
        /// 
        /// </summary>
        /// <param name="ftpClient"></param>
        public ManageController(IFtpClient ftpClient)
        {
            _ftpClient = ftpClient;
        }
        /// <summary>
        /// 测试ftp
        /// </summary>
        /// <returns></returns>
        [HttpGet]
        public async Task<bool> PushTemperatureAlarm()
        {

            var klkl = await _ftpClient.DownFileAsync("\\img\\1.png", "C:\\Users\\user\\Desktop\\photo\\", "11111.jpg");

            await Task.CompletedTask;
            return true;
        }

上面是使用的大致demo
下面我们列举，连接配置字段：

/// <summary>
        /// 帐号
        /// </summary>
        [Description("帐号")]
        public string UserName { get; set; }
        /// <summary>
        /// 密码
        /// </summary>
        [Description("密码")]
        public string Password { get; set; }
        /// <summary>
        /// 主机
        /// </summary>
        [Description("主机")]
        public string Host { get; set; }
        /// <summary>
        /// 端口
        /// </summary>
        [Description("端口")]
        public int Port { get; set; } = 21;
        /// <summary>
        /// 连接超时
        /// </summary>
        [Description("连接超时时长,单位是毫秒")]
        public int Timeout { get; set; } = 100_000;
        /// <summary>
        /// 读写超时时长,单位是毫秒
        /// </summary>
        [Description("读写超时时长,单位是毫秒")]
        public int ReadWriteTimeout { get; set; } = 300_000;
        /// <summary>
        /// 断开超时时长
        /// </summary>
        [Description("断开超时时长,单位是毫秒")]
        public int DisconnectTimeout { get; set; } = 300_000;
        /// <summary>
        /// 接收超时时长
        /// </summary>
        [Description("接收超时时长,单位是毫秒")]
        public int ReceiveTimeout { get; set; } = 300;
        /// <summary>
        /// 发送超时时长
        /// </summary>
        [Description("发送超时时长,单位是毫秒")]
        public int SendTimeout { get; set; } = 300;
        /// <summary>
        /// 重试连接次数
        /// </summary>
        [Description("重试连接次数")] 
        public int ConnectCount { get; set; }
        /// <summary>
        /// 本地目录
        /// </summary>
        [Description("本地目录")]
        public string LocalDirectory { get; set; }
        /// <summary>
        /// 服务器目录
        /// </summary>
        public string RemoteDirectory { get; set; } = "/";
        /// <summary>
        /// 编码名称
        /// </summary>
        [Description("编码名称")] 
        public string CharsetName { get; set; }
        /// <summary>
        /// 代理地址
        /// </summary>
        [Description("代理地址")] 
        public string ProxyHost { get; set; }
        /// <summary>
        /// 代理端口
        /// </summary>
        [Description("代理端口")] 
        public int ProxyPort { get; set; }
        /// <summary>
        /// 代理帐号
        /// </summary>
        [Description("代理帐号")] 
        public string ProxyUserName { get; set; }
        /// <summary>
        /// 代理密码
        /// </summary>
        [Description("代理密码")]
        public string ProxyPassword { get; set; }
        /// <summary>
        /// 是否使用SSL链接
        /// </summary>
        [Description("是否使用SSL链接")]
        public Boolean EnableSSL { get; set; } = false;
        /// <summary>
        /// 是否允许二进制
        /// </summary>
        [Description("是否允许二进制")]
        public Boolean UseBinary { get; set; } = true;
        /// <summary>
        /// 是否允许被动式
        /// </summary>
        [Description("是否允许被动式")]
        public Boolean UsePassive { get; set; } = true;
        /// <summary>
        /// 是否请求完成关闭链接
        /// </summary>
        [Description("是否请求完成保持链接")]
        public Boolean KeepAlive { get; set; } = true;