Question

首先，提前感谢任何帮助。我一直在努力想弄清楚如何将角度图表对象挂钩到mysql数据库中。我目前有使用静态数据的图表。我的项目中有一个通用的php文件，看起来像这样：

// Create the connection
$conn = new mysqli($servername, $username, $password, $dbname);

// Check the connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}
//echo "Connected successfully";

//the sql to run
$sql = "SELECT * FROM Test2";
//run it
$result = $conn->query($sql);

//check for results
if ($result->num_rows > 0) {
//create an array
$dataarray[] = array();

//loop em
while($row =mysqli_fetch_assoc($result)) {
    $dataarray[] = $row;
}
//make em json
echo json_encode($dataarray);
}
//} else {
//    echo "0 results";
//}

//close out our connection
$conn->close();
?>

这很好用。此表返回几行，其标题为Name和Value。目前只有测试数据。

在我的html / javascript中，我有以下内容：

<script>
        angular.module("ChartApp", ["chart.js"]).controller("PieCtrl", function ($scope, $http) {
          $http.get('./GetTestData.php').
            success(function(data) {
                $scope.records = data;

            });

          $scope.labels = ["Download Sales", "In-Store Sales", "Mail-Order Sales"];
          $scope.data = [300, 500, 100];
        });
    </script>

我不确定从哪里开始。任何帮助，将不胜感激。

Answer 1

永远，但我终于明白了。我不得不采用JSON对象并将值转换为单独的数组。以下是相关代码：

angular.module("ChartApp", ["chart.js"]).controller("PieCtrl", function ($scope, $http) {
 $http.get('./GetTestData.php').
success(function(data) {
    var names = [];

    for(var i = 0; i < data.length; i++) {
        var obj = data[i];

        if(obj.Name != undefined) {
            names.push(obj.Name);
        }
    }

    var values = [];
    for(var i = 0; i < data.length; i++) {
        var obj = data[i];

        if(obj.Name != undefined) {
            values.push(obj.Value);
        }
    }
    //$scope.records = data;
    $scope.labels = names;
    $scope.data = values;
    });

        });
    </script>

Answer 2

我收到了该代码的跟随错误：

未捕获的TypeError：无法读取属性＆＃39; draw＆＃39;未定义的

所以我必须在[插入]和$scope.data才能使其有效。

$scope.labels = names;
$scope.data = [values];

Angular-chart js并连接到MySQL后端

2 个答案: