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AngularJS:如何在angularjs中將數據從視圖傳遞到控制器

[英]AngularJS: How to pass data from view to controller in angularjs

我正在開發一個添加/編輯/刪除聯系人的應用程序。 以下是我添加聯系人視圖模板的方式:

<input placeholder="name" ng-model="contact.name" type="text">
<input placeholder="number" ng-model="contact.number" type="text">
<a href="#/"><button>Add</button></a>

這是我的控制器文件,用於添加的控制器是最后一個:

var myApp = angular.module('myApp', ['ngRoute']).config(function ($routeProvider) {
    $routeProvider.when('/contact/:index', {
        templateUrl: 'partials/edit.html',
        controller: 'Edit'
    }).when('/', {
        templateUrl: 'partials/contacts.html'
    }).when('/add', {
        templateUrl: 'partials/add.html',
        controller: 'Add'
    })
    .otherwise({ redirectTo: '/' });
}).controller('Contacts',  ['$scope',function($scope){
    $scope.contacts = [
    {name:'Hazem', number:'01091703638'},
    {name:'Taha', number:'01095036355'},
    {name:'Adora', number:'01009852281'},
    {name:'Esmail', number:'0109846328'}
    ];
}]).controller('Edit', ['$scope','$routeParams',function($scope,$routeParams){
    $scope.contact = $scope.contacts[$routeParams.index];
    $scope.index = $routeParams.index;
}]).controller('Add', ['$scope', function($scope){
    $scope.contacts.push({name: contact.name, number: contact.number});
}]);

我在chrome檢查器中遇到錯誤:ReferenceError:未定義contactname

請看下面

使用<button ng-click="Add()">Add</button> <a>標簽的instaed

 var myApp = angular.module('myApp', []) .controller('Add', ['$scope', function($scope){ $scope.contacts = []; $scope.Add = function() { $scope.contacts.push({name: $scope.contactname, number: $scope.contactnumber}); } }]); 
 <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script> <div ng-app="myApp"> <div ng-controller="Add"> <input placeholder="name" ng-model="contactname" type="text"> <input placeholder="number" ng-model="contactnumber" type="text"> <button ng-click="Add()">Add</button> <ul> <li ng-repeat="con in contacts">{{con.name}} {{con.number}}</li> </ul> </div> </div> 
在添加控制器更改中

 .controller('Add', ['$scope', function($scope){ $scope.contacts.push({name: contactname, number: contactnumber}); }]); .controller('Add', ['$scope', function($scope){ $scope.contacts.push({name: $scope.contactname, number: $scope.contactnumber}); }]); 
controller('Add', function(){
    this.contacts.push({name: contactname, number: contactnumber});
}]);

每個控制器都有自己的范圍,在Add控制器中,您只是嘗試將未定義的內容$scope.contacts也未定義$scope.contacts的變量中。

另外在您的視圖中,當您將某些內容傳遞給ng-model時,這基本上是在控制器中具有該名稱的變量之間創建雙向數據綁定。 所以在這種情況下,你的html將創建兩個變量: $scope.contactname$scope.contactnumber

在您的視圖中,您還調用了一個函數Add(),該函數尚未在您的控制器上定義。

以下是您的控制器應該是什么樣子:

controller('Add', function(){
   var vm = this;
   vm.contacts = []; //you declare your array of contacts in the controllers scope
   //vm.contacts = getContactsFromDB(); //typically you'd be getting your initial list from a DB

   //As good practice, you should initialize the objects in your scope:
   vm.contactname = '';
   vm.contactnumber = '';

   vm.Add = function() {
     vm.contacts.push({name: vm.contactname, number: vm.contactnumber});
     //Also you could add the data to a database
     /*
       ContactService
       .AddNewContact(vm.contactname, vm.contactnumber)
       .then(function(){
              vm.contacts.push(
                  {name: vm.contactname, number: vm.contactnumber});
       });
     */

     //Finally you should reset the form variables
     vm.contactname = '';
     vm.contactnumber = '';
   }  


}]);

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