Question

我想基本上使用以下代码编辑C＃文件：

var file = new StreamReader("ftp://xxx.xxx.x.x/xxx.txt"); //[ip address/file]
        label1.Text = file.ReadLine();
        file.Close();
        var fw = new StreamWriter("ftp://xxx.xxx.x.x/xxx.txt"); //[ip address/file]
        fw.WriteLine(textBox1.Text);
        fw.Close();

但它不起作用，我该怎么做？

Answer 1

通过FTP编辑文件：

下载文件
在本地编辑文件（在内存中）
上传文件

对于步骤1和3，请检查this。

Answer 2

与ftplib库相比，FtpWebRequest看起来非常复杂@ http://ftplib.codeplex.com/

这是他们的例子......

   using (FtpConnection ftp = new FtpConnection("ftpserver", "username", "password"))
   {

   ftp.Open(); /* Open the FTP connection */
   ftp.Login(); /* Login using previously provided credentials */

   if (ftp.DirectoryExists("/incoming")) /* check that a directory exists */
       ftp.SetCurrentDirectory("/incoming"); /* change current directory */

   if (ftp.FileExists("/incoming/file.txt"))  /* check that a file exists */
       ftp.GetFile("/incoming/file.txt", false); /* download /incoming/file.txt as file.txt to current executing directory, overwrite if it exists */

   //do some processing

   try
   {
       ftp.SetCurrentDirectory("/outgoing");
       ftp.PutFile(@"c:\localfile.txt", "file.txt"); /* upload c:\localfile.txt to the current ftp directory as file.txt */
   }
   catch (FtpException e)
   {
       Console.WriteLine(String.Format("FTP Error: {0} {1}", e.ErrorCode, e.Message));
   }

   foreach(var dir in ftp.GetDirectories("/incoming/processed"))
   {
       Console.WriteLine(dir.Name);
       Console.WriteLine(dir.CreationTime);
       foreach (var file in dir.GetFiles())
       {
           Console.WriteLine(file.Name);
           Console.WriteLine(file.LastAccessTime);
       }

Answer 3

查看.NET 4.0中包含的FtpWebRequest类以帮助解决此问题。

Answer 4

我觉得我有点晚了，但是我遇到了和你一样的问题，在我寻找解决方案后，我找到了一种方法来进行更改而无需下载和上传文件。

我的目标是在结束时保存程序执行期间所做的所有更改，并在程序启动时从存储在FTP服务器中的.txt文件加载这些数据。

以下是使用的两种方法：

public static void Save(ArrayList dataStore)
    {
        WebClient request = new WebClient();
        string url = "ftp://ftpname/directory/" + "file.txt";
        request.Credentials = new NetworkCredential("username", "password");
        Stream postStream = request.OpenWrite(url);

        foreach (Data data in dataStore)
        {
            byte[] writeData = Encoding.ASCII.GetBytes(data + "#");
            postStream.Write(writeData, 0, writeData.Length);
        }
    }

public static ArrayList Load()
    {
        ArrayList dataStore = new ArrayList();

        WebClient request = new WebClient();
        string url = "ftp://ftpname/directory/" + "file.txt";
        request.Credentials = new NetworkCredential("username", "password");

        byte[] newFileData = request.DownloadData(url);
        string fileString = Encoding.UTF8.GetString(newFileData);

        if (fileString == "")
        {
            return dataStore;
        }

        string[] dataString = fileString.Split('#');

        foreach (string data in dataString)
        {
            if (data != "")
            {
                dataStore.Add(data);
            }
        }

        return dataStore;
    }

在C＃中通过FTP编辑文本文件？

4 个答案: