C# UrlReferrer 到底是什么意思？
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what does UrlReferrer exactly mean?
提问by SilverLight
what does UrlReferrer(Request.UrlReferrer& Request.UrlReferrer.OriginalString) exactly mean?
i wrote these codes :
UrlReferrer( Request.UrlReferrer& Request.UrlReferrer.OriginalString) 到底是什么意思？
我写了这些代码：
if (Request.UrlReferrer != null)
{
User_Info.Add(!string.IsNullOrEmpty(Request.UrlReferrer.OriginalString) ? Request.UrlReferrer.OriginalString : string.Empty);//6:UrlReferrer
}
else
{
User_Info.Add(string.Empty);
}
i just know ReturnUrl querystring when a user tries to login to admin area.
so in web.config <authentication mode="Forms">
and now we have UrlReferrer server-side code.
i want to gather some information about my users of my web site such as User-Agent , User-Browser , Session-ID , etc...
but i really do n't know what does UrlReferrer exactly do and it is always null.(i think because of wrong usage)
would you please give me a simple example for understanding.
当用户尝试登录管理区域时，我只知道 ReturnUrl 查询字符串。
所以在 web.config 中<authentication mode="Forms">
，现在我们有了 UrlReferrer 服务器端代码。
我想收集一些关于我的网站用户的信息，例如 User-Agent 、 User-Browser 、 Session-ID 等......
但我真的不知道 UrlReferrer 到底做了什么，它总是为空。 （我认为是因为错误的用法）
请你给我一个简单的例子来理解。
thanks for attention
谢谢关注
采纳答案by eyossi
quote:
引用：
When visiting a webpage, the referrer or referring page is the URL of the previous webpage from which a link was followed.
访问网页时，引荐来源网址或引荐页面是链接所来自的前一个网页的 URL。
for more information you can go to http://en.wikipedia.org/wiki/HTTP_referer
有关更多信息，您可以访问http://en.wikipedia.org/wiki/HTTP_referer
It can be null if you someone opened a browser and just entered your site address (without pressing a link to get there)
如果您打开浏览器并输入您的站点地址（没有按链接到达那里），则它可以为空
