.net 开源 FTP 组件 edtFTPnet

edtFTPnet官方网站：
http://www.enterprisedt.com/products/edtftpnet/

目前最新版本为2.2.3，下载后在bin目录中找到edtFTPnet.dll，在项目中添加引用。
下面为一些用法：

1、FTP服务器根目录为web，在它下面创建如下图示的目录和上传文件
FTPConnection.CommandEncoding = Encoding.GetEncoding("GBK") 指定GBK编码以支持中文文件名
FTPConnection.CreateDirectory() 创建指定目录
FTPConnection.ChangeWorkingDirectory() 切换到指定目录
FTPConnection.UploadFile() 上传文件

web
|-----L11
      |-----L21            
            |-----L31
                  |-----31.htm
            |-----21.htm
      |-----L22
      |-----11.htm
      |-----目录.txt

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private const string ftpServerIP = "xx.xx.xx.xx";

private const string ftpRemotePath = "web";

private const string ftpUserID = "user";

private const string ftpPassword = "123";

 

private void btnCreateAndUpload_Click(object sender, EventArgs e)

{         

    using (var conn = new FTPConnection

    {

        ServerAddress = ftpServerIP,

        ServerDirectory = ftpRemotePath,

        UserName = ftpUserID,

        Password = ftpPassword,

        CommandEncoding = Encoding.GetEncoding("GBK")

    })

    {

        conn.Connect();               

 

        //创建目录L11

        conn.CreateDirectory("L11");

 

        //============切换当前工作目录到L11============

        conn.ChangeWorkingDirectory("L11");

        //上行代码也可以用conn.ServerDirectory = "L11";

 

        //上传"文档.txt"

        conn.UploadFile("文档.txt", "文档.txt");

 

        //创建子目录L21,L22

        conn.CreateDirectory("L21");

        conn.CreateDirectory("L22");

 

        //在当前工作目录L11上传文件"L11.htm"

        conn.UploadFile("11.htm", "11.htm");

 

        //============切换当前工作目录到L21============

        conn.ChangeWorkingDirectory("L21");

 

        //上传文件21.htm

        conn.UploadFile("21.htm", "21.htm");

        //创建目录L31

        conn.CreateDirectory("L31");

 

        //============切换当前工作目录到L31============

        conn.ChangeWorkingDirectory("L31");

 

        //上传文件31.htm

        conn.UploadFile("31.htm", "31.htm");

    }

}

2、获取文件信息
FTPConnection.GetFileInfos() 获取文件和目录详细信息，结果的一个属性Dir为true表示为目录，否则为文件

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private void btnList_Click(object sender, EventArgs e)

{

    using (var conn = new FTPConnection

    {

        ServerAddress = ftpServerIP,

        ServerDirectory = ftpRemotePath,

        UserName = ftpUserID,

        Password = ftpPassword,

        CommandEncoding = Encoding.GetEncoding("GBK")

    })

    {

        conn.Connect();

        //获取指定目录的所有子目录和文件信息

        conn.ChangeWorkingDirectory("L11/L21");              

        var files1 = conn.GetFileInfos();

        ShowFileInfos(files1);

        /*结果如下：

         File, /web/L11/L21/21.htm, 21.htm, 11.2KB, 2013-9-26 14:51:00

         Dir, /web/L11/L21/L31, L31, 0KB, 2013-9-26 14:51:00

         */

 

        ////返回上级目录，例子中为web/L11

        conn.ChangeWorkingDirectoryUp();

        var files2 = conn.GetFileInfosRecursive();

        ShowFileInfos(files2);

        /*结果如下：

        File, /web/L11/11.htm, 11.htm, 59.4KB, 2013-9-26 14:51:00

        Dir, /web/L11/L21, L21, 0KB, 2013-9-26 14:51:00

        Dir, /web/L11/L22, L22, 0KB, 2013-9-26 14:51:00

        File, /web/L11/文档.txt, 文档.txt, 40.8KB, 2013-9-26 14:51:00

        File, /web/L11/L21/21.htm, 21.htm, 11.2KB, 2013-9-26 14:51:00

        Dir, /web/L11/L21/L31, L31, 0KB, 2013-9-26 14:51:00

        File, /web/L11/L21/L31/31.htm, 31.htm, 5.6KB, 2013-9-26 14:51:00

         */

    }

}     

void ShowFileInfos(FTPFile[] files)

{

    foreach (var file in files)

    {

        string info = string.Format("{0}, {1}, {2}, {3}KB, {4}",

            file.Dir ? "Dir" : "File", file.Path, file.Name, Math.Round(file.Size / 1024.0, 1), file.LastModified);

        richTextBox1.AppendText(info + "\r\n");

    }

    richTextBox1.AppendText("\r\n");

}

其中递归获取指定目录的所有子目录和文件信息的扩展方法GetFileInfosRecursive如下：

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public static class FtpClientExtensions

{

    /// <summary>

    /// 递归获取目录的所有子目录和文件信息

    /// </summary>

    public static FTPFile[] GetFileInfosRecursive(this FTPConnection conn)

    {

        var resultList = new List<FTPFile>();

        var fileInfos = conn.GetFileInfos();

        resultList.AddRange(fileInfos);

        foreach (var fileInfo in fileInfos)

        {

            if (fileInfo.Dir)

            {

                conn.ServerDirectory = fileInfo.Path;

                resultList.AddRange(conn.GetFileInfosRecursive());

            }

        }

        return resultList.ToArray();

    }

    /// <summary>

    /// 递归删除目录(包括所有子目录和文件信息)

    /// </summary>

    public static void DeleteDirectoryRecursive(this FTPConnection conn, string directoryName)

    {

        conn.ChangeWorkingDirectory(directoryName);

        var fileInfos = conn.GetFileInfos();

        foreach (var fileInfo in fileInfos)

        {

            if (fileInfo.Dir)

                conn.DeleteDirectoryRecursive(fileInfo.Name);

            else

                conn.DeleteFile(fileInfo.Name);

        }

        conn.ChangeWorkingDirectoryUp();

        conn.DeleteDirectory(directoryName);

    }

}

3、删除目录及所有子目录和文件
FTPConnection.DeleteDirectory()当删除的目录不为空时，会出错，需递归删除，
递归删除目录扩展方法DeleteDirectoryRecursive见上面类FtpClientExtensions

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private void btnDelete_Click(object sender, EventArgs e)

{

    using (var conn = new FTPConnection

    {

        ServerAddress = ftpServerIP,

        ServerDirectory = ftpRemotePath,

        UserName = ftpUserID,

        Password = ftpPassword,

        CommandEncoding = Encoding.GetEncoding("GBK")

    })

    {

        conn.Connect();             

        //递归删除目录及所有子目录和文件

        conn.DeleteDirectoryRecursive("L11");

        //如果删除单个文件，路径为当前目录的相对路径

        //conn.DeleteFile("L11/11.htm");

    }

}