[英]Could not set value dynamically into drop down list using Angular.js
I am unable to set value dynamically into drop down list using Angular.js.我无法使用 Angular.js 将值动态设置到下拉列表中。 Here is my code:这是我的代码:
<div class="input-group bmargindiv1 col-md-12">
<span class="input-group-addon ndrftextwidth text-right" style="width:180px">Business Name :</span>
<select class="form-control" id="restau" ng-model="subcat" ng-options="qua.name for qua in listOfRestaurant | orderBy:'name' track by qua.value" ng-change="getDayFromSpecial('restau');">
<option value="">Select Business Name</option>
</select>
</div>
<input type="button" id="btn" value="Open" ng-click="openGallery();">
<input type="button" id="btn1" value="select" ng-click="openSelect();">
My controller side code is given below.我的控制器端代码如下。
$scope.openSelect=function(){
$scope.subcat.value="1";
}
Here I am trying to set value using button click but it's throwing error.在这里,我尝试使用按钮单击设置值,但它抛出错误。 Here is my plunkr code.这是我的 plunkr代码。
Because you haven't define $scope.subcat
object yet & you're trying to assign value property of it.因为您还没有定义$scope.subcat
对象并且您正在尝试为其分配 value 属性。
$scope.subcat = {}; //define it inside controller
$scope.openSelect=function(){
$scope.subcat.value = "1";
}
Warning: as you're only setting
value
property of object,ng-options
would select option for you in dropdown.警告:由于您只设置对象的value
属性,ng-options
会在下拉列表中为您选择选项。 But what about otherproperty
values.但是其他property
值呢? If you are assumingvalue
as unique constraint & totally responsible entire record identity then its completely fine.如果您将value
假设为唯一约束和完全负责的整个记录身份,那么它完全没问题。
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