Request() vs Request.QueryString()

问题

I have recently started using Request("key") instead of Request.QueryString("key") to access my querystring values. However I have read that:

Gets the specified object from the System.Web.HttpRequest.Cookies, System.Web.HttpRequest.Form, System.Web.HttpRequest.QueryString, System.Web.HttpRequest.ServerVariables

Therefore, if I have a querystring key and cookie key which are the same, which value is returned?

回答1:

They're checked in the following order:

1. QueryString
2. Form
3. Cookies
4. ServerVariables

The search is short-circuited, so as soon as a matching key is found the value is returned.

So, to answer your question, a matching QueryString item takes precedence over Cookies.

来源：https://stackoverflow.com/questions/3178536/request-vs-request-querystring