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[英]Dynamically populate 4 drop-down lists with the remaining options with JavaScript jQuery
[英]How to populate 3 drop-down lists dynamically, using Angular Js?
我正在使用Angular js填充3個下拉列表
基於第一個下拉選擇,第二個下拉列表將被填充,基於第二個下拉列表的第三個下拉列表將被填充。
的HTML
<div ng-app ng-controller="myCtrl">
<select ng-model="option1" ng-options="option for option in options1" ng-change="getOptions2()">
</select>
<select ng-model="option2" ng-options="option for option in options2" ng-change="getOptions3()">
</select>
<select ng-model="option3" ng-options="option for option in options3">
</select>
</div>
控制者
var option1Options = ["Men", "Women", "Kids"];
var option2Options = [["Top wear","Bottom wear","Blazers"],
["W-Top Wear","W-Bottom Wear","W-Blazers"],
["K-Top wear","K-Bottom wear","K-others"]];
var option3Options = [["M-Tshirts","M-Casula Shirts","option2 - 3-3"],
["M-Jeans","option2 - 3-2","option2 - 3-3"],
["M-Blazers","option2 - 3-2","option2 - 3-3"],
["w-Tshirts","w-Casula Shirts","w-option2 - 3-3"]];
function myCtrl($scope){
$scope.options1 = option1Options;
$scope.options2 = [];
$scope.options3 = [];
$scope.getOptions2 = function(){
var key = $scope.options1.indexOf($scope.option1);
var myNewOptions = option2Options[key];
$scope.options2 = myNewOptions;
};
$scope.getOptions3 = function(){
var key = $scope.options2.indexOf($scope.option2);
var myNewOptions = option3Options[key];
$scope.options3 = myNewOptions;
};
}
小提琴鏈接 : http : //jsfiddle.net/mayankBisht/Xku9z/513/
問題
您的綁定下拉列表的概念就是這里的問題。 您寧願使用對象數組而不是普通數組。 您不能以這種方式正確地進行映射。
您提供的代碼適用於前兩個級別。 但是這是第三個級別失敗的情況。
您在第3層中指定了4個數組,但在第2層中的各個數組中僅指定了3個元素,因此無法訪問第3層的第4個數組。
其次,對於第一級,您使用元素的索引來獲取相應的列表。 但是問題是第3級很復雜。 我的意思是。
如果用戶選擇
option1
> "Men"
option2
> "Bottom wear"
第三級將是
option3
> ["M-Jeans","option2 - 3-2","option2 - 3-3"]
option3
["M-Jeans","option2 - 3-2","option2 - 3-3"]
option3
["M-Jeans","option2 - 3-2","option2 - 3-3"]
沒關系!
但是,請采取以下情形。
option1
> "Women"
option2
> "W-Bottom Wear"
第三級將是
option3
> ["M-Jeans","option2 - 3-2","option2 - 3-3"]
option3
["M-Jeans","option2 - 3-2","option2 - 3-3"]
option3
["M-Jeans","option2 - 3-2","option2 - 3-3"]
因此,您將看到數組需要采用不同的格式以獲取不同的值。
我建議您為此創建一個array of objects
。 我們可以在其中查找該數組的鍵並獲取相同值的各個值。 請查看以下代碼段,如果您遇到任何問題,請告訴我。
var app = angular.module('myApp', []); var option1Options = ["Men", "Women", "Kids"]; var option2Options = [ ["Top wear", "Bottom wear", "Blazers"], ["W-Top Wear", "W-Bottom Wear", "W-Blazers"], ["K-Top wear", "K-Bottom wear", "K-others"] ]; var option3Options = [{ "Top wear": ["M-Tshirts", "M-Casula Shirts", "option2 - 3-3"] }, { "Bottom wear": ["mens bottom wear here"] }, { "Blazers": ["mens Blazers here"] }, { "W-Top Wear": ["w-Tshirts", "w-Casula Shirts", "w-option2 - 3-3"] }, { "W-Bottom Wear": ["womens bottom wear here"] }, { "W-Blazers": ["womens blazers here"] }, { "K-Top wear": ["K-Tshirts", "K-Casula Shirts", "option2 - 3-3"] }, { "K-Bottom wear": ["kids bottom wear here"] }, { "K-others": ["K-others here"] }]; app.controller('MyController', function MyController($scope) { $scope.options1 = option1Options; $scope.options2 = []; $scope.options3 = []; $scope.getOptions2 = function() { var key = $scope.options1.indexOf($scope.option1); var myNewOptions = option2Options[key]; $scope.options2 = myNewOptions; $scope.options3 = []; }; $scope.getOptions3 = function() { var myNewOptions = option3Options.filter(function(x) { return x[$scope.option2] !== undefined; }) $scope.options3 = myNewOptions[0][$scope.option2]; }; });
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script> <div ng-controller='MyController' ng-app='myApp'> <select ng-model="option1" ng-options="option for option in options1" ng-change="getOptions2()"> </select> <select ng-model="option2" ng-options="option for option in options2" ng-change="getOptions3()"> </select> <select ng-model="option3" ng-options="option for option in options3"> </select> </div>
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