Highcharts usage simple example and asynchronous dynamic reading of data_javascript skills

Highcharts is a chart library written in pure JavaScript. It can easily and conveniently add interactive charts to web sites or web applications. It is free for personal study, personal websites and non-commercial use. The chart types supported by HighCharts include line charts, area charts, bar charts, pie charts, scatter charts and comprehensive charts.

Part 1: Load two JS libraries between the heads.

<script src="html/js/jquery.js"></script>
<script src="html/js/chart/highcharts.js"></script> 

You can download it from http://www.hcharts.cn/ . There are related tutorials and usage instructions.

If you are good at English, you can go to the official website: http://www.highcharts.com/

Part 2: JS Code

//定义一个Highcharts的变量，初始值为null
var oChart = null;
//定义oChart的布局环境
//布局环境组成：X轴、Y轴、数据显示、图标标题
var oOptions = { 
 //设置图表关联显示块和图形样式
 chart: { 
  renderTo: 'container', //设置显示的页面块
  //type:'line'    //设置显示的方式
  type: 'column'
 },
 //图标标题
 title: { 
  text: '图表展示范例', //设置标题
  //text: null, //设置null则不显示标题
 },
 //x轴
 xAxis: {
  title: {
   text: 'X 轴 标 题'
  },
  categories: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'] 
 },
 //y轴
 yAxis: {
  title: { text: 'Y 轴 标 题' }, //设置Y轴标题关闭
 },
 //数据列
 series: [{
  data:[120,360,560,60,360,160,40,360,60,230,230,300]
  }] 
}; 
$(document).ready(function(){
 oChart = new Highcharts.Chart(oOptions);
 //异步添加第2条数据列
 LoadSerie_Ajax();
}); 
//异步读取数据并加载到图表
function LoadSerie_Ajax() { 
  oChart.showLoading(); 
  $.ajax({ 
   url : 'ajax/get_value.aspx',
   type : 'POST',
   dataType : 'json',
   async : false, //同步处理后面才能处理新添加的series
   contentType: "application/x-www-form-urlencoded; charset=utf-8", 
   success : function(rntData){
     var oSeries = {
     name: "第二条",
     data: rntData.rows1
    };
    oChart.addSeries(oSeries);
   }
  });
  oChart.hideLoading(); 
} 

Part 3: C# Code

Response.Clear();
Response.Write("{\"rows1\":[10,20,30,40,50,200,70,100,90,200,100,60]}");
Response.End(); 
 输出的数据格式为 {"rows1":[10,20,30,40,50,200,70,100,90,200,100,60]} 
 多条的数据格式为 {"rows1":[10,20,30,40,50,200,70,100,90,200,100,60],"rows2":[10,20,30,40,50,200,70,100,90,200,100,60]} 

Part 4: HTML page code

<div id="container" style="min-width:400px;width:1200px;height:400px;"></div>

Let me share with you a piece of code about highcharts asynchronously obtaining data

Page asynchronous code

$(function () {
   var chart_validatestatics;
   $(document).ready(function () {
    var options_validatestatics = {
     chart: {
      renderTo: 'container_validatestatics',
      type: 'column'
     },
     title: {
      text: '验票分析'
     },
     subtitle: {
      text: 'tourol.cn'
     },
     xAxis: {
    },
    yAxis: {
     title: {
      text: '人数'
     }
    },
    plotOptions: {
     bar: {
      dataLabels: {
       enabled: true
      }
     }
    },
    tooltip: {
     formatter: function () {
      return '<b>' + this.x + '</b><br/>' + this.series.name + ': ' + this.y + '人';
     }
    },
    credits: {
     enabled: false
    },
    series: [{
     name: "验票用户",
     width: 3
    }]
   }
   $.get("/ajaxhandler/dataupdate.ashx&#63;operate_type=validatestatics", function (data) {
    var xatrnames = [];
    var yvalidators = [];
    for (var i = 0; i < data.rows.length; i++) {
     xatrnames.push([
       data.rows[i].atrname
      ]);
     yvalidators.push([
       data.rows[i].atrname,
       parseInt(data.rows[i].nums)
      ]);
    }
    alert(xatrnames + yvalidators);
    options_validatestatics.xAxis.categories = xatrnames
    options_validatestatics.series[0].data = yvalidators;
    chart_validatestatics = new Highcharts.Chart(options_validatestatics);
   });
  });
 }); 

What should be noted here is: after the x-axis array is defined, when defining the y-axis data, the values ​​corresponding to the x-axis must also be pushed into the array, otherwise it will not be displayed

Correspondingly, in ajaxhandler, just splice the string and return it

string json = "{\"rows\":[";
  for (int i = 0; i < datas.Rows.Count; i++)
  {
   json += "{\"atrname\":\"" + datas.Rows[i]["name"] + "\",\"nums\":\"" + datas.Rows[i]["nums"] + "\"},";
  }
  json = json.TrimEnd(',');
  json += "]}";
  context.Response.Write(json);
  context.Response.Flush();
  context.Response.End();