无法从网络下载整个文件的问题 [英] Issue with not downloading entire file from web

问题描述

大家好！

我在使用WebClient.DownloadFile命令时遇到问题.它可以处理较小的文件，但是当我尝试使用它下载约300MB的文件时，它并不会下载整个文件.

这是我到目前为止的内容:

Hi everyone!

I am running into an issue with using the WebClient.DownloadFile command. It works with small files, but when I try to use it to download ~300MB file, it doesn''t download the entire file.

Here is what I have so far:

WebClient webClient = new WebClient();
                webClient.DownloadFileCompleted += new AsyncCompletedEventHandler(Completed);
                webClient.DownloadFileAsync(new Uri(@"https://mysite/waveform_db.sdf"), @"c:\db.sdf");

推荐答案

此API非常简化.对于较大的文件，可以在连接断开或应用程序终止以及其他高级情况下继续下载，请使用System.Net.HttpWebRequest:
http://msdn.microsoft.com/en-us/library/system.net. httpwebrequest.aspx [ ^ ].

您可以下载实现了继续下载"功能的现成应用程序HTTPDownloader的源代码，并查看其工作方式:
如何从Internet下载文件 [ ^ ].

另请参阅我过去的答案:
FTP:下载文件 [如何从中下载文件Asp.net 2.0中的服务器 [

This API is very much simplified. For bigger files, the ability to continue downloading after connection was lost or application terminated and other advanced cases, use System.Net.HttpWebRequest:
http://msdn.microsoft.com/en-us/library/system.net.httpwebrequest.aspx[^].

You can download the source code of my ready-to-use application HTTPDownloader with that implements that "continue downloading" feature and see how it works:
how to download a file from internet[^].

See also my past answers:
FTP: Download Files[^],
how to download a file from the server in Asp.net 2.0[^].

—SA

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