c# - WebClient DownloadString不返回任何内容

我想从“海盗湾”的搜索查询中获取源代码，我的代码中包含此代码，但不返回任何内容:

WebClient webpage = new WebClient();
string source=  webpage.DownloadString("http://thepiratebay.sx/search/documentary/0/99/0");

最佳答案

这是一个快速测试:

xaml:

<Label Content="{Binding ElementName=window_name, Path=SourceTest}"></Label>
<Label Content="{Binding ElementName=window_name, Path=SourceTest2}"></Label>

代码:

string source_url = "http://thepiratebay.sx/search/documentary";

WebClient webpage = new WebClient();
SourceTest = webpage.DownloadString(source_url);
if (SourceTest == "")
SourceTest = "stream was empty.";


source_url = "http://www.google.com";

webpage = new WebClient();
SourceTest2 = webpage.DownloadString(source_url);
if (SourceTest2 == "")
    SourceTest2 = "stream was empty.";

您的网址将返回一个空字符串，另一方面，Google会为您提供所需的来源。

编辑:
正如我假设的那样，您需要像Web浏览器一样进行识别。这适用于您的查询:

string source_url = "http://thepiratebay.sx/search/documentary/0/99/0";

using (var webpage = new WebClient())
{
    webpage.Headers[HttpRequestHeader.UserAgent] = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.2 (KHTML, like Gecko) Chrome/15.0.874.121 Safari/535.2";
    SourceTest = webpage.DownloadString(source_url);
}