WebClient.DownloadString导致错位的人物，由于编码问题，但浏览器就OK [英] WebClient.DownloadString results in mangled characters due to encoding issues, but the browser is OK

问题描述

下面code：

var text = (new WebClient()).DownloadString("http://export.arxiv.org/api/query?search_query=au:Freidel_L*&start=0&max_results=20"));

结果的变量文本包含，在许多其他事情，串

results in a variable text that contains, among many other things, the string

$Iº$ -Minkowski空间，标量场，而洛伦兹不变性的问题

"$κ$-Minkowski space, scalar field, and the issue of Lorentz invariance"

然而，当我访问该网址在Firefox中，我得到

However, when I visit that URL in Firefox, I get

$κ$ -Minkowski空间，标量场，而洛伦兹不变性的问题

$κ$-Minkowski space, scalar field, and the issue of Lorentz invariance

这实际上是正确的。我也试过

which is actually correct. I also tried

var data = (new WebClient()).DownloadData("http://export.arxiv.org/api/query?search_query=au:Freidel_L*&start=0&max_results=20");
var text = System.Text.UTF8Encoding.Default.GetString(data);

不过这给了同样的问题。

but this gave the same problem.

我不知道在哪里的故障就出在这里。是进给卧谈是UTF8-CN codeD，浏览器是足够聪明，明白这一点，但不是 Web客户端？是进给正确UTF8-CN codeD，但 Web客户端未能以其他方式？我能做些什么，以减轻这一点？

I'm not sure where the fault lies here. Is the feed lying about being UTF8-encoded, and the browser is smart enough to figure that out, but not WebClient? Is the feed properly UTF8-encoded, but WebClient is failing in some other way? What can I do to mitigate this?

推荐答案

这不是说谎。你应该在调用DownloadString之前先设置Web客户端的编码。

It's not lying. You should set the webclient's encoding first before calling DownloadString.

using(WebClient webClient = new WebClient())
{
webClient.Encoding = Encoding.UTF8;
string s = webClient.DownloadString("http://export.arxiv.org/api/query?search_query=au:Freidel_L*&start=0&max_results=20");
}

至于为什么你选择不工作，这是因为使用不正确。它应该是：

As for why your alternative isn't working, it's because the usage is incorrect. Its should be:

System.Text.Encoding.UTF8.GetString()

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