我想删除FTP中的文件夹。
可以FTPClient对象删除吗？
FtpWebRequest提供Delete操作。这是一段代码来实现：
FtpWebRequest reqFTP = FtpWebRequest.Create(uri);
// Credentials and login handling...
reqFTP.Method = WebRequestMethods.Ftp.DeleteFile;
string result = string.Empty;
FtpWebResponse response = reqFTP.GetResponse();
long size = response.ContentLength;
Stream datastream = response.GetResponseStream();
StreamReader sr = new StreamReader(datastream);
result = sr.ReadToEnd();
sr.Close();
datastream.Close();
response.Close();
它应该适用于文件和目录。确实，请检查您是否拥有正确的权限。
此外，如果文件夹不为空，则无法删除它们。您必须递归遍历它们才能删除内容。
由于权限问题引发的异常并不总是很清楚......
要删除空目录，请使用RemoveDirectory的FtpWebRequest“方法”：
void DeleteFtpDirectory(string url, NetworkCredential credentials)
{
FtpWebRequest request = (FtpWebRequest)WebRequest.Create(url);
request.Method = WebRequestMethods.Ftp.RemoveDirectory;
request.Credentials = credentials;
request.GetResponse().Close();
}
使用它像：
string url = "ftp://ftp.example.com/directory/todelete";
NetworkCredential credentials = new NetworkCredential("username", "password");
DeleteFtpDirectory(url, credentials);
虽然它变得更复杂，但是如果你需要删除一个非空的目录。在FtpWebRequest类（或.NET框架中的任何其他FTP实现）中不支持递归操作。你必须自己实现递归：
棘手的部分是识别子目录中的文件。用FtpWebRequest以便携方式无法做到这一点。遗憾的是，FtpWebRequest不支持MLSD命令，这是在FTP协议中使用文件属性检索目录列表的唯一可移植方式。另见Checking if object on FTP server is file or directory。
你的选择是：
LIST命令= ListDirectoryDetails方法）并尝试解析特定于服务器的列表。许多FTP服务器使用* nix样式列表，您可以在条目的最开头通过d识别目录。但是许多服务器使用不同的格式。以下示例使用此方法（假设为* nix格式）。static void DeleteFtpDirectory(string url, NetworkCredential credentials)
{
FtpWebRequest listRequest = (FtpWebRequest)WebRequest.Create(url);
listRequest.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
listRequest.Credentials = credentials;
List<string> lines = new List<string>();
using (FtpWebResponse listResponse = (FtpWebResponse)listRequest.GetResponse())
using (Stream listStream = listResponse.GetResponseStream())
using (StreamReader listReader = new StreamReader(listStream))
{
while (!listReader.EndOfStream)
{
lines.Add(listReader.ReadLine());
}
}
foreach (string line in lines)
{
string[] tokens =
line.Split(new[] { ' ' }, 9, StringSplitOptions.RemoveEmptyEntries);
string name = tokens[8];
string permissions = tokens[0];
string fileUrl = url + name;
if (permissions[0] == 'd')
{
DeleteFtpDirectory(fileUrl + "/", credentials);
}
else
{
FtpWebRequest deleteRequest = (FtpWebRequest)WebRequest.Create(fileUrl);
deleteRequest.Method = WebRequestMethods.Ftp.DeleteFile;
deleteRequest.Credentials = credentials;
deleteRequest.GetResponse();
}
}
FtpWebRequest removeRequest = (FtpWebRequest)WebRequest.Create(url);
removeRequest.Method = WebRequestMethods.Ftp.RemoveDirectory;
removeRequest.Credentials = credentials;
removeRequest.GetResponse();
}
使用方法与上一个（平面）实现方式相同。
或者使用支持递归操作的第三方库。
例如，使用WinSCP .NET assembly，只需调用Session.RemoveFiles即可删除整个目录：
// Setup session options
SessionOptions sessionOptions = new SessionOptions
{
Protocol = Protocol.Ftp,
HostName = "example.com",
UserName = "user",
Password = "mypassword",
};
using (Session session = new Session())
{
// Connect
session.Open(sessionOptions);
// Delete folder
session.RemoveFiles("/directory/todelete").Check();
}
在内部，如果服务器支持，WinSCP使用MLSD命令。如果没有，它使用LIST命令并支持许多不同的列表格式。
（我是WinSCP的作者）
我发现工作的唯一方法是依赖“WebRequestMethods.Ftp.DeleteFile”并且它会给文件夹或文件夹带有文件的异常，所以我创建了一个新的interenal方法，以递归方式删除目录这里是代码
public void delete(string deleteFile)
{
try
{
/* Create an FTP Request */
ftpRequest = (FtpWebRequest)WebRequest.Create(host + "/" + deleteFile);
/* Log in to the FTP Server with the User Name and Password Provided */
ftpRequest.Credentials = new NetworkCredential(user, pass);
/* When in doubt, use these options */
ftpRequest.UseBinary = true;
ftpRequest.UsePassive = true;
ftpRequest.KeepAlive = true;
/* Specify the Type of FTP Request */
ftpRequest.Method = WebRequestMethods.Ftp.DeleteFile;
/* Establish Return Communication with the FTP Server */
ftpResponse = (FtpWebResponse)ftpRequest.GetResponse();
/* Resource Cleanup */
ftpResponse.Close();
ftpRequest = null;
}
catch (Exception ex) {
//Console.WriteLine(ex.ToString());
try
{
deleteDirectory(deleteFile);
}
catch { }
}
return;
}
和目录删除
/* Delete Directory*/
private void deleteDirectory(string directoryName)
{
try
{
//Check files inside
var direcotryChildren = directoryListSimple(directoryName);
if (direcotryChildren.Any() && (!string.IsNullOrWhiteSpace(direcotryChildren[0])))
{
foreach (var child in direcotryChildren)
{
delete(directoryName + "/" + child);
}
}
/* Create an FTP Request */
ftpRequest = (FtpWebRequest)WebRequest.Create(host + "/" + directoryName);
/* Log in to the FTP Server with the User Name and Password Provided */
ftpRequest.Credentials = new NetworkCredential(user, pass);
/* When in doubt, use these options */
ftpRequest.UseBinary = true;
ftpRequest.UsePassive = true;
ftpRequest.KeepAlive = true;
/* Specify the Type of FTP Request */
ftpRequest.Method = WebRequestMethods.Ftp.RemoveDirectory;
/* Establish Return Communication with the FTP Server */
ftpResponse = (FtpWebResponse)ftpRequest.GetResponse();
/* Resource Cleanup */
ftpResponse.Close();
ftpRequest = null;
}
catch (Exception ex) { Console.WriteLine(ex.ToString()); }
return;
}
列出目录子项
/* List Directory Contents File/Folder Name Only */
public string[] directoryListSimple(string directory)
{
try
{
/* Create an FTP Request */
ftpRequest = (FtpWebRequest)FtpWebRequest.Create(host + "/" + directory);
/* Log in to the FTP Server with the User Name and Password Provided */
ftpRequest.Credentials = new NetworkCredential(user, pass);
/* When in doubt, use these options */
ftpRequest.UseBinary = true;
ftpRequest.UsePassive = true;
ftpRequest.KeepAlive = true;
/* Specify the Type of FTP Request */
ftpRequest.Method = WebRequestMethods.Ftp.ListDirectory;
/* Establish Return Communication with the FTP Server */
ftpResponse = (FtpWebResponse)ftpRequest.GetResponse();
/* Establish Return Communication with the FTP Server */
ftpStream = ftpResponse.GetResponseStream();
/* Get the FTP Server's Response Stream */
StreamReader ftpReader = new StreamReader(ftpStream);
/* Store the Raw Response */
string directoryRaw = null;
/* Read Each Line of the Response and Append a Pipe to Each Line for Easy Parsing */
try { while (ftpReader.Peek() != -1) { directoryRaw += ftpReader.ReadLine() + "|"; } }
catch (Exception ex) { Console.WriteLine(ex.ToString()); }
/* Resource Cleanup */
ftpReader.Close();
ftpStream.Close();
ftpResponse.Close();
ftpRequest = null;
