为什么在Request.Cookies时foreach循环返回字符串代替的HttpCookie对象吗？ [英] Why does Request.Cookies return string instead of HttpCookie object in foreach loop?

问题描述

今天早上我无意中看到下面的代码片段code，我相当惊讶，因为它工作得很好。

别看它的逻辑请，我只是好奇为何HttpCookieCollection（在这种情况下Request.Cookies时）返回一个字符串（cookie名称），而不是在foreach循环一个的HttpCookie对象。它是一个连贯的问题，因为我们通常得到的HttpCookie对象在此集合按索引/名称？

谢谢，

 的foreach（在System.Web.HttpContext.Current.Request.Cookies串cookieKey）
{
    的HttpCookie tmpCookie = System.Web.HttpContext.Current.Request.Cookies [cookieKey]
    如果（tmpCookie = NULL＆放大器;！＆安培;！tmpCookie [RecentlyVisited] = NULL）
    {
       cookie.Add（tmpCookie）;
    }
}
 

解决方案

它更有意义通过按键集合进行迭代。这样，你可以访问两个按键，可以很容易通过调用访问值 System.Web.HttpContext.Current.Request.Cookies [cookieKey];

This morning I accidentally saw the following snippet code, I was fairly surprised because it work very well.

Don't look at its logic please, I'm just curious why does the HttpCookieCollection (Request.Cookies in this case) return a string (cookie name) instead of a HttpCookie object in foreach loop. Is it a consistency issue because we normally get HttpCookie object in this collection by index/name?

Thanks,

foreach (string cookieKey in System.Web.HttpContext.Current.Request.Cookies)
{
    HttpCookie tmpCookie = System.Web.HttpContext.Current.Request.Cookies[cookieKey];
    if (tmpCookie != null && tmpCookie["RecentlyVisited"] != null)
    {
       cookie.Add(tmpCookie);
    }
}

解决方案

It makes more sense to iterate through a collection by the keys. That way you have access to both the keys and can easily access the value by calling System.Web.HttpContext.Current.Request.Cookies[cookieKey];

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