Question

我是图表/角色的新手，自从我使用javascript以来已经很久了。我正在尝试使用Angular中的工厂从服务器获取数据并使用它来填充图表（使用Angular Charts，一个围绕Charts.js的包装）。我最初可以用假数据填充它，但是根本改变它会导致图表变成空白。我在这里有某种范围问题吗？这是相关的代码：

 .controller("LineCtrl", ["$scope", "HRDataPointFactory", function ($scope, HRDataPointFactory) {

        //The following lines cause the chart to populate, but obviously I dont care about this fake data.
        //$scope.labels = ["January", "February", "March", "April", "May", "June", "July"];
        //$scope.series = ["Series A", "Series B"];
        //$scope.data = [
        //    [65, 59, 80, 81, 56, 55, 40],
        //    [28, 48, 40, 19, 86, 27, 90]
        //];
        $scope.onClick = function(points, evt) {
            console.log(points, evt);
        };


        $scope.data = [[]];
        $scope.labels = [];
        $scope.series = ["Department"];

        $scope.getData = function() {
            HRDataPointFactory.getData($scope.department, $scope.dt1, $scope.dt2)
                .then(function (data) {

                    var i;
                    for (i = 0; i < data.data.length; i++) {
                        $scope.data[0].push(data.data[i].EmployeeCount);
                    }

                    for (i = 0; i < data.data.length; i++) {
                        $scope.labels.push(data.data[i].Date);
                    }

                });
        }

        /*unrelated stuff here*/
    }
])
.factory("HRDataPointFactory", function HRDataPointFactory($http) {
    var exports = {};

    exports.getData = function(deptKey, start, end) {
        var config = {
            params: { departmentKey: deptKey, startTime: start, endTime: end  }
        }

        return $http.get("/HR/Data", config)
            .then(function(response) {
                console.log(response);
                return response;
            },function(data) {
                console.log("There was an error!", data);
                return response;
            });
    };

    return exports;
});

和html：

<canvas id="line" class="chart chart-line" chart-data="data"
        chart-labels="labels" chart-legend="true" chart-series="series"
        chart-click="onClick">
</canvas>

感谢您的帮助！

Answer 1

我创建了Plunker with a working example。为了简化，我只提取数据（而不是标签等），但这很容易完成。

在控制器中，我们为此分配vm，并在函数getData中引用vm.data。之前你有$ scope，它是你指定为空白数组的函数中不同的$ scope。

    .controller('MyCtrl', ['$scope', 'HRDataPointFactory', function($scope, HRDataPointFactory) {
      var vm = this;
      //The following lines cause the chart to populate, but obviously I dont care about this fake data.
      vm.labels = ["January", "February", "March", "April", "May", "June", "July"];
      vm.series = ["Series A", "Series B"];
//      vm.data = [
//        [65, 59, 80, 81, 56, 55, 40],
//        [28, 48, 40, 19, 86, 27, 90]
//      ];
      vm.onClick = function(points, evt) {
        console.log(points, evt);
      };

      vm.data = [
        []
      ];
      vm.getData = function() {
        HRDataPointFactory.getData($scope.department, $scope.dt1, $scope.dt2)
          .then(function(success) {
            console.log(JSON.stringify(success));
            vm.data = success.data;

          });
      }
      vm.getData();

      /*unrelated stuff here*/
    }])

我在控制台中打印收到的数据：

{"data":[[65,59,80,81,56,55,40],[28,48,40,19,86,27,90]],"status":200,"config":{"method":"GET","transformRequest":[null],"transformResponse":[null],"params":{},"url":"data","headers":{"Accept":"application/json, text/plain, */*"}},"statusText":""}

数据也在plunker上托管，使用它作为格式：

[
    [65, 59, 80, 81, 56, 55, 40],
    [28, 48, 40, 19, 86, 27, 90]
]

请注意，我还使用＆＃34;控制器作为＆＃34; HTML中的语法以遵循最佳做法...请参阅john papa's article on this subject。

 <div ng-controller="MyCtrl as vm">
<canvas id="line" class="chart chart-line" chart-data="vm.data"
        chart-labels="vm.labels" chart-legend="true" chart-series="vm.series"
        chart-click="onClick">
</canvas>

  </div>

告诉我们。

Angular Charts.js：无法使用数据刷新图表

1 个答案: