使用C#将文件上传到FTP


112

我尝试使用C#将文件上传到FTP服务器。文件已上传,但字节为零。

private void button2_Click(object sender, EventArgs e)
{
    var dirPath = @"C:/Documents and Settings/sander.GD/Bureaublad/test/";

    ftp ftpClient = new ftp("ftp://example.com/", "username", "password");

    string[] files = Directory.GetFiles(dirPath,"*.*");

    var uploadPath = "/httpdocs/album";

    foreach (string file in files)
    {
        ftpClient.createDirectory("/test");

        ftpClient.upload(uploadPath + "/" + Path.GetFileName(file), file);
    }

    if (string.IsNullOrEmpty(txtnaam.Text))
    {
        MessageBox.Show("Gelieve uw naam in te geven !");
    }
}

18
为什么将近两年后原始FTP凭证仍然有效?
FreeAsInBeer


您能尝试@Frederic链接到问题中提到的内容并返回...更多吗?此外,您不清楚您要使用哪个api上传ftp ...
deostroll 2015年

Answers:


272

现有的答案是有效的,但是为什么要重新发明轮子并打扰较低级别的WebRequest类型,而又WebClient已经巧妙地实现了FTP上传:

using (var client = new WebClient())
{
    client.Credentials = new NetworkCredential(ftpUsername, ftpPassword);
    client.UploadFile("ftp://host/path.zip", WebRequestMethods.Ftp.UploadFile, localFile);
}

39
只需付一分钱:您可以将魔术字符串“ STOR”替换为WebRequestMethods.Ftp.UploadFile
单击“确定

不幸的是,似乎没有办法使用WebClient创建一个新目录来将文件上传到该目录。
danludwig

1
PSA:不再建议使用webrequest,现在是官方的替代方法
Pacharrin '19

您好,UploadFile方法中的path.zip表示什么?我需要在主机名之后包含文件名吗?我只有一个txt文件要发送,我认为localFile中提到了文件名和该文件的路径。
Skanda

42
public void UploadFtpFile(string folderName, string fileName)
{

    FtpWebRequest request;

    string folderName; 
    string fileName;
    string absoluteFileName = Path.GetFileName(fileName);

    request = WebRequest.Create(new Uri(string.Format(@"ftp://{0}/{1}/{2}", "127.0.0.1", folderName, absoluteFileName))) as FtpWebRequest;
    request.Method = WebRequestMethods.Ftp.UploadFile;
    request.UseBinary = 1;
    request.UsePassive = 1;
    request.KeepAlive = 1;
    request.Credentials =  new NetworkCredential(user, pass);
    request.ConnectionGroupName = "group"; 

    using (FileStream fs = File.OpenRead(fileName))
    {
        byte[] buffer = new byte[fs.Length];
        fs.Read(buffer, 0, buffer.Length);
        fs.Close();
        Stream requestStream = request.GetRequestStream();
        requestStream.Write(buffer, 0, buffer.Length);
        requestStream.Flush();
        requestStream.Close();
    }
}

如何使用

UploadFtpFile("testFolder", "E:\\filesToUpload\\test.img");

在你的foreach中使用它

而且您只需要创建一次文件夹

创建一个文件夹

request = WebRequest.Create(new Uri(string.Format(@"ftp://{0}/{1}/", "127.0.0.1", "testFolder"))) as FtpWebRequest;
request.Method = WebRequestMethods.Ftp.MakeDirectory;
FtpWebResponse ftpResponse = (FtpWebResponse)request.GetResponse();

3
答案错过了对的呼叫request.GetResponse()。没有它,上传将无法(正确地)在某些服务器上工作。请参阅如何:使用FTP上传文件
Martin Prikryl

我很想将-1默默地吞下异常。您能移除那个有害的try-catch-block吗?
Heinzi

32

最简单的方法

使用.NET框架将文件上传到FTP服务器的最简单的方法是使用WebClient.UploadFilemethod

WebClient client = new WebClient();
client.Credentials = new NetworkCredential("username", "password");
client.UploadFile("ftp://ftp.example.com/remote/path/file.zip", @"C:\local\path\file.zip");

高级选项

如果您需要一个更大的控件WebClient(例如TLS / SSL加密,ASCII模式,活动模式等),则无法使用,请使用FtpWebRequest。简单的方法是FileStream使用Stream.CopyTo以下命令将a复制到FTP流:

