Steema Central

Code: Select all

    public partial class Form1 : Form
    {
        private const int MAX_DATA = 10;

        public Form1()
        {
            InitializeComponent();
            tChart1.Text = "My Chart Text";
            tChart1.Aspect.View3D = false;

            FastLine fl1 = new FastLine();
            fl1.Title = "My Line 1";
            fl1.Color = Color.Blue;
            tChart1.Series.Add(fl1);
            tChart1.Series[0].Clear();

            tChart1.Axes.Bottom.AutomaticMinimum = false;
            tChart1.Axes.Bottom.AutomaticMaximum = false;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            timer1.Start();
        }

        private void OnTimerTick(object sender, EventArgs e)
        {
            DateTime dt = DateTime.Now;
            tChart1.Series[0].Add(dt, tChart1.Series[0].XValues.Count + 1);
            if (tChart1.Series[0].XValues.Count > MAX_DATA)
            {
                tChart1.Series[0].XValues.RemoveAt(0);
                tChart1.Series[0].YValues.RemoveAt(0);
            }
            UpdateTimeAxis(dt);
        }

        private void button2_Click(object sender, EventArgs e)
        {
            timer1.Stop();
        }

        private void UpdateTimeAxis(DateTime maxTime)
        {
            DateTime minScrollDateTime = maxