Angular实现购物车计算示例代码

时间:2020-05-15 奕佚人气:0

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 class="table table-striped">
      <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" style="width:50px;text-align:center;">
            <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();
  }]);

加载全部内容