MVC-从视图调用控制器 [英] MVC - calling controller from view

问题描述

我是MVC的新手

我正在使用MVC开发Web应用程序，该应用程序仅包含一页.

I am developing a web application using MVC and the application contains only one page.

因此在该视图中，我必须填充多个数据.假设该应用程序是新闻提要"应用程序，则需要填充最近的新闻，您喜欢的新闻，您的朋友推荐的新闻等.因此，我应该从视图向所有必需的控制器进行ajax调用以获取这些数据并追加在视图中?

So in that view I have to populate multiple data. Say if the application is a "News feed" application, i need to populate recent news, news liked by you, news recommended by your friends etc. So should I make a ajax call from view to all required controllers to fetch these data and append in the view??

当前，我能够通过对控制器进行ajax调用并获取数据来获取数据，但是据我的理解，该控制器首先在MVC中被调用，它以我当前使用的方式呈现视图我正在从视图中回叫控制器.

Currently i am able to get the data by making an ajax call to controller and fetching the data, but as per my understanding, the controller is called first in a MVC and it renders the view and in the way i am currently using I am calling the controller back from view.

此方法正确吗?在MVC中达到此结果的正确方法是什么?

Is this method correct ?? what is the right approach to achieve this result in MVC?

如果我必须使用Ajax调用控制器并获取数据，那么MVC中会有什么不同? 在3层应用程序中，我将对某些Web方法或处理程序进行Ajax调用，该处理程序将返回一些数据 在这里，我正在调用一个动作结果函数，该函数再次返回一些数据

If i have to use Ajax call to controller and get data, what is going to be the different in MVC? In 3-tier app i will make ajax call to some web method or a Handler which will return some data here I am calling an action result function which is again returning some data

推荐答案

是的，您可以像这样使用ajax调用

Yes you can use ajax call like this

$(document).ready(function () {
            $('#CategoryId').change(function () {
                $.getJSON('/Publication/AjaxAction/' + this.value, {},
                  function (html) {
                      $("#partial").html(html);

                      alert("go");
                  });
            });
        });

，然后从控制器中加载局部视图.

and then load a partial view from your contoller.

public ActionResult AjaxAction(int Id)
        {
            if (Request.IsAjaxRequest())
            {
                if (Id== 1)
                {
                    ViewBag.SourceTypeId = new SelectList(db.SourceTypes, "Id", "Title");
                    ViewBag.CityId = new SelectList(db.Cities, "Id", "Title");
                    return PartialView("_CreateStatya");
                }
            }
            return PartialView();
        }

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