使用C#读取userAgent [英] Reading the userAgent with C#

问题描述

我有以下代码，该代码读取userAgent并根据使用indexOf匹配的值执行一些逻辑:

I have the following code which reads the userAgent and does some logic based on the values matched using indexOf:

String userAgent;
userAgent = Request.UserAgent;
// If it's not IE
if (userAgent.IndexOf("MSIE") < 0)
{
    return RedirectToAction("Index", "Home", new { area = "Dashboard" });
}
// If it's IE BUT ChromeFrame
else if(userAgent.IndexOf("ChromeFrame") > -1)
{
    return RedirectToAction("Index", "Home", new { area = "Dashboard" });
}
// It's just IE
else
{
    return View("ChromeFrame");
}

如果是IE，则它应该返回视图，或者如果它的IE但包含ChromeFrame，则它应该重定向，并且它是另一个浏览器，那么它也应该重定向.

If it's IE then it should return the view or if its IE but contains ChromeFrame then it should redirect and it's another browser then it should redirect as well.

我认为问题出在代码的> 0部分.比较信息的正确方法是什么?谢谢.

I think the problem is with the > 0 part of the code. What is the correct way of comparing info? Thanks.

推荐答案

只需使用

Just use the contains method, which will make your code less cryptic and less error-prone.

if (userAgent.Contains("MSIE"))
{
    return RedirectToAction("Index", "Home", new { area = "Dashboard" });
}

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