Использование ZedGraph для отображения цены с течением времени.Очевидно, что я делаю что-то не так при настройке графика.Есть идеи?
Вот код, который я делаю
private void Form1_Load(object sender, EventArgs e)
{
myPane = zgc.GraphPane;
// Set the Titles
myPane.Title.Text = "Forex";
myPane.XAxis.Title.Text = "Date/Time";
myPane.YAxis.Title.Text = "Price";
myPane.XAxis.Type = AxisType.Date;
myPane.XAxis.Scale.MajorUnit = DateUnit.Minute;
myPane.XAxis.Scale.Format = "T";
}
private void QueryDB(ref PointPairList lst)
{
if (connection == null)
connection = new MySql.Data.MySqlClient.MySqlConnection(connStr);
try
{
if (connection.State == ConnectionState.Closed)
connection.Open();
string pair = cboPair.Text;
string sql = "SELECT bid, ask, price_datetime FROM forex.prices WHERE pair='" + pair + "' and price_datetime > (NOW() - INTERVAL 1 MINUTE) ORDER BY price_datetime desc;";
MySqlCommand cmd = new MySqlCommand(sql, connection);
MySqlDataReader rdr = cmd.ExecuteReader();
while (rdr.Read())
{
DateTime tm = rdr.GetDateTime("price_datetime");
double bid = rdr.GetDouble("bid");
lst.Add(tm.ToOADate(), bid);
}
rdr.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
finally
{
}
}
private void cmdRefresh_Click(object sender, EventArgs e)
{
PointPairList bidPrice = new PointPairList();
QueryDB(ref bidPrice);
LineItem myCurve = myPane.AddCurve("Bid", bidPrice, Color.Red);
myPane.YAxis.Scale.MinAuto = true;
myPane.YAxis.Scale.MaxAuto = true;
myPane.XAxis.Scale.MinAuto = true;
myPane.XAxis.Scale.MaxAuto = true;
zgc.AxisChange();
// just points not lines. bigger points and colored based on
// buy or sell. red for sell, green for buy
//PointPairList tradeEntries = new PointPairList();
}