AngularJS $ http.get循環內

Question

我在C＃Web服務中使用angular.js，我需要逐項增加ng-repeat以在數據更新時向用戶顯示，為此我嘗試在循環內使用$ http.get進行刷新每個項目中的數據。 但是它不起作用

for (var i = 0; i < conditions.length; i++) {
        var configFullAsset = {
            params: {
                Field: Field,
                SAM_ConnectionString: SAM_ConnectionString,
                TreeElemId: conditions[i][0],
                ConditionDate: conditions[i][1]
            }
        };
        $http.get('application.asmx/getExtFullAssetHealth', configFullAsset)
            .success(function (responseExt) {
                console.log("Element: ", i);
                if (i == 0) 
                {
                    $scope.showData = responseExt;

                    $scope.fullAssetTable_loading = false;
                    $scope.fullAssetTable_loaded = true;
                }
                else
                    $scope.showData = $scope.showData.concat(responseExt);

                //console.log("Data item: ", $scope.showData[i].Tag);

                $scope.fullData = $scope.showData;
                $scope.filterData(customFilter);
            })
            .catch(function (err) {
                console.log("Error get object: ", err);
            })
            .finally(function () {
                // Hide loading spinner whether our call succeeded or failed.
                //$scope.loading = false;


                $scope.fullData = $scope.showData;
                $scope.filterData(customFilter);
                $scope.fullAssetTable_loading = false;
                $scope.fullAssetTable_loaded = true;

                console.log($scope.fullData);
            });
    }

Answer 1

代碼的主要問題是休閑性：您在成功方法中將i用作索引，但並非您所期望的那樣，因為循環結束直到調用您的第一次成功為止。

您可以在第一階段建立這樣的請求，更容易閱讀：

function buildRequests() {
    return conditions.map(function(condition) {
        var configFullAsset = {
            params: {
                Field: Field,
                SAM_ConnectionString: SAM_ConnectionString,
                TreeElemId: condition[0],
                ConditionDate: condition[1]
            }
        };

        return $http.get('application.asmx/getExtFullAssetHealth', configFullAsset);
    });
}

比您可以處理以下所有請求：

function handleRequests() {
    var requests = buildRequests();
    $q.all(requests)
        .then(handleRequests)
        .catch(function(error) {
            console.log(error);
        })
        .finally(function() {
            $scope.fullData = $scope.showData;
            $scope.filterData(customFilter);
            $scope.fullAssetTable_loading = false;
            $scope.fullAssetTable_loaded = true;
        });
}

比遍歷每個結果進行更改：

function handleResults(results) {
    results.forEach(function(response, i) {
        console.log("Element: ", i);
        if (i == 0) 
        {
            $scope.showData = response;

            $scope.fullAssetTable_loading = false;
            $scope.fullAssetTable_loaded = true;
        }
        else
            $scope.showData = $scope.showData.concat(response);

        //console.log("Data item: ", $scope.showData[i].Tag);

        $scope.fullData = $scope.showData;
        $scope.filterData(customFilter);
    });
}

不要忘記注入$ q作為依賴項注入。