Mvc–6.controller action method parameter and return value

6.1 Controller receives browser data

A. Get the Get data:

A1: Gets the set parameters that are configured in the routing URL:

such as a configured route:

The browser request path is:/USER/MODIFY/1, after the MVC framework obtains the request, will find the matching route map path URL, know is the request controller class User's Modify method, at this time will check whether this method contains a parameter named ID, if there is, Get the "parameter" {ID} by the configured URL and pass it to this method.

A2. Get the URL by requesting the request from the context object directly:

The browser request path is:/USER/USERLIST/1?FUN=JP

Controller acquisition: request.querystring["Fun"];

B. Get Post data

B1. Get the data submitted by the form by request.form["name"]

B2. Get the data submitted by the form individually by FormCollection form

B3. Get the data for a FORM element one time through the entity Object model and set it to the property of the Entity object

The property name of the form element in the form must be the same as the property of the entity Object!