我正在尝试将ajax请求发布到节点js中的server.js脚本。然后，脚本将数据从ajax请求传递给存储过程，并且应该将结果返回给ajax函数。但由于某种原因，我在调试我的ajax函数时遇到了一个未定义的错误。我能做错什么？
plain.ejs
<html>
<head>
<script src="http://code.jquery.com/jquery-1.11.3.min.js" ></script>
<script src="http://code.highcharts.com/highcharts.js" ></script>
<script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
</head>
<body>
<div id="container1" style="width:100%; height:400px;"></div>
<div id ="container2" style="height:20px;"></div>
<div id ="container3" style="width:100%; height:400px;"></div>
<script type="text/javascript">
$(document).ready(function () {
var bankid = [ 57, 9912, 9905, 16, 58 ];
var country = ["KENYA", "KENYA", "KENYA", "UGANDA", "UGANDA"];
var counter = 0;
var merchantname = [];
var successtranscs = [];
var failedtranscs = [];
var servicetranscs = [];
var bankname;
var rows =<%-JSON.stringify(Resultset)%>
function initfunc() {
$.ajax({
type: "POST",
contentType: "application/json; charset=utf-8",
url: "/dashboard",
data: JSON.stringify({country: country[counter], bankid: bankid[counter]}),
dataType: "json",
success: function (Result) {
Result = Result.d;
console.log("result" +Result);
var data = [];
var merchantname = [];
var successtranscs = [];
var failedtranscs = [];
var servicetranscs = [];
var bankname;
for (var i in Result) {
merchantname.push(Result[i].merchant_name);
successtranscs.push(Result[i].success_transcs);
failedtranscs.push(Result[i].failed_transcs);
servicetranscs.push(Result[i].service_transcs);
bankname = Result[i].bankname;
}
StackedChart(bankname, merchantname, successtranscs, failedtranscs, servicetranscs);
merchantname = [];
successtranscs = [];
failedtranscs = [];
servicetranscs = [];
if (counter == country.length - 1) {
counter = -1;
counter++;
}
else {
counter++;
}
},
error: function (Result) {
console.log(Result.d);
}
});
}
initfunc();
function callfunc() {
$.ajax({
type: "POST",
contentType: "application/json; charset=utf-8",
url: "/dashboard",
data: JSON.stringify({country: country[counter], bankid: bankid[counter]}),
dataType: "json",
success: function (Result) {
Result = Result.d;
console.log("result" +Result);
var data = [];
var merchantname = [];
var successtranscs = [];
var failedtranscs = [];
var servicetranscs = [];
var bankname;
for (var i in Result) {
merchantname.push(Result[i].merchant_name);
successtranscs.push(Result[i].success_transcs);
failedtranscs.push(Result[i].failed_transcs);
servicetranscs.push(Result[i].service_transcs);
bankname = Result[i].bankname;
}
StackedChart(bankname, merchantname, successtranscs, failedtranscs, servicetranscs);
merchantname = [];
successtranscs = [];
failedtranscs = [];
servicetranscs = [];
if (counter == country.length - 1) {
counter = -1;
counter++;
}
else {
counter++;
}
},
error: function (Result) {
console.log(Result.d);//it keeps going to the error //function
}
});
}
function StackedChart(bank_name,merch_name, succ_val, fail_val, ser_val) {
var myChart = Highcharts.chart('container1', {
chart: {
type: 'column'
},
title: {
text: bank_name
},
xAxis: {
categories: merch_name
},
yAxis: {
min: 0,
title: {
text: 'TransactionStatus'
},
stackLabels: {
enabled: true,
style: {
fontWeight: 'bold',
color: (Highcharts.theme && Highcharts.theme.textColor) || 'gray'
}
}
},
legend: {
align: 'right',
x: -30,
verticalAlign: 'top',
y: 25,
floating: true,
backgroundColor: (Highcharts.theme && Highcharts.theme.background2) || 'white',
borderColor: '#CCC',
borderWidth: 1,
shadow: false
},
tooltip: {
headerFormat: '<b>{point.x}</b><br/>',
pointFormat: '{series.name}: {point.y}<br/>Total: {point.stackTotal}'
},
plotOptions: {
column: {
stacking: 'normal',
dataLabels: {
enabled: true,
color: (Highcharts.theme && Highcharts.theme.dataLabelsColor) || 'white'
}
}
},
series: [{
name: 'Servicefailure',
data: ser_val
}, {
name: 'Failure',
data: fail_val
}, {
name: 'Success',
data: succ_val
}]
});
}
setInterval(callfunc, 2000);
});
</script>
</body>
</html>
server.js -
var express = require('express');
var cnn = require('./DbConnection.js');
var bodyParser = require('body-parser');
require('highcharts');
var app = express();
app.use(express.bodyParser());
app.use(bodyParser.json()); // for parsing application/json
app.use(bodyParser.urlencoded({ extended: true })); //
app.engine('html', require('ejs').renderFile);
dirname = "C:/Users/user/WebstormProjects/untitled/public";
require("jsdom").env("", function(err, window) {
if (err) {
console.error(err);
return;
}
var $ = require("jquery")(window);
});
app.listen(3000, function () {
console.log('Example app listening on port 3000!')
});
app.get('/', function (req, res) {
var obj;
cnn.TransactionInfo("KENYA","57", function (err, result) {
// process result here
console.log(result.length);
var resultset = {"Result":result};
obj = { "title":"fruit consumption", "name":"fruit eaten"};
res.render("plain.ejs",{Resultset:resultset});
});
});
app.post('/dashboard', function (req, res) {
cnn.TransactionInfo(req.body.country,req.body.bankid, function (err, result) {
var resultset = {"Result":result};
res.render("plain.ejs",{Resultset:resultset});
});
});
答案 0 :(得分：0)
通过指定dataType : "json"，您告诉jQuery它应该期望服务器返回JSON数据。但是，您的Express处理程序正在发回HTML：
res.render("plain.ejs",{Resultset:resultset});
因此，错误可能是jQuery无法解码响应。
尝试发回JSON响应：
res.json({ Resultset : resultset });