/* Return the Directory Listing as a string Array by Parsing 'directoryRaw' with the Delimiter you Append (I use | in This Example) */
try { string[] directoryList = directoryRaw.Split("|".ToCharArray()); return directoryList; }
catch (Exception ex) { Console.WriteLine(ex.ToString()); }
}
catch (Exception ex) { Console.WriteLine(ex.ToString()); }
/* Return an Empty string Array if an Exception Occurs */
return new string[] { "" };
}
/* List Directory Contents in Detail (Name, Size, Created, etc.) */
public string[] directoryListDetailed(string directory)
{
try
{
/* Create an FTP Request */
ftpRequest = (FtpWebRequest)FtpWebRequest.Create(host + "/" + directory);
/* Log in to the FTP Server with the User Name and Password Provided */
ftpRequest.Credentials = new NetworkCredential(user, pass);
/* When in doubt, use these options */
ftpRequest.UseBinary = true;
ftpRequest.UsePassive = true;
ftpRequest.KeepAlive = true;
/* Specify the Type of FTP Request */
ftpRequest.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
/* Establish Return Communication with the FTP Server */
ftpResponse = (FtpWebResponse)ftpRequest.GetResponse();
/* Establish Return Communication with the FTP Server */
ftpStream = ftpResponse.GetResponseStream();
/* Get the FTP Server's Response Stream */
StreamReader ftpReader = new StreamReader(ftpStream);
/* Store the Raw Response */
string directoryRaw = null;
/* Read Each Line of the Response and Append a Pipe to Each Line for Easy Parsing */
try { while (ftpReader.Peek() != -1) { directoryRaw += ftpReader.ReadLine() + "|"; } }
catch (Exception ex) { Console.WriteLine(ex.ToString()); }
/* Resource Cleanup */
ftpReader.Close();
ftpStream.Close();
ftpResponse.Close();
ftpRequest = null;
/* Return the Directory Listing as a string Array by Parsing 'directoryRaw' with the Delimiter you Append (I use | in This Example) */
try { string[] directoryList = directoryRaw.Split("|".ToCharArray()); return directoryList; }
catch (Exception ex) { Console.WriteLine(ex.ToString()); }
}
catch (Exception ex) { Console.WriteLine(ex.ToString()); }
/* Return an Empty string Array if an Exception Occurs */
return new string[] { "" };
}
很重要的一点
正如刚才提到的..
当它们不为空时，您无法删除它们。您必须递归遍历它们才能删除内容。
public void Deletedir(string remoteFolder)
{
try
{
/* Create an FTP Request */
ftpRequest = (FtpWebRequest)FtpWebRequest.Create(host + "/"+ remoteFolder);
/* Log in to the FTP Server with the User Name and Password Provided */
ftpRequest.Credentials = new NetworkCredential(user, pass);
/* When in doubt, use these options */
ftpRequest.UseBinary = true;***strong text***
ftpRequest.UsePassive = true;
ftpRequest.KeepAlive = true;
/* Specify the Type of FTP Request */
ftpRequest.Method = WebRequestMethods.Ftp.RemoveDirectory;
/* Establish Return Communication with the FTP Server */
ftpResponse = (FtpWebResponse)ftpRequest.GetResponse();
/* Get the FTP Server's Response Stream */
ftpStream = ftpResponse.GetResponseStream();
/* Open a File Stream to Write the Downloaded File */
}
catch { }
}
这是你可以使用的代码。以下是如何使用它，例如，单击按钮。
private void button5_Click(object sender, EventArgs e)
{
ftp ftpClient = new ftp(@"SERVICE PROVIDER", "USERNAME", "PASSWORD");
ftpClient.Deletedir("DIRECTORY U WANT TO DELETE");
}
请记住，您的文件夹应该是EMPTY。