private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
// find URL of provided category
String id = comboBox1.SelectedItem.ToString();
String xPath = "//div[@id='txtStockListMenu']/table[@id='" +
"STOCK_LIST_ALL']/tr/td/a[text()='" + id + "']";
String index = "https://goodinfo.tw/StockInfo/";
String URL = index + HAP_doc.DocumentNode.SelectSingleNode(xPath)
.Attributes["href"].Value;
// Go to that URL and get HTML
WebClient webClient = new WebClient();
webClient.Headers.Add("user-agent",
"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:61.0)" +
" Gecko/20100101");
Stream stream = webClient.OpenRead(URL);
Encoding encode = System.Text.Encoding.GetEncoding("utf-8");
StreamReader streamReader = new StreamReader(stream, encode);
String str = streamReader.ReadToEnd();
HAP_doc.LoadHtml(str);
stream.Close();
streamReader.Close();
webClient.Dispose();
// iterate nodes and load it to comboBox2
String xPath2 = "//div[@id='divStockList']" +
"/table[@class='solid_1_padding_3_1_tbl']" +
"/tr";
var nodes = HAP_doc.DocumentNode.SelectNodes(xPath2);
comboBox2.Items.Clear();
foreach (var node in nodes)
{
String stkId = node.SelectSingleNode("./td[1]//a").InnerText;
String stkName = node.SelectSingleNode("./td[2]//a").InnerText;
comboBox2.Items.Add(stkId + " " + stkName);
}
GC.Collect();
}
private void comboBox2_SelectedIndexChanged(object sender, EventArgs e)
{
// Change big label
label_main_info.Text = "正在分析...";
label_instruction.Text = comboBox2.SelectedItem.ToString();
// Find URL of provided id
String xPath = "//div[@id='divStockList']" +
"/table[@class='solid_1_padding_3_1_tbl']" +
"/tr";
var nodes = HAP_doc.DocumentNode.SelectNodes(xPath);
String subURL = "";
foreach (var node in nodes)
{
String specifiedStr = comboBox2.SelectedItem.ToString().Remove(4);
if (node.SelectSingleNode("./td[1]//a").InnerText == specifiedStr)
{
var node2 = node.SelectSingleNode("./td[17]//a");
subURL = node2.Attributes["href"].Value.ToString();
break;
}
}
String index = "https://goodinfo.tw/StockInfo/";
String URL = index + subURL;
// Go to that URL and get one yeardata-HTML
// (using Selenium)
IWebDriver driver = new FirefoxDriver();
driver.Navigate().GoToUrl(URL);
int count1 = driver.PageSource.Length;
IWebElement select = driver.FindElement(By.Id("selK_ChartPeriod"));
IList <IWebElement> options =
select.FindElements(By.TagName("option"));
foreach (var option in options)
{
if (option.Text == "一年")
{
option.Click();
break;
}
}
while (true)
{
System.Threading.Thread.Sleep(1000);
int count2 = driver.PageSource.Length;
if (count1 != count2)
{
break;
}
}
HAP_doc.LoadHtml(driver.PageSource);
// Iterate nodes and load data to candlestick chart
String xPath2 = "//div[@id='divPriceDetail']" +
"/table[@class='solid_1_padding_3_0_tbl']" +
"/tbody/tr";
var nodes2 = HAP_doc.DocumentNode.SelectNodes(xPath2);
chart1.Series[0].Points.Clear();
String prevM = "00";
String curM = "00";
int trackYear = DateTime.Now.Year;
foreach (var node in nodes2)
{
String date = node.SelectSingleNode("./td[1]/nobr").InnerText;
prevM = curM;
curM = date.Remove(2);
if (prevM == "01" && curM == "12")
{
trackYear -= 1;
}
Object dateObj = Convert.ToDateTime(trackYear + "/" + date);
String highStr = node.SelectSingleNode("./td[3]/nobr").InnerText;
float high = Convert.ToSingle(highStr);
String lowStr = node.SelectSingleNode("./td[4]/nobr").InnerText;
float low = Convert.ToSingle(lowStr);
String openStr = node.SelectSingleNode("./td[2]/nobr").InnerText;
float open = Convert.ToSingle(openStr);
String closeStr = node.SelectSingleNode("./td[5]/nobr").InnerText;
float close = Convert.ToSingle(closeStr);
chart1.Series[0].Points.AddXY(dateObj, low, high, open, close);
}
// Calculate K-line of 20 day
var points = chart1.Series[0].Points;
double sum = 0;
for (var i = points.Count - 1; i > points.Count - 21; i--)
{
double y = chart1.Series[0].Points[i].GetValueByName("Y4");
sum += y;
}
for (var i = points.Count - 21; i >= 0; i--)
{
double currentY = chart1.Series[0].Points[i].GetValueByName("Y4");
double removeY = chart1.Series[0].Points[i + 20].GetValueByName("Y4");
sum = sum + currentY - removeY;
double average = sum / 20;
var date = chart1.Series[0].Points[i].XValue;
var date2 = DateTime.FromOADate(date);
chart1.Series[1].Points.AddXY(date2, average);
}
// Draw an area from k-line which covers 0.95 of points
draw_kline_extendedArea(0.95);
// Adjust y-axis value boundary
double maxPrice = chart1.Series[0].Points.FindMaxByValue("Y2")
.GetValueByName("Y2");
double maxAverge = chart1.Series[1].Points.FindMaxByValue("Y")
.GetValueByName("Y");
double max = (maxPrice >= maxAverge) ? maxPrice : maxAverge;
chart1.ChartAreas[0].AxisY.Maximum = (int)(max + 2);
double minPrice = chart1.Series[0].Points.FindMinByValue("Y1")
.GetValueByName("Y1");
double minAverge = chart1.Series[1].Points.FindMinByValue("Y")
.GetValueByName("Y");
double min = (minPrice <= minAverge) ? minPrice : minAverge;
chart1.ChartAreas[0].AxisY.Minimum = (int)(min - 2);
}