如何使用https：// sites运行以下代码。 ？ [英] How to run below code with https:// sites. ?

问题描述

如何为https网站下载pdf文件？

How to do this for https sites for download pdf file??

using (WebClient client = new WebClient())
{
    client.DownloadFile("http://csharpindepth.com/About.aspx", 
                        @"c:\Users\Jon\Test\foo.txt");
}

提前感谢

thanks in advance

推荐答案

从 https 站点下载文件的代码完全相同;您只需将 https URL作为第一个参数传递给 DownloadFile 方法。

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csharpindepth.com 域没有有效的SSL证书，因此您无法通过 https <访问该网站/ code>。



您在评论中提到的401错误意味着您要求的网址需要身份验证，但您尚未提供身份验证细节。设置 WebClient 的 凭据属性 [ ^ ]到a NetworkCredential 实例 [ ^ ]包含正确的凭据。



The code to download a file from an https site is exactly the same; you just pass the https URL as the first parameter to the DownloadFile method.

The csharpindepth.com domain does not have a valid SSL certificate, so you can't access that site over https.

The 401 error you mentioned in the comments means you're requesting a URL which requires authentication, but you haven't provided the authentication details. Set the WebClient's Credentials property[^] to a NetworkCredential instance[^] containing the correct credentials.

using (WebClient client = new WebClient())
{
    client.Credentials = new NetworkCredential("username", "password");
    client.DownloadFile("https://.../file.pdf", @"c:\Users\Jon\Test\downloaded-file.pdf");
}

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