Question

我正在尝试使用.NET自动化每日检索Web文件。

该文件是PDF，位于类似于：

的地址

http://www.example.com/?s=doc20101022

这些是使用IE

注册调试的HTTP请求的标头

HTTP/1.1 200 OK
Server: Apache/2.2.3 (CentOS)
Vary: User-Agent,Accept-Encoding
Expires: 0
Cache-Control: must-revalidate, post-check=0, pre-check=0
Pragma: public
Last-Modified: Mon, 22 Nov 2010 22:45:12 GMT
Cache-Control: private
Content-Disposition: attachment; filename="doc20101022.pdf"
Content-Transfer-Encoding: binary
Content-Type: application/force-download
Date: Tue, 23 Nov 2010 10:41:43 GMT
X-Varnish: 2155914052
Via: 1.1 varnish
Content-Length: 6596997
Proxy-Connection: Keep-Alive
Connection: Keep-Alive
Age: 2

您能否建议我使用WebClient，WebBrowser或其他VB.NET（Framework 4.0）组件在本地保存并保存它？

Answer 1

使用DownloadFile的DownloadFileAsync或WebClient方法：

WebClient wc = new WebClient();
wc.DownloadFileCompleted += new AsyncCompletedEventHandler(delegate(object source, AsyncCompletedEventArgs args) {
    // Do something when the file has been downloaded successfully.
});
wc.DownloadFileAsync(new Uri("http://www.example.com/?s=doc20101022"), @"C:\Yourfile.pdf");

编辑：您使用c＃标记了问题，并在主题中仅提到了.NET，因此我为您提供了C＃解决方案。如果你在VB.NET中需要它，它应该很容易移植。

如何在.NET中使用WebBrowser或WebClient检索PDF？

1 个答案: