ASP.NET MVC下使用AngularJs语言(三)：ng-options

今天使用angularjs的ng-options实现一个DropDownList下拉列表。

准备ASP.NET MVC的model:

public class MobilePhone
    {
        public int ID { get; set; }

        public string Name { get; set; }
    }

接下来，还得准备Entity：

public IEnumerable<MobilePhone> MobilePhones()
        {
            return new List<MobilePhone>()
            {
                {new MobilePhone() { ID = , Name = "华为" }},
                {new MobilePhone() { ID = , Name = "苹果" }},
                {new MobilePhone() { ID = , Name = "小米" }},
                {new MobilePhone() { ID = , Name = "中兴" }}
            };
        }
    }

创建ASP.NET MVC的Controller，一个是视图Action，另一个是数据Action:

public class PhoneController : Controller
    {
        // GET: Phone
        public ActionResult Index()
        {
            return View();
        }

        public JsonResult GetMobilePhones()
        {
            MobilePhoneEntity mpe = new MobilePhoneEntity();
            var model = mpe.MobilePhones();
            return Json(model, JsonRequestBehavior.AllowGet);
        }
    }

最后，我们需要准备一个angularjs的Controller：

pilotApp.controller('PhoneCtrl', ['$http', '$location', '$rootScope', '$scope',
    function ($http, $location, $rootScope, $scope) {
        var obj = {};

        $http({
            method: 'POST',
            url: '/Phone/GetMobilePhones',
            dataType: 'json',
            headers: {
                'Content-Type': 'application/json; charset=utf-8'
            },
            data: JSON.stringify(obj),
        }).then(function (response) {
            $scope.Phones = response.data;
        });

    }]
);

不管是ASP.NET MVC还是AngularJs程序代码均准备好，现在我们需要在ASP.NET MVC视图实现下拉列表：

@{
    ViewBag.Title = "Index";
    Layout = "~/Views/Shared/_Layout.cshtml";
}


<div ng-app="PilotApp" ng-controller="PhoneCtrl">
    <select ng-model="ddlPhones" ng-options="MobilePhone.Name for MobilePhone in Phones"></select>
</div>

<script src="~/Angularjs/app.js"></script>
<script src="~/Angularjs/PhoneController.js"></script>

上面有句ng-options绑定的表达式中，名词所来自何处，可参考下图指示：

动态效果演示：