[GitHub] wqqwqq666 opened a new issue #8877: echarts 4.0 动态设置dataset DataSource

[GitBox <gi...@apache.org>]

wqqwqq666 opened a new issue #8877: echarts 4.0 动态设置dataset DataSource
URL: https://github.com/apache/incubator-echarts/issues/8877
 
 
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   ### 根据Ajax 请求得到dataset 中source的数据源
   
   `前端代码：                   
   ```
               $.ajax({
                   type: "post",
                   url: "/Test/eChartsData",
                   dataType: "json",
                   async: false, //同步执行
                   success: function (result) {
                       //var test = $.parseJSON(result.data);
                       myChart.setOption({
                           legend: {},
                           tooltip: {},
                           dataset: {
                               dimensions: ['WorkDate', 'OutputByStaff'],
                               source: [result]
                               //dimensions: ['product', '2015'],
                               //source: [
                               //    { product: 'Matcha Latte', '2015': 43.3, '2016': 85.8, '2017': 93.7 },
                               //    { product: 'Milk Tea', '2015': 83.1, '2016': 73.4, '2017': 55.1 },
                               //    { product: 'Cheese Cocoa', '2015': 86.4, '2016': 65.2, '2017': 82.5 },
                               //    { product: 'Walnut Brownie', '2015': 72.4, '2016': 53.9, '2017': 39.1 }
                               //]
                           },
                           grid: { containLabel: true },
                           xAxis: { type: 'category' },
                           yAxis: {},
                           series: [
                               {
                                   datasetIndex: 0,
                                   type: 'bar',
                                   //encode: {
                                   //    // 将 "amount" 列映射到 X 轴。
                                   //    x: 'WorkDate',
                                   //    // 将 "product" 列映射到 Y 轴。
                                   //    y: 'OutputByStaff'
                                   //}
                               }
                           ]
                       });
   
                       var test3 = myChart.getOption();
                       //test3.dataset.source = test;
                       //test3.dataset.dimensions = ['WorkDate', 'OutputByStaff'];
                       //test3.series[0].encode.x = 'WorkDate';
                       // test3.series[0].encode.y = 'OutputByStaff';
                       myChart.setOption(test3);
                   },
                   error: function (errorMsg) {
                       //alert(errorMsg);
                   }
               });
   
   ```
   如果采用官网的静态数据源显示数据没有问题，我已经注释了，但是从控制器获取到的Json 数组放到source里面 图表就不显示。
   这是后台返回的Json 数组，.NET:
   ```
               DataTable tb1 = ds.Tables[0];
               List<object> list = new List<object>();
               foreach (DataRow dr in tb1.Rows)
               {
                   var obj = new { WorkDate = dr["WorkDate"], OutputByStaff = dr["OutputByStaff"] };
                   list.Add(obj);
               }
               return Json(list, JsonRequestBehavior.AllowGet);
   ```
   Ajax中result返回值是一个Json数组，就是不显示，我以前都是用这个方法用在echarts 3.x 上，没有任何问题。求帮忙，dataset虽方便，不会用太。。。
   
   
   

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