aspx后台传递Json到前台的两种接收方法推荐

第一种：前台接收

dataType: "json", success: function （data） {var varReceiver = data; }

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="echart2.aspx.cs" Inherits="RTC.echart2" %><！DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml"><head runat="server"><meta http-equiv="Content-Type" content="text/html; charset=utf-8"/><title> </title><！-- 引入 ECharts 文件 --><script src="scripts/echarts.common.min.js"></script><script src="scripts/jquery-1.10.2.min.js"></script><script src="scripts/json2.js"></script></head><body><form id="form1" runat="server"><！-- 为 ECharts 准备一个具备大小（宽高）的Dom --><div id="main" style="width:1000px;height:400px;"></div><script type="text/javascript">var varAxis;var varSeries;//var varRtcNO = $（"#txtHid"）.val（）;var varRtcNO = "35000002818";var jdata;var myChart = echarts.init（document.getElementById（"main"））;// 显示标题，图例和空的坐标轴myChart.setOption（{title: {text: "温度曲线图"},tooltip: {trigger: "axis",axisPointer: {animation: false},formatter: function （params） {return params[0].name + "<br />温度:" + params[0].value + "°C";}},legend: {data: ["温度"]},xAxis: {data: []},yAxis: {axisLabel: {formatter: "{value} °C"},min: 18,max:30},series: [{name: "温度",type: "line",smooth: true,data: []}]}）;// 异步加载数据$.ajax（{type: "post",url: "getrtchistorydata.ashx?rtcno=" + varRtcNO,dataType: "json",success: function （data） {var varReceiver = data;//var varReceiver = jQuery.parseJSON（data）;var varAxis=new Array（） ;var varSeries = new Array（varReceiver.Count[0].total）;for （var i = 0; i < varReceiver.Count[0].total; i++） {varAxis.push（varReceiver.Rows[i].RecordTime）;varSeries[i] = varReceiver.Rows[i].RoomTemp;}// 填入数据myChart.setOption（{xAxis: {data: varAxis},series: [{//根据名字对应到相应的系列name: "温度",data: varSeries}]}）;},error: function （XMLHttpRequest, textStatus, errorThrown） {alert（errorThrown）;}}）;</script></form></body></html>

第二种：前台接收

dataType: "text",success: function （data） {//var varReceiver = data;var varReceiver = jQuery.parseJSON（data）;。。。。。}

两者统一的后台一般处理程序ashx：

using System;using System.Collections.Generic;using System.Data;using System.Data.SqlClient;using System.Linq;using System.Web;namespace RTC{/// <summary>/// getrtchistorydata 的摘要说明/// </summary>public class getrtchistorydata : IHttpHandler{public void ProcessRequest（HttpContext context）{context.Response.ContentType = "text/plain";string strRTCNo = context.Request.QueryString["rtcno"].ToString（）;SqlConnection con = new SqlConnection（"server=192.168.0.222;uid=sa;pwd=hiwits;database=CeShi_QingDao;Max Pool Size=2048;"）;SqlCommand cmd = new SqlCommand（"select RtcNO,RoomTemp,InstallPlace,convert（varchar,RecordTime,120） as RecordTime,systime from RTCHistory where RtcNO="" + strRTCNo + "" order by InstallPlace,RecordTime", con）;SqlDataAdapter da = new SqlDataAdapter（cmd）;DataSet ds = new DataSet（）;da.Fill（ds）;string stbList = "";stbList = "{"Rows":[";foreach （DataRow dr in ds.Tables[0].Rows）{stbList = stbList + "{ "RecordTime":"" + dr[3].ToString（） + "",";stbList = stbList + " "RoomTemp":"" + dr[1].ToString（） + ""},";}stbList = stbList.Substring（0, stbList.Length - 1）;//去掉最后的一个逗号stbList = stbList + "],"; stbList = stbList + ""Count":[{"total":" + ds.Tables[0].Rows .Count+ "}]";//用来记录一共返回了几条数据记录stbList = stbList + "}";context.Response.Write（stbList.ToString（））;}public bool IsReusable{get{return false;}}public void RetrunHistoryData（）{}}}

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