如何在控制器中使用过滤器?

我已经写了一个过滤器函数，它将根据您传递的参数返回数据。我希望在控制器中有相同的功能。是否有可能在控制器中重用过滤器函数?

这是我目前为止尝试过的:

function myCtrl($scope,filter1)
{ 
    // i simply used the filter function name, it is not working.
}

当前回答

下面是在Angular控制器中使用过滤器的另一个例子:

$scope.ListOfPeople = [
    { PersonID: 10, FirstName: "John", LastName: "Smith", Sex: "Male" },
    { PersonID: 11, FirstName: "James", LastName: "Last", Sex: "Male" },
    { PersonID: 12, FirstName: "Mary", LastName: "Heart", Sex: "Female" },
    { PersonID: 13, FirstName: "Sandra", LastName: "Goldsmith", Sex: "Female" },
    { PersonID: 14, FirstName: "Shaun", LastName: "Sheep", Sex: "Male" },
    { PersonID: 15, FirstName: "Nicola", LastName: "Smith", Sex: "Male" }
];

$scope.ListOfWomen = $scope.ListOfPeople.filter(function (person) {
    return (person.Sex == "Female");
});

//  This will display "There are 2 women in our list."
prompt("", "There are " + $scope.ListOfWomen.length + " women in our list.");

很简单吧?

2015-09-09 12:22:21

其他回答

下面是在Angular控制器中使用过滤器的另一个例子:

$scope.ListOfPeople = [
    { PersonID: 10, FirstName: "John", LastName: "Smith", Sex: "Male" },
    { PersonID: 11, FirstName: "James", LastName: "Last", Sex: "Male" },
    { PersonID: 12, FirstName: "Mary", LastName: "Heart", Sex: "Female" },
    { PersonID: 13, FirstName: "Sandra", LastName: "Goldsmith", Sex: "Female" },
    { PersonID: 14, FirstName: "Shaun", LastName: "Sheep", Sex: "Male" },
    { PersonID: 15, FirstName: "Nicola", LastName: "Smith", Sex: "Male" }
];

$scope.ListOfWomen = $scope.ListOfPeople.filter(function (person) {
    return (person.Sex == "Female");
});

//  This will display "There are 2 women in our list."
prompt("", "There are " + $scope.ListOfWomen.length + " women in our list.");

很简单吧?

2015-09-09 12:22:21

AngularJs允许你在模板或控制器、指令等内部使用过滤器。

在模板中可以使用此语法

{{ variable | MyFilter: ... : ... }}

在控制器内部，你可以使用注入$filter服务

angular.module('MyModule').controller('MyCtrl',function($scope, $filter){
    $filter('MyFilter')(arg1, arg2);
})

如果你需要更多的演示例子，这里是一个链接

AngularJs过滤器的例子和演示

2016-05-17 18:00:42

重用Angular.js的过滤器-视图/控制器

这个解决方案涵盖了重用Angular过滤器。这是过滤数据的另一种方式，当我需要这样的时候，谷歌让我来到这里;我喜欢分享。

用例

如果你已经过滤了，比如在你的视图中使用ng-repeat(如下所示)，那么你可能已经在控制器中定义了一个过滤器，如下所示。然后你可以像在最后的例子中那样重用。

过滤器使用示例-视图中已过滤重复

<div ng-app="someApp" ng-controller="someController">
    <h2>Duplicates</h2>
    <table class="table table-striped table-light table-bordered-light">
        <thead>
            <tr>
                <th>Name</th>
                <th>Gender</th>
            </tr>
        </thead>
        <tbody>
            <tr ng-repeat="person in data | filter: searchDuplicate:true">
                <td>{{person.name}}</td>
                <td>{{person.gender}}</td>
            </tr>
        </tbody>
    </table>
</div>

Angular过滤器定义示例

angular.module('someApp',[])
.controller('someController', function($scope, $filter ) {

    $scope.people = [{name: 'Bob', gender: 'male'  , hasDuplicate: true },
                     {name: 'Bob', gender: 'male'  , hasDuplicate: true },
                     {name: 'Bob', gender: 'female', hasDuplicate: false}];

    $scope.searchDuplicate = { hasDuplicate : true };
})

这里的概念是，你已经在使用为视图创建的过滤器，然后意识到你也想在控制器中使用它。

在控制器内使用Filter函数示例1

var dup = $filter('filter')($scope.people, $scope.searchDuplicate, true)

例2:在控制器中使用Filter函数

使用优先筛选器，仅在没有找到重复项时显示按钮。

Html按钮

<div ng-if="showButton()"><button class="btn btn-primary" ng-click="doSomething();"></button></div>

显示/隐藏按钮

$scope.doSomething = function(){ /* ... */ };
$scope.showButton = function(){ return $filter('filter')($scope.people, $scope.searchDuplicate, true).length == 0; };

有些人可能会发现这个版本的过滤很简单，它是一个Angular.js选项。

视图和$filter函数调用中使用的可选比较器参数“true”指定需要严格比较。如果省略，则可以在多个列中搜索值。

https://docs.angularjs.org/api/ng/filter/filter

2020-05-20 23:06:57

使用下面的示例代码，我们可以通过名称过滤angular控制器中的数组。这是基于下面的描述。 http://docs.angularjs.org/guide/filter

这一点。filteredArray = filterFilter数组,{名称:“伊戈尔”});

JS:

 angular.module('FilterInControllerModule', []).
    controller('FilterController', ['filterFilter', function(filterFilter) {
      this.array = [
        {name: 'Tobias'},
        {name: 'Jeff'},
        {name: 'Brian'},
        {name: 'Igor'},
        {name: 'James'},
        {name: 'Brad'}
      ];
      this.filteredArray = filterFilter(this.array, {name:'Igor'});
    }]);

HTML

<!doctype html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Example - example-example96-production</title>
  

  <script src="//ajax.googleapis.com/ajax/libs/angularjs/1.3.0-beta.3/angular.min.js"></script>
  <script src="script.js"></script>
  

  
</head>
<body ng-app="FilterInControllerModule">
    <div ng-controller="FilterController as ctrl">
    <div>
      All entries:
      <span ng-repeat="entry in ctrl.array">{{entry.name}} </span>
    </div>
    <div>
      Filter By Name in angular controller
      <span ng-repeat="entry in ctrl.filteredArray">{{entry.name}} </span>
    </div>
  </div>
</body>
</html>

2014-03-28 04:22:05

似乎没有人提到你可以在$filter('filtername')(arg1,arg2)中使用函数arg2;

例如:

$scope.filteredItems = $filter('filter')(items, function(item){return item.Price>50;});

2017-06-08 14:09:33

如何在控制器中使用过滤器?

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