我的JSON config.json ：
[
{
"names":"Steam",
"count": 1,
},
{
"names":"game",
"count": 2,
}
]
我需要在c＃中更新数组中count的属性。
我尝试过
JObject objectproperty = JObject.Parse(File.ReadAllText(@"config.json"));
但这给了我错误
Newtonsoft.Json.JsonReaderException: "Error reading JObject from JsonReader. Current JsonReader item is not an object: StartArray. Path '', line 1, position 1."
答案 0 :(得分：0)
您可以使用JToken
假设您的JSON为：
（注意，我必须删除一些<!DOCTYPE html>
<html>
<body>
<script type = "text/javascript" src ="https://canvasjs.com/assets/script/canvasjs.min.js" > </script>
<h2> Return of Investment Calculator </h2>
<label> Initial Investment: </label> <input id="amount" value="500" min="1">
<label> Interest( % ): </label> <input id="ratePerMonth" value="3" min="1.0" Max="100.0">
<label> Months: </label> <input id="numberOfMonths" value="3">
<button onclick = "calculate()" > Calculate </button>
<p id="display"> </p>
<script type = "text/javascript" >
function calculate() {
//Beginning of user input values
amount = document.getElementById("amount").value; //obtain initial investment
ratePerMonth = document.getElementById("ratePerMonth").value; // rate increase per month
numberOfMonths = document.getElementById("numberOfMonths").value; // no. of months
//End of user input values
// Calculator Down Below
var investment = [];
var text = "";
var month = new Date().getMonth();
var monthHolder = Number(month + 1);
var total = amount;
var additionalRate = 0;
for (var i = -1; i < numberOfMonths; i++) { //Start of loop for compound
switch (monthHolder) { //switching getMonth function to literal strings
case 1:
monthDisplay = "January";
break;
case 2:
monthDisplay = "February";
break;
case 3:
monthDisplay = "March";
break;
case 4:
monthDisplay = "April";
break;
case 5:
monthDisplay = "May";
break;
case 6:
monthDisplay = "June";
break;
case 7:
monthDisplay = "July";
break;
case 8:
monthDisplay = "August";
break;
case 9:
monthDisplay = "September";
break;
case 10:
monthDisplay = "October";
break;
case 11:
monthDisplay = "November";
break;
case 12:
monthDisplay = "December";
};
text += "Current Amount " + parseFloat(total).toFixed(2) + "Rate: " + ratePerMonth + "% Month: " + monthDisplay + "<br>";
//inserting data
investment.push([
monthDisplay,total
]);
//end of data insert
additionalRate = total * ratePerMonth / 100;
total = Number(additionalRate) + Number(total);
if (monthHolder < 12) {
monthHolder++;
} else {
monthHolder = 1;
}
}
// chartInvestment.render();
document.getElementById("display").innerHTML = text;
alert(investment[2][1]);
var chart = new CanvasJS.Chart("chartContainer", {
title: {
text: "Investment Chart"
},
data: [{
type: "line",
datapoints: investment
}]
});
chart.render();
}
</script>
<div id = "chartContainer" style = "height: 300px; width: 100%;" ></div>
</body>
</html>
）
,您可以使用此：
[
{
"names":"Steam",
"count": 1
},
{
"names":"game",
"count": 2
}
]