AngularJS Dropdown 需要验证 [英] AngularJS Dropdown required validation
本文介绍了AngularJS Dropdown 需要验证的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
以下是我的代码片段.我想使用 angular 验证我的下拉列表.
Following is my code snippet. I want to validate my dropdown using angular.
<td align="left" width="52%">
<span class="requiredSmall">*</span>
<select class="Sitedropdown" style="width: 220px;"
ng-model="selectedSpecimen().serviceID"
ng-options="service.ServiceID as service.ServiceName for service in services">
<option value="" ng-selected="selected">Select Service</option>
</select>
</td>
有效手段:
有效值可以是选择服务"以外的任何值,这是我的默认值.像其他 ASP.net 一样需要字段验证器 DefaultValue="0" 用于下拉列表,所以这里我的下拉列表将从服务中绑定,我想选择除选择服务"之外的所有其他值.
推荐答案
你需要在下拉列表中添加一个name
属性,然后你需要添加一个required
属性,然后您可以使用 myForm.[input name].$error.required
引用错误:
You need to add a name
attribute to your dropdown list, then you need to add a required
attribute, and then you can reference the error using myForm.[input name].$error.required
:
HTML:
<form name="myForm" ng-controller="Ctrl" ng-submit="save(myForm)" novalidate>
<input type="text" name="txtServiceName" ng-model="ServiceName" required>
<span ng-show="myForm.txtServiceName.$error.required">Enter Service Name</span>
<br/>
<select name="service_id" class="Sitedropdown" style="width: 220px;"
ng-model="ServiceID"
ng-options="service.ServiceID as service.ServiceName for service in services"
required>
<option value="">Select Service</option>
</select>
<span ng-show="myForm.service_id.$error.required">Select service</span>
</form>
Controller:
function Ctrl($scope) {
$scope.services = [
{ServiceID: 1, ServiceName: 'Service1'},
{ServiceID: 2, ServiceName: 'Service2'},
{ServiceID: 3, ServiceName: 'Service3'}
];
$scope.save = function(myForm) {
console.log('Selected Value: '+ myForm.service_id.$modelValue);
alert('Data Saved! without validate');
};
}
这是一个有效的 plunker.
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