如何停止后台下载器 [英] How to stop background downloader

问题描述

我正在尝试在后台下载文件。通过一项小型研究，我发现了这个小类： C＃.NET后台文件下载器。您将在该链接中找到整个代码。



所以我的问题是我无法删除下载的文件，直到我的表单关闭。我如何处理文件，以便我可以删除它们？我尝试使用downloader.Stop（）;然而，这不是诀窍。手柄未配置。我也试过downloader.IsBusy = false;这是相同的，但它也没有用。



我很确定我在这里错过了一些简单的东西。对不起烦恼。



这是尝试删除文件时抛出的异常：

 An未处理的类型'  System.IO.IOException'发​​生 in  mscorlib.dll 
 
附加信息：进程无法访问文件'  C：\ Users \ path \ download.exe'因为 正由另一个进程使用。

我正在做什么的小型复制品。

 downloader.LocalDirectory = mp3Path; 
 downloader.Files.Clear（）; 
 downloader.Files.Add（ new  FileDownloaderApp.FileDownloader.FileInfo（aLinks [Link]））; 
 downloader.Start（）; 
  //   Thread.Sleep（500）;  
 downloader.DeleteCompletedFilesAfterCancel = < span class =code-keyword> true ; 
 downloader.Stop（）; 
 downloader.IsBusy =  false ; 
  //   Thread.Sleep（500）;  
 File.Delete（mp3Path +   \\ + downloader.CurrentFile.Name）; 

我正在尝试为curropted文件/链接执行此操作。

解决方案

选项＃1：加载 文章页面 ，找到评论和讨论，点击添加评论或问题并提出问题;作者将收到通知，并有机会回答你。



或者，选项＃2：拿我的HttpDownloader，其中大部分代码都写在了本质上下载，没有所有UI（仅限控制台），可以继续下载或部分下载的文件，修改它以满足您的需要。由于此代码直接逐块实现读/写循环，因此很容易实现： 如何从互联网上下载文件 。



有些背景，另见：

FTP：下载文件 ，

如何从Asp.net 2.0中的服务器下载文件 。

-SA

I am trying to download a file in the background. With a small research i did i found this small class: C# .NET Background File Downloader. You will find the entire code in that link.

So my problem is that i can't delete the downloaded files until my form is closed. How can i dispose the files so i can delete them? I tried using downloader.Stop(); however that was not the trick. The handle is not disposed. I also tried downloader.IsBusy = false; which is the same but it didn't work neither.

I am pretty sure i am missing something simple here. Sorry for the troubles.

This is the exception thrown when trying to delete the file:

An unhandled exception of type 'System.IO.IOException' occurred in mscorlib.dll

Additional information: The process cannot access the file 'C:\Users\path\download.exe' because it is being used by another process.

A small reproducer of what i am doing.

downloader.LocalDirectory = mp3Path;
downloader.Files.Clear();
downloader.Files.Add(new FileDownloaderApp.FileDownloader.FileInfo(aLinks[Link]));
downloader.Start();
//Thread.Sleep(500);
downloader.DeleteCompletedFilesAfterCancel = true;
downloader.Stop();
downloader.IsBusy = false;
//Thread.Sleep(500);
File.Delete(mp3Path + "\\" + downloader.CurrentFile.Name);

I am trying to do this for curropted files/links.

解决方案

Option #1: load the article page, locate "Comments and Discussions", click "Add a Comment or Question" and ask a question; the author will be given a notification and a chance to answer you.

Alternatively, option #2: take my HttpDownloader, which has mostly the code written on the essence of downloading, without all that UI (console-only) and can continue downloading or a partially downloaded file, modify it to suit your needs. As this code directly implements the reading/writing loop block by block, it will be very easy to do: how to download a file from internet.

For some background, see also:
FTP: Download Files,
how to download a file from the server in Asp.net 2.0.

—SA

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