c# - 如何使用 FtpWebRequest 递归删除包含文件的文件夹？

Question

我想递归地删除 FTP 中的文件夹及其文件。

我可以实现任何示例代码吗？

Answer 1

首先你必须列出目录中的所有文件:

public static List<string> DirectoryListing(string Path, string ServerAdress, string Login, string Password)
    {
        FtpWebRequest request = (FtpWebRequest)WebRequest.Create("ftp://" + ServerAdress + Path);
        request.Credentials = new NetworkCredential(Login, Password);

        request.Method = WebRequestMethods.Ftp.ListDirectory;            

        FtpWebResponse response = (FtpWebResponse)request.GetResponse();
        Stream responseStream = response.GetResponseStream();
        StreamReader reader = new StreamReader(responseStream);

        List<string> result = new List<string>();

        while (!reader.EndOfStream)
        {
            result.Add(reader.ReadLine());
        }

        reader.Close();
        response.Close();

        return result;
    }

那么你需要一个删除单个文件的方法(因为只有当文件夹为空时你才能删除它):

public static void DeleteFTPFile(string Path, string ServerAdress, string Login, string Password)
    {
        FtpWebRequest clsRequest = (System.Net.FtpWebRequest)WebRequest.Create("ftp://" + ServerAdress + Path);
        clsRequest.Credentials = new System.Net.NetworkCredential(Login, Password);

        clsRequest.Method = WebRequestMethods.Ftp.DeleteFile;

        string result = string.Empty;
        FtpWebResponse response = (FtpWebResponse)clsRequest.GetResponse();
        long size = response.ContentLength;
        Stream datastream = response.GetResponseStream();
        StreamReader sr = new StreamReader(datastream);
        result = sr.ReadToEnd();
        sr.Close();
        datastream.Close();
        response.Close();
    }

最后:

public static void DeleteFTPDirectory(string Path, string ServerAdress, string Login, string Password)
{
        FtpWebRequest clsRequest = (System.Net.FtpWebRequest)WebRequest.Create("ftp://" + ServerAdress + Path);
        clsRequest.Credentials = new System.Net.NetworkCredential(Login, Password);

        List<string> filesList = DirectoryListing(Path, ServerAdress, Login, Password);

        foreach (string file in filesList)
        {
            DeleteFTPFile(Path + file, ServerAdress, Login, Password);
        }

        clsRequest.Method = WebRequestMethods.Ftp.RemoveDirectory;

        string result = string.Empty;
        FtpWebResponse response = (FtpWebResponse)clsRequest.GetResponse();
        long size = response.ContentLength;
        Stream datastream = response.GetResponseStream();
        StreamReader sr = new StreamReader(datastream);
        result = sr.ReadToEnd();
        sr.Close();
        datastream.Close();
        response.Close();
    } 

你可以很容易地这样调用它(对我来说，这些方法在一个名为“Ftp”的类中):

Ftp.DeleteFTPDirectory(the_path_of_your_folder_in_ftp,your_server_address,your_ftp_login,your_ftp_password);

当然，您需要自定义这些行，但它对我来说非常有效:)