C# 修改webbrowser 的 useragent

最新推荐文章于 2020-09-16 12:54:10 发布

转载最新推荐文章于 2020-09-16 12:54:10 发布 · 357 阅读

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本文介绍了一种通过调用UrlMkSetSessionOption函数来更改Web浏览器用户代理的方法。此方法首先刷新设置，然后更新用户代理字符串。这种方法适用于需要模拟不同浏览器行为的应用场景。

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Also, there is a refresh option in the function (according to MSDN). It worked well for me (you should set it before any user agent change). Then the question code could be changed like this:

[DllImport("urlmon.dll", CharSet = CharSet.Ansi)]
private static extern int UrlMkSetSessionOption(
    int dwOption, string pBuffer, int dwBufferLength, int dwReserved);

const int URLMON_OPTION_USERAGENT = 0x10000001;
const int URLMON_OPTION_USERAGENT_REFRESH = 0x10000002;

public void ChangeUserAgent()
{
    string ua = "Googlebot/2.1 (+http://www.google.com/bot.html)";

    UrlMkSetSessionOption(URLMON_OPTION_USERAGENT_REFRESH, null, 0, 0);
    UrlMkSetSessionOption(URLMON_OPTION_USERAGENT, ua, ua.Length, 0);
}

http://stackoverflow.com/questions/937573/changing-the-user-agent-of-the-webbrowser-control

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