使用C将文件上载到FTP#

Question

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 !");
    }
}

Answer 1

.NET 5指南

async Task<FtpStatusCode> FtpFileUploadAsync(string ftpUrl, string userName, string password, string filePath)
{
    FtpWebRequest request = (FtpWebRequest)WebRequest.Create(ftpUrl);
    request.Method = WebRequestMethods.Ftp.UploadFile;
    request.Credentials = new NetworkCredential(userName, password);

    using (FileStream fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read))
    using (Stream requestStream = request.GetRequestStream())
    {
        await fileStream.CopyToAsync(requestStream);
    }

    using (FtpWebResponse response = (FtpWebResponse)await request.GetResponseAsync())
    {
        return response.StatusCode;
    }
}

. NET框架

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foreach中使用此选项

你只需要创建一次文件夹

创建文件夹

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();

Answer 2

使用.NET framework将文件上载到FTP服务器的最简单的方法是使用WebClient。上传文件方法：

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

如果您需要更大的控制，而WebClient不提供（如TLS/SSL加密、ascii/text传输模式、活动模式、传输恢复、进度监控等），请使用FtpWebRequest。简单的方法是使用流将文件流复制到FTP流。复制到：

var url = "ftp://ftp.example.com/remote/path/file.zip";
FtpWebRequest request = (FtpWebRequest)WebRequest.Create(url);
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);
}

如果你需要监控上传进度，你必须自己分块复制内容：

var url = "ftp://ftp.example.com/remote/path/file.zip";
FtpWebRequest request = (FtpWebRequest)WebRequest.Create(url);
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C示例：
我们如何使用FtpWebRequest显示上载进度栏

如果要从文件夹上传所有文件，请参阅
使用WebClient将文件目录上传到FTP服务器。

有关递归上载，请参阅C中的递归上载到FTP服务器#

Answer 3

现有的答案是有效的，但为什么要重新发明轮子，并费心于较低级别的WebRequest类型，而WebClient已经灵活地实现了FTP上传：

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