Request, request. querystring, request. Form, and request. Params

Request. Form: Get the data submitted in post mode (receive the data submitted by form );

Request. querystring: Get the address bar parameters (data submitted in get Mode)

Request: contains the preceding two methods (obtain the data submitted by the get method first), which are searched in order in querystring, form, and servervariable.
And sometimes different results are obtained. If you only need a data in form, but you use request instead of request. formProgramYou can also search for querystring and servervariable. If the same name exists in your querystring or servervariable, you don't get the expected value.

Request. params is a set of all post and get values. params is actually a set, which in turn includes request. querystring, request. form, request. cookies and requests. servervariable.