AngularJS Dropdown required validation

Question

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> 

Valid means:

Valid values can be anything but "Select Service", it is my default value. Like other ASP.net Require field validator DefaultValue="0" for dropdown, so here My dropdown will be bound from the services and I want to select all other values except "Select Service".

Answer 1

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');     };         } 

Here's a working plunker.