c# - 文件通过 FtpWebRequest 上传到 FTP 后无法删除

Question

这是我上传文件的代码：

                FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));

                reqFTP.Credentials = new NetworkCredential("****", "*****");
                reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
                reqFTP.KeepAlive = false;
                reqFTP.UseBinary = true;
                reqFTP.UsePassive = true;

                reqFTP.ContentLength = stream.Length;
                // reqFTP.EnableSsl = true; // it's FTPES type of ftp

                int buffLen = 2048;
                byte[] buff = new byte[buffLen];
                int contentLen;

                try
                {
                    Stream ftpStream = reqFTP.GetRequestStream();
                    contentLen = stream.Read(buff, 0, buffLen);
                    while (contentLen != 0)
                    {
                        ftpStream.Write(buff, 0, contentLen);
                        contentLen = stream.Read(buff, 0, buffLen);
                    }

                    ftpStream.Flush();
                    ftpStream.Close();
                    ftpStream.Dispose();

                }
                catch (Exception exc)
                {

                    return false;
                }
                //delete image from local

                stream.Flush();
                stream.Close();
                stream.Dispose();

                DeleteFile();

DeleteFile方法尝试删除上传的文件；但它有一个错误，我的应用程序正在使用该文件，因此无法删除它。有没有人可以帮我解决这个问题？！

更新1：

private void DeleteFile()
    {
        DirectoryInfo DirInfo = new DirectoryInfo(@"Direectory Contains uploaded file");
        foreach (FileInfo file in DirInfo.GetFiles())
        {
            file.Delete();
        }
    }

Answer 1

我假设您要删除本地文件？该错误表明该文件仍在使用中。将初始化流变量的代码包装在 using 块中。