使用AngularJS实现一个简单的购物车，主要感受强大的双向绑定和只关注对象不关注界面特性。
先看看界面：
点击+-操作和删除：
这些全部只需要操作数据源就行，不需要关注界面。
实现过程：
一、使用任何语言创建一个服务端：
public class ShoppingCar { public string Title { get; set; } public decimal UnitPrice { get; set; } public int Count { get; set; } }
public ActionResult GetCar() { List<ShoppingCar> cars = new List<ShoppingCar> { new ShoppingCar { Title="苹果",Count=1,UnitPrice=2.5m}, new ShoppingCar { Title="香蕉",Count=3,UnitPrice=1.5m}, new ShoppingCar { Title="苦瓜",Count=1,UnitPrice=3.5m}, new ShoppingCar { Title="黄瓜",Count=3,UnitPrice=2.2m} }; return Json(cars,JsonRequestBehavior.AllowGet); } public ActionResult AddCar(List<ShoppingCar> car) { return Json("ok", JsonRequestBehavior.AllowGet); }
二、前台实现：
<div ng-app="DemoApp" ng-controller='CartController'> <table> <thead> <tr> <td>标题</td> <td>单价</td> <td>数量</td> <td>小计</td> <td>删除</td> </tr> </thead> <tbody> <tr ng-repeat="item in ShoppingCar"> <td>{{item.Title}}</td> <td>{{item.UnitPrice}}</td> <td> <input type="text" ng-cloak ng-model="item.Count"> <button my-adds ng-click="UpdateCar(item.Title,1)" ng-class="{cursors:true}">+</button> <button my-minus ng-click="UpdateCar(item.Title,-1)" ng-class="{cursors:true}">-</button> </td> <td>{{item.Count*item.UnitPrice | number:2}}</td> <td><button my-minus ng-click="UpdateCar(item.Title,-100)" ng-class="{cursors:true}">删</button></td> </tr> </tbody> </table> <p ng-init=0>总价格：{{ total | number:2}}</p> <button type="button" ng-click="submit()">提交</button> </div>
三、Angular部分
var app = angular.module('DemoApp', []); app.controller('CartController', ['$scope', '$http', function ($scope, $http) { $scope.ShoppingCar = {} var GetCar = function () { $http.get('/Employee/GetCar') .success(function (response) { $scope.ShoppingCar = response; GetTotal(); }); } $scope.total = 0; var GetTotal = function () { for (var i = 0; i < $scope.ShoppingCar.length; i++) { var item = $scope.ShoppingCar[i]; $scope.total += item.Count * item.UnitPrice; } } $scope.UpdateCar = function (title, count) { for (var i = 0; i < $scope.ShoppingCar.length; i++) { var item = $scope.ShoppingCar[i]; if (item.Title == title) { item.Count = item.Count + count;//这里可以增加上下限制 if (item.Count < 0) { $scope.ShoppingCar.splice(i, 1); } } } GetTotal(); } $scope.submit = function () { $http.post('/Employee/AddCar', $scope.ShoppingCar) .success(function (response) { alert(response); }); } GetCar(); }]);