当尝试上传(ftp)时,C#用空文件覆盖文件

本文关键字:文件 覆盖 ftp | 更新日期: 2023-09-27 18:27:29

我正试图通过ftp上传文本文件,当我运行程序时,它会清空我的文件,然后上传。我不知道为什么。。。可能会改写或其他什么。。。这是我的代码:

这是主类

        /* Create Object Instance */
        ftp ftpClient = new ftp(@"ftp://sportcaffe.me", "sport***", "*****");
        /* Upload a File */
        ftpClient.upload("public_html/test.txt", @"C:'Users'Lazar'Desktop'test.txt");

这里是ftp类的函数代码:

/* Upload File */
    public void upload(string remoteFile, string localFile)
    {
        try
        {
            /* Create an FTP Request */
            ftpRequest = (FtpWebRequest)FtpWebRequest.Create(host + "/" + remoteFile);
            /* 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.UploadFile;
            /* Establish Return Communication with the FTP Server */
            ftpStream = ftpRequest.GetRequestStream();
            /* Open a File Stream to Read the File for Upload */
            FileStream localFileStream = new FileStream(localFile, FileMode.Create);
            /* Buffer for the Downloaded Data */
            byte[] byteBuffer = new byte[bufferSize];
            int bytesSent = localFileStream.Read(byteBuffer, 0, bufferSize);
            /* Upload the File by Sending the Buffered Data Until the Transfer is Complete */
            try
            {
                while (bytesSent != 0)
                {
                    ftpStream.Write(byteBuffer, 0, bytesSent);
                    bytesSent = localFileStream.Read(byteBuffer, 0, bufferSize);
                }
            }
            catch (Exception ex) { MessageBox.Show(ex.ToString()); }
            /* Resource Cleanup */
            localFileStream.Close();
            ftpStream.Close();
            ftpRequest = null;
        }
        catch (Exception ex) { MessageBox.Show(ex.ToString()); }
        return;
    }

没有错误和警告。。。

首先我在我的文件中写了一些东西并保存,然后当我运行程序时,我的文件是空的,empy文件已经上传。。。

我用了这个代码http://www.codeproject.com/Tips/443588/Simple-Csharp-FTP-Class

当尝试上传(ftp)时,C#用空文件覆盖文件

FileStream localFileStream = new FileStream(localFile, FileMode.Create);

我希望我不需要太清楚地拼写出来,但上面的行被告知创建文件。引用文档:"指定操作系统应该创建一个新文件。如果文件已经存在,它将被覆盖。"

http://msdn.microsoft.com/en-us/library/system.io.filemode(v=vs.110).aspx有一个选项列表,您可以在此处使用。FileMode.Open应该适合您的需要(它将打开文件,如果文件不存在,则抛出异常)。

已解决

FileStream localFileStream=新的FileStream(localFile,FileMode.Create);替换FileMode。按FileMode创建。打开