[英]Kendo UI Chart - Visualize count of returned JSON fields
我想在饼图/甜甜圈图中显示特定检索字段的计数。 我通过REST检索数据,结果为json格式。 源是一个重复值的列表:
示例:在下面的列表中,我想获得一份完整的已完成回复的数量(计数); 也许在第二张图表中按位置列出了响应的细分。
var userResponse = [
{ User: "Bob Smith", Status: "Completed", Location: "USA" },
{ User: "Jim Smith", Status: "In-Progress", Location: "USA" },
{ User: "Jane Smith", Status: "Completed", Location: "USA" },
{ User: "Bill Smith", Status: "Completed", Location: "Japan" },
{ User: "Kate Smith", Status: "In-Progress", Location: "Japan" },
{ User: "Sam Smith", Status: "In-Progress", Location: "USA" },
]
我的初始化当前看起来像这样:
$('#targetChart').kendoChart({
dataSource: {
data: data.d.results,
group: {
field: "Location",
},
},
seriesDefaults: {
type: "donut",
},
series: [{
field: 'Id',
categoryField: 'Location',
}],
});
您可以轻松地转换数据。 将其按位置和过滤读入DataSource对象分组仅用于完成。 然后获取数据并为每个位置创建一个计数数组:
var pieData = [];
var respDS = new kendo.data.DataSource({
data: userResponse,
group: {
field: "Location",
},
filter: {
field: "Status",
operator: "eq",
value: "Completed" },
});
respDS.fetch(function(){
var view = respDS.view();
for (var i=0; i<view.length; i++){
var item = {};
item.Location = view[i].value;
item.Count = view[i].items.length;
pieData.push(item);
}
});
您最终得到:
[
{Location: "Japan", Count: 1},
{Location: "USA", Count: 2},
]
然后可以将其绑定到馅饼/甜甜圈。
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