饼图:
环境:Echarts 3.19 vs2013
实现方式:ajax+ashx+json
注意事项: 官网所需格式为 [{value:23,name:'xxxx' }] 请将key 的名字不要写错
具体代码,各位看官 请下移目光。
<!--请先引用文件--> <script src="../Scripts/jquery-1.8.2.min.js"></script> <script src="../Scripts/echarts/echarts.min.js"></script>
页面部分就设置一个div 就好了
<div><input type="button" id="btngo" value="Pie" /> </div> <div id="contanis" style="width:px;height:px"></div>
接下来就是js部分了 其实Echarts 跟HTML5中的 Canvans 还是有联系的 想知道的可以查资料哟
$("#btngo").click(function () { //这里用的是点击事件下面 当然这也是模仿你有条件查询的时候咯 var dom = document.getElementById('contanis'); var mycharts = echarts.init(dom); option = { title: { text: '部门人口比例', subtext: '测试数据', x: 'center' }, tooltip: { trigger: 'item', formatter: "{a} <br/>{b} : {c} ({d}%)" }, legend: { orient: 'vertical', left: 'left', data: [] }, series: [ { name: '2012年度', type: 'pie', radius: '55%', center: ['50%', '60%'], data: [], itemStyle: { emphasis: { shadowBlur: 10, shadowOffsetX: 0, shadowColor: 'rgba(0, 0, 0, 0.5)' //这怎么会有个.5呢? 看来还是要看看H5哟 } } } ] }; mycharts.setOption(option);
接下来就是 ajax部分了 动态加载数据才是根本的 数据固定多没意思,来干了这碗孟婆汤 来世就做UI设计尸
$.ajax({ type: "get", async: true, //异步请求(同步请求将会锁住浏览器,用户其他操作必须等待请求完成才可以执行) url: "../Handler/DepartmentHandler.ashx", data: {},//demo 没加条件 dataType: "json", //返回数据形式为json success: function (result) { for (var i = 0; i < result.length; i++) { name.push(result[i].name); } mycharts.setOption({ //加载数据图表 legend:{data:name }, series: [{ data:result }] }); }, error: function (errorMsg) { //请求失败时执行该函数 alert("图表请求数据失败!"); } });
ashx部分就简单多了 单纯的序列化数据
DataTable result = BLL.Department.GetDeptNumber(); List<object> list = new List<object>(); foreach (DataRow dr in result.Rows) { // 附上Echarts 所需的格式:[{value:335, name:'直接访问'}] Deart d = new Deart(); d.value = Convert.ToInt32(dr["number"]); //自己粗心 用values Echarts 不认 一直就是undefined d.name = dr["D_Name"].ToString(); list.Add(d); } JavaScriptSerializer jss = new JavaScriptSerializer(); string json = jss.Serialize(list); public class Deart //其实可以不用这么定义 自己保险让它出来的 value 值为int { public int value { get; set; } public string name { get; set; } }
附上效果图吧:
柱状图:
环境:Echarts 3.19 vs2013
实现方式:ajax+ashx+json
注意事项: 官网所需格式为:[5,6,7,9,34] 数组类型
具体代码,各位看官 请下移目光。
<!--js代码 --> <script src="../Scripts/jquery-1.8.2.min.js"></script> <script src="../Scripts/echarts/echarts.min.js"></script> <div> <%--按钮触发--%> <input type="button" id="btncanv" value="去吧 皮卡丘" /> </div> <%--声明一个DIV 用来装Canvas绘制的图片--%> <div id="contanis" style="width:1000px;height:800px" > <script type="text/javascript"> $("#btncanv").click(function () { //获取到绘制dom var dom = document.getElementById("contanis"); var myChart = echarts.init(dom); myChart.setOption({ title: { text: '异步数据加载示例' //图片标题 }, tooltip: {}, legend: { data: ['部门人口'] }, xAxis: { data: [] }, yAxis: {}, series: [{ name: '2015', type: 'bar',//可以更改为 line(折线) data: [] //此处给空 后面用ajax给他赋值 }] });
老规律 下面就是ajax 部分了 :
myChart.showLoading(); //数据加载完之前先显示一段简单的loading动画 var names = []; //类别数组(实际用来盛放X轴坐标值) var nums = []; //销量数组(实际用来盛放Y坐标值) $.ajax({ type: "post", async: true, //异步请求(同步请求将会锁住浏览器,用户其他操作必须等待请求完成才可以执行) url: "../Handler/DepartmentHandler.ashx", //请求发送到../Handler/DepartmentHandler处 data: {}, dataType: "json", //返回数据形式为json success: function (result) { //请求成功时执行该函数内容,result即为服务器返回的json对象 if (result) { for (var i = 0; i < result.length; i++) { names.push(result[i].name); //挨个取出类别并填入类别数组 } for (var i = 0; i < result.length; i++) { nums.push(result[i].values); //挨个取出销量并填入销量数组 } myChart.hideLoading(); //隐藏加载动画 myChart.setOption({ //加载数据图表 xAxis:{data: names}, series: [{ data: nums }] }); } }, error: function (errorMsg) { //请求失败时执行该函数 alert("图表请求数据失败!"); myChart.hideLoading(); } }) });
附上效果图吧:
其实option的设置是可以放在ajax里面的 一样会出效果 而且容易更看
就拿饼图来说吧 代码可以这么写啊
$.ajax({ type: "get", async: true, //异步请求(同步请求将会锁住浏览器,用户其他操作必须等待请求完成才可以执行) url: "../Handler/DepartmentHandler.ashx", data: {},//demo 没加条件 dataType: "json", //返回数据形式为json success: function (result) { for (var i = 0; i < result.length; i++) { name.push(result[i].name); } option = { title: { text: '部门人口比例', subtext: '测试数据', x: 'center' }, tooltip: { trigger: 'item', formatter: "{a} <br/>{b} : {c} ({d}%)" }, legend: { orient: 'vertical', left: 'left', data:name }, series: [ { name: '2012年度', type: 'pie', radius: '55%', center: ['50%', '60%'], data: result, itemStyle: { emphasis: { shadowBlur: 10, shadowOffsetX: 0, shadowColor: 'rgba(0, 0, 0, 0.5)' } } } ] }; }, error: function (errorMsg) { //请求失败时执行该函数 alert("图表请求数据失败!"); } });
如果你是想学习这个 作为一个吃过亏的菜鸟告诉你 先还是好好看看 官方的例子 然后理清思路在下手
以上所述是小编给大家介绍的基于Echarts 3.19 制作常用的图形(非静态)的相关知识,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对脚本之家网站的支持!

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