0

我正在使用我自己的同步器为库FTPLibrary下载 .zip执行调试时，我在此代码中发现错误

数据：Visual Studio 2012。Windows 窗体应用程序 - C#

try
    {
     //Give Message of Command
       NewMessageEventArgs e = new NewMessageEventArgs("COMMAND", "Download File", "RETR");
                        OnNewMessageReceived(this, e);
                        byte[] buffer = new byte[2048];
                        int read = 0;
                        Int64 TotalBytesRead = 0;
                        Int64 FileSize = this.GetFileSize(sourceFilename);
                        DownloadCanceled = false;
                        do
                        {
                            if (DownloadCanceled)
                            {
                                NewMessageEventArgs CancelMessage = new NewMessageEventArgs("RESPONSE", "Download Canceled.", "CANCEL");

                                DownloadCanceled = false;
                                OnNewMessageReceived(this, CancelMessage);
                                return false;
                            }

                            read = DownloadResponseStream.Read(buffer, 0, buffer.Length);
                            DownloadFileStream.Write(buffer, 0, read);
                            TotalBytesRead += read;
                            //Declare Event
                            DownloadProgressChangedArgs DownloadProgress = new DownloadProgressChangedArgs(TotalBytesRead, FileSize);

                            //Progress changed, Raise the event.
                            OnDownloadProgressChanged(this, DownloadProgress);

                            System.Windows.Forms.Application.DoEvents();

                        } while (!(read == 0));


                        //Get Message and Raise Event
                        NewMessageEventArgs NewMessageArgs = new NewMessageEventArgs("RESPONSE", DownloadResponse.StatusDescription, DownloadResponse.StatusCode.ToString());
                        OnNewMessageReceived(this, NewMessageArgs);

                        //Declare Event
                        DownloadCompletedArgs Args = new DownloadCompletedArgs("Successful", true);
                        //Raise Event
                        OnDownloadCompleted(this, Args);

                        DownloadResponseStream.Close();
                        DownloadFileStream.Flush();
                        DownloadFileStream.Close();
                        DownloadFileStream = null;
                        DownloadResponseStream = null;
                    }
                    catch (Exception ex)
                    {
                        //catch error and delete file only partially downloaded
                        DownloadFileStream.Close();
                        //delete target file as it's incomplete
                        targetFI.Delete();

                        //Decalre Event for Error
                        DownloadCompletedArgs DownloadCompleted = new DownloadCompletedArgs("Error: " + ex.Message, false);
                        //Raise Event
                        OnDownloadCompleted(this, DownloadCompleted);
                    }
                }

更多信息，请参见类 FTPLibrary。第 391 行出错。

El error está en :

读取 = DownloadResponseStream.Read(buffer, 0, buffer.Length);

该程序是一个同步器，首先下载一个100 kb的.zip，然后下载150 MB，我们得到以下错误

西班牙语：WebException: Se ha terminado la conexión: Error inesperado de recepción 英语：底层连接已关闭：意外错误

这会导致程序下载 150 MB 然后跳转标记和错误，导致您无法使用该文件进行以后的操作，程序结束。我认为问题出在缓冲区中，而不是如何解决。下载文件时，我使用 Windows 2003 连接到 FTP 服务器。谢谢你，我希望你能帮助我。

4

0 回答 0