Aurelia的依赖/级联下拉列表
我想在Aurelia创建依赖的下拉菜单.
依赖下拉列表的含义是,如果您单击第一个下拉列表中的项目,则第二个下拉列表中的选项将根据您单击的内容进行过滤.如果你看看我的js-fiddle,你会注意到如果你在第一个下拉列表中选择丰田,那么第二个就是丰田车型(卡罗拉,凯美瑞等).如果你在第一个下拉列表中选择本田,第二个用本田车型(雅阁,思域等)填充.你明白了. 它非常简单,只需很少的代码就可以在Angular中执行此操作,我想知道在Aurelia中执行此操作是否也简单明了.在Aurelia,我无法找到有关如何做到这一点的资源.下面的小提琴演示了我想要完成的内容(除了我想在Aurelia中做,当然不是Angular).任何帮助将非常感激.谢谢! https://jsfiddle.net/nhunt3/wjvvjwzx/ HTML: <div ng-app="myApp" ng-controller="myController"> My Cars <br /> <table> <thead> <tr> <td>Make</td> <td>Model</td> </tr> </thead> <tbody> <tr ng-repeat="car in myCars track by car.uid"> <td> <select ng-model="car.MakeUID" ng-options="make.uid as make.name for make in makes" /> </td> <td> <select ng-model="car.ModelUID" ng-options="model.uid as model.name for model in models | filter: { parentID: car.MakeUID } : true" /> </td> </tr> </tbody> </table> </div> JavaScript的: // the main (app) module var myApp = angular.module("myApp",[]); angular.module('myApp',[]).controller('myController',function($scope) { $scope.makes = [ {name:'Toyota',uid:1},{name:'Honda',uid:2},{name:'Ford',uid:3} ]; $scope.models = [ {name:'Yaris',uid:1,parentID:1},{name:'Corolla',uid:2,{name:'Camry',uid:3,{name:'Highlander',uid:4,{name:'Accord',uid:5,parentID:2},{name:'Civic',uid:6,{name:'Pilot',uid:7,{name:'Focus',uid:8,parentID:3},{name:'Fiesta',uid:9,{name:'Fusion',uid:10,{name:'F-150',parentID:3} ]; $scope.myCars = [ {uid:1,MakeUID:1,ModelUID:2},{uid:2,ModelUID:3},{uid:3,MakeUID:3,ModelUID:8} ]; }); 解决方法
对于找到此主题的其他用户:
app.html <template> <require from="./filter"></require> <table> <thead> <tr> <td>Make</td> <td>Model</td> </tr> </thead> <tbody> <tr repeat.for="car of myCars"> <td> <select value.bind="car.MakeUID" change.delegate="resetModel(car)"> <option value="0">select one of ...</option> <option repeat.for="make of makes" model.bind="make.uid">${make.name}</option> </select> </td> <td> <select value.bind="car.ModelUID"> <option value="0">select one of ...</option> <option repeat.for="model of models | filter:'parentID':car.MakeUID" model.bind="model.uid">${model.name}</option> </select> </td> </tr> </tbody> </template> app.js export class App { makes = [ {name:'Toyota',uid:3} ]; models = [ {name:'Yaris',parentID:3} ]; myCars = [ {uid:1,ModelUID:8} ]; resetModel(car) { car.ModelUID = 0; } } filter.js export class FilterValueConverter { toView(array,propertyName,filter_on) { return array.filter(i => i[propertyName] == filter_on); } } 老答案 我认为这与Aurelia中的Angular代码相同: <template> <require from="./filter"></require> <table> <thead> <tr> <td>Make</td> <td>Model</td> </tr> </thead> <tbody> <tr repeat.for="car of myCars"> <td> <select value.bind="car.MakeUID" ref="selected_car"> <option repeat.for="make of makes" value.bind="make.uid">${make.name}</option> </select> </td> <td> <select value.bind="car.ModelUID"> <option repeat.for="model of models | filter:'parentID':selected_car.value">${model.name}</option> </select> </td> </tr> </tbody> </template> 而且你还需要这个过滤器: export class FilterValueConverter { toView(array,filter_on) { return array.filter(i => i[propertyName] == filter_on); } } https://gist.run/?id=91b23375e0b73afe7f21825f67cfeabf (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |