我有以下控制器代碼來返回圖表數據到jquery。 更新:我修改了建議的代碼,但仍然出現錯誤。從控制器加載數據到圖表Jquery/MVC/C#
public JsonResult GetLeaveDataForPieChart(int user_id)
{
List<EmployeeLeaveHeader> elh1 = new List<EmployeeLeaveHeader>();
List<ChartEvent> ch = new List<ChartEvent>();
elh1 = itlbg1.EmployeeLeaveHeaders.Where(f => f.Employee_ID == user_id).ToList();
foreach (var item in elh1)
{
ChartEvent ce = new ChartEvent();
ce.value = (item.leaveAvailable * 100).ToString();
ce.color = item.CompanyLeaves.LeaveTypes.color;
ce.highlight = "#ffffff";
ce.label = item.CompanyLeaves.LeaveTypes.typeDescription + " Leave Available";
ch.Add(ce);
ChartEvent ce1 = new ChartEvent();
ce1.value = (item.leaveTaken * 100).ToString();
ce1.color = item.CompanyLeaves.LeaveTypes.color_light;
ce1.highlight = "#ffffff";
ce1.label = item.CompanyLeaves.LeaveTypes.typeDescription + " Leave Taken";
ch.Add(ce1);
}
return Json(ch, JsonRequestBehavior.AllowGet);
}
我需要在jquery中檢索數據,以便它以需要的格式傳遞到餅圖數據。
(document).ready(function() {
user_id = $("#user_id_1").text();
$.ajax({
url: '/Leave/GetLeaveDataForPieChart/',
cache: false,
data: { user_id: user_id },
type: "GET",
datatype: "json",
success: function (data) {
alert(data);
var pieChartCanvas = $("#pieChart").get(0).getContext("2d");
var pieChart = new Chart(pieChartCanvas);
var PieData = $.each(data, function (idx, obj) {
var leave = new Object();
leave.value = obj.value;
leave.color = obj.color;
leave.highlight = obj.highlight;
leave.label = obj.label;
alert(leave);
return leave;
});
var pieOptions = {
//pie options..
};
pieChart.Doughnut(PieData, pieOptions);
}
});
任何人都可以解釋如何將json數據轉換爲javascript對象傳遞給餅圖嗎?
VAR OBJ = EVAL(PieData) –
什麼是EVAL這裏是指()? 請解釋它如何與更新的代碼相關。 –