Angular.js中的$ http帖子

Question

我刚开始学习Angular.js.如何在Angular.js中重写以下代码？

var postData = "<RequestInfo> "
            + "<Event>GetPersons</Event> "         
        + "</RequestInfo>";

    var req = new XMLHttpRequest();

    req.onreadystatechange = function () {
        if (req.readyState == 4 || req.readyState == "complete") {
            if (req.status == 200) {
                console.log(req.responseText);
            }
        }
    };

    try {
        req.open('POST', 'http://samedomain.com/GetPersons', false);
        req.send(postData);
    }
    catch (e) {
        console.log(e);
    }

这是我到目前为止所拥有的 -

function TestController($scope) {
      $scope.persons = $http({
            url: 'http://samedomain.com/GetPersons',
            method: "POST",
            data: postData,
            headers: {'Content-Type': 'application/x-www-form-urlencoded'}
        }).success(function (data, status, headers, config) {
                $scope.data = data; // how do pass this to $scope.persons?
            }).error(function (data, status, headers, config) {
                $scope.status = status;
            });

}

HTML

<div ng-controller="TestController">    
    <li ng-repeat="person in persons">{{person.name}}</li>
</div>

我是朝着正确的方向吗？

Answer 1

在当前的功能,如果你分配$scope.persons到$http这是一个承诺对象$http返回一个承诺对象.

因此,不应分配scope.persons给$ http,而应分配$scope.persons内部成功,$http如下所述:

function TestController($scope, $http) {
      $http({
            url: 'http://samedomain.com/GetPersons',
            method: "POST",
            data: postData,
            headers: {'Content-Type': 'application/x-www-form-urlencoded'}
        }).success(function (data, status, headers, config) {
                $scope.persons = data; // assign  $scope.persons here as promise is resolved here 
            }).error(function (data, status, headers, config) {
                $scope.status = status;
            });

}

Answer 2

这是Ajay beni给出的解决方案的变体.然后使用该方法允许链接多个promise,因为然后返回一个新的promise.

function TestController($scope) {
    $http({
        url: 'http://samedomain.com/GetPersons',
        method: "POST",
        data: postData,
        headers: {'Content-Type': 'application/x-www-form-urlencoded'}
    })
    .then(function(response) {
            // success
        }, 
        function(response) { // optional
            // failed
        }
    );
}