回答編集履歴
1
見直しキャンペーン中
answer
CHANGED
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@@ -1,62 +1,62 @@
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jsonの外側の部分（"quotes"）も作れば、`JsonConvert.DeserializeObject`一発でデシリアライズできます。
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-
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Listと個々のPairがごっちゃになっているようです。
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4
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ローカル変数（var pair1）はメソッドを抜けたら消えてしまいます。
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```
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Windows.Forms;
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using Newtonsoft.Json;
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-
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namespace Questions237472
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{
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public partial class Form1 : Form
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{
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private List<Pair> pairs;
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public Form1()
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{
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InitializeComponent();
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button1.Text = "USD/JPY";
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}
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private void Form1_Load(object sender, EventArgs e)
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{
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var fileUrl = @"https://www.gaitameonline.com/rateaj/getrate";
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var root = JsonConvert.DeserializeObject<Root>(DownloadString(fileUrl));
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pairs = root.quotes;
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}
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private void button1_Click(object sender, EventArgs e)
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{
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var pair1 = pairs.First(x => x.currencyPairCode == "USDJPY");
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textBox1.AppendText("高値は" + pair1.high + "です");
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}
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private string DownloadString(string url)
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{
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using(var webClient = new System.Net.WebClient())
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{
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return webClient.DownloadString(url);
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}
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}
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private class Root
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{
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public List<Pair> quotes { get; set; }
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}
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private class Pair
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{
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public double high { get; set; }
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public double open { get; set; }
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public double bid { get; set; }
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public string currencyPairCode { get; set; }
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public double ask { get; set; }
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public double low { get; set; }
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}
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}
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}
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1
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+
jsonの外側の部分（`"quotes"`）も作れば、`JsonConvert.DeserializeObject`一発でデシリアライズできます。
|
|
2
|
+
|
|
3
|
+
`List`と個々の`Pair`がごっちゃになっているようです。
|
|
4
|
+
ローカル変数（`var pair1`）はメソッドを抜けたら消えてしまいます。
|
|
5
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+
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6
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+
```cs
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7
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+
using System;
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|
8
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+
using System.Collections.Generic;
|
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9
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+
using System.Linq;
|
|
10
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+
using System.Windows.Forms;
|
|
11
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+
using Newtonsoft.Json;
|
|
12
|
+
|
|
13
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+
namespace Questions237472
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14
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+
{
|
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15
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+
public partial class Form1 : Form
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16
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+
{
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17
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+
private List<Pair> pairs;
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18
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+
|
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19
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+
public Form1()
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20
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{
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21
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InitializeComponent();
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22
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button1.Text = "USD/JPY";
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23
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}
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24
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+
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25
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private void Form1_Load(object sender, EventArgs e)
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26
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{
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27
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var fileUrl = @"https://www.gaitameonline.com/rateaj/getrate";
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28
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var root = JsonConvert.DeserializeObject<Root>(DownloadString(fileUrl));
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29
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pairs = root.quotes;
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30
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}
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31
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+
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32
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private void button1_Click(object sender, EventArgs e)
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33
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{
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34
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var pair1 = pairs.First(x => x.currencyPairCode == "USDJPY");
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35
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textBox1.AppendText("高値は" + pair1.high + "です");
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36
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}
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37
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+
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38
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private string DownloadString(string url)
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39
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{
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40
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using(var webClient = new System.Net.WebClient())
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41
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{
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42
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return webClient.DownloadString(url);
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43
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}
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44
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}
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45
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+
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46
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+
private class Root
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47
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+
{
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48
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+
public List<Pair> quotes { get; set; }
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49
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+
}
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|
50
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+
|
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51
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+
private class Pair
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52
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{
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53
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public double high { get; set; }
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54
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+
public double open { get; set; }
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55
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+
public double bid { get; set; }
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56
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public string currencyPairCode { get; set; }
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57
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+
public double ask { get; set; }
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58
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+
public double low { get; set; }
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59
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}
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60
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}
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61
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}
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62
62
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```
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