FtpWebRequest request =
    (FtpWebRequest)WebRequest.Create("ftp://ftp.example.com/remote/path/file.zip");
request.Credentials = new NetworkCredential("username", "password");
request.Method = WebRequestMethods.Ftp.UploadFile;  

using (Stream fileStream = File.OpenRead(@"C:\local\path\file.zip"))
using (Stream ftpStream = request.GetRequestStream())
{
    fileStream.CopyTo(ftpStream);
}

进度监控

如果需要监视上传进度,则必须自己逐块复制内容:

FtpWebRequest request =
    (FtpWebRequest)WebRequest.Create("ftp://ftp.example.com/remote/path/file.zip");
request.Credentials = new NetworkCredential("username", "password");
request.Method = WebRequestMethods.Ftp.UploadFile;  

using (Stream fileStream = File.OpenRead(@"C:\local\path\file.zip"))
using (Stream ftpStream = request.GetRequestStream())
{
    byte[] buffer = new byte[10240];
    int read;
    while ((read = fileStream.Read(buffer, 0, buffer.Length)) > 0)
    {
        ftpStream.Write(buffer, 0, read);
        Console.WriteLine("Uploaded {0} bytes", fileStream.Position);
    } 
}

有关GUI进度(WinForms ProgressBar),请参见以下C#示例:
如何显示使用FtpWebRequest上传的进度栏


上载资料夹

如果要从文件夹上载所有文件,请参阅
使用WebClient将文件目录上载到FTP服务器

有关递归上传,请参见
C#中的递归上传到FTP服务器


10

以下对我有用:

public virtual void Send(string fileName, byte[] file)
{
    ByteArrayToFile(fileName, file);

    var request = (FtpWebRequest) WebRequest.Create(new Uri(ServerUrl + fileName));

    request.Method = WebRequestMethods.Ftp.UploadFile;
    request.UsePassive = false;
    request.Credentials = new NetworkCredential(UserName, Password);
    request.ContentLength = file.Length;

    var requestStream = request.GetRequestStream();
    requestStream.Write(file, 0, file.Length);
    requestStream.Close();

    var response = (FtpWebResponse) request.GetResponse();

    if (response != null)
        response.Close();
}

您无法在代码中读取send file参数,因为它只是文件名。

使用以下内容:

byte[] bytes = File.ReadAllBytes(dir + file);

要获取文件,则可以将其传递给Send方法。


你好,我有一个带文件的文件夹..我怎样才能将其上传到FTP服务器?这段代码我不知道它是如何工作的?
webvision 2013年

在foreach循环中,使用适当的输入调用此方法。
2013年

8
public static void UploadFileToFtp(string url, string filePath, string username, string password)
{
    var fileName = Path.GetFileName(filePath);
    var request = (FtpWebRequest)WebRequest.Create(url + fileName);

    request.Method = WebRequestMethods.Ftp.UploadFile;
    request.Credentials = new NetworkCredential(username, password);
    request.UsePassive = true;
    request.UseBinary = true;
    request.KeepAlive = false;

    using (var fileStream = File.OpenRead(filePath))
    {
        using (var requestStream = request.GetRequestStream())
        {
            fileStream.CopyTo(requestStream);
            requestStream.Close();
        }
    }

    var response = (FtpWebResponse)request.GetResponse();
    Console.WriteLine("Upload done: {0}", response.StatusDescription);
    response.Close();
}

为什么设置KeepAlive = false?您确定需要requestStream.Close()吗?您在内部使用requestStream,因此我认为它将自己关闭流。
凯特

2

在第一个示例中,必须将其更改为:

requestStream.Flush();
requestStream.Close();

首先冲洗,然后关闭。


1

这对我有用,此方法会将SFTP文件传输到网络中的某个位置。它使用SSH.NET.2013.4.7库,一个人可以免费下载。

    //Secure FTP
    public void SecureFTPUploadFile(string destinationHost,int port,string username,string password,string source,string destination)

    {
        ConnectionInfo ConnNfo = new ConnectionInfo(destinationHost, port, username, new PasswordAuthenticationMethod(username, password));

        var temp = destination.Split('/');
        string destinationFileName = temp[temp.Count() - 1];
        string parentDirectory = destination.Remove(destination.Length - (destinationFileName.Length + 1), destinationFileName.Length + 1);


        using (var sshclient = new SshClient(ConnNfo))
        {
            sshclient.Connect();
            using (var cmd = sshclient.CreateCommand("mkdir -p " + parentDirectory + " && chmod +rw " + parentDirectory))
            {
                cmd.Execute();
            }
            sshclient.Disconnect();
        }


        using (var sftp = new SftpClient(ConnNfo))
        {
            sftp.Connect();
            sftp.ChangeDirectory(parentDirectory);
            using (var uplfileStream = System.IO.File.OpenRead(source))
            {
                sftp.UploadFile(uplfileStream, destinationFileName, true);
            }
            sftp.Disconnect();
        }
    }

这个答案似乎是我sftp的唯一解决方案。等待测试。
奥洛伦米·阿吉布卢

1

发布日期:06/26/2018

https://docs.microsoft.com/zh-cn/dotnet/framework/network-programming/how-to-upload-files-with-ftp

using System;
using System.IO;
using System.Net;
using System.Text;

namespace Examples.System.Net
{
    public class WebRequestGetExample
    {
    public static void Main ()
    {
        // Get the object used to communicate with the server.
        FtpWebRequest request = 
(FtpWebRequest)WebRequest.Create("ftp://www.contoso.com/test.htm");
        request.Method = WebRequestMethods.Ftp.UploadFile;

        // This example assumes the FTP site uses anonymous logon.
        request.Credentials = new NetworkCredential("anonymous", 
"janeDoe@contoso.com");

        // Copy the contents of the file to the request stream.
        byte[] fileContents;
        using (StreamReader sourceStream = new StreamReader("testfile.txt"))
        {
            fileContents = Encoding.UTF8.GetBytes(sourceStream.ReadToEnd());
        }

        request.ContentLength = fileContents.Length;

        using (Stream requestStream = request.GetRequestStream())
        {
            requestStream.Write(fileContents, 0, fileContents.Length);
        }

        using (FtpWebResponse response = (FtpWebResponse)request.GetResponse())
        {
            Console.WriteLine($"Upload File Complete, status 
{response.StatusDescription}");
        }
    }
}
}

0

我观察到-

  1. FtpwebRequest丢失。
  2. 由于目标是FTP,因此需要NetworkCredential。

我已经准备了一种方法,可以用参数TargetDestinationPath替换变量ftpurl的值。我已经在winforms应用程序上测试了此方法:

private void UploadProfileImage(string TargetFileName, string TargetDestinationPath, string FiletoUpload)
        {
            //Get the Image Destination path
            string imageName = TargetFileName; //you can comment this
            string imgPath = TargetDestinationPath; 

            string ftpurl = "ftp://downloads.abc.com/downloads.abc.com/MobileApps/SystemImages/ProfileImages/" + imgPath;
            string ftpusername = krayknot_DAL.clsGlobal.FTPUsername;
            string ftppassword = krayknot_DAL.clsGlobal.FTPPassword;
            string fileurl = FiletoUpload;

            FtpWebRequest ftpClient = (FtpWebRequest)FtpWebRequest.Create(ftpurl);
            ftpClient.Credentials = new System.Net.NetworkCredential(ftpusername, ftppassword);
            ftpClient.Method = System.Net.WebRequestMethods.Ftp.UploadFile;
            ftpClient.UseBinary = true;
            ftpClient.KeepAlive = true;
            System.IO.FileInfo fi = new System.IO.FileInfo(fileurl);
            ftpClient.ContentLength = fi.Length;
            byte[] buffer = new byte[4097];
            int bytes = 0;
            int total_bytes = (int)fi.Length;
            System.IO.FileStream fs = fi.OpenRead();
            System.IO.Stream rs = ftpClient.GetRequestStream();
            while (total_bytes > 0)
            {
                bytes = fs.Read(buffer, 0, buffer.Length);
                rs.Write(buffer, 0, bytes);
                total_bytes = total_bytes - bytes;
            }
            //fs.Flush();
            fs.Close();
            rs.Close();
            FtpWebResponse uploadResponse = (FtpWebResponse)ftpClient.GetResponse();
            string value = uploadResponse.StatusDescription;
            uploadResponse.Close();
        }

如有任何问题,请告诉我,或者这里还有一个链接可以为您提供帮助:

https://msdn.microsoft.com/zh-CN/library/ms229715(v=vs.110).aspx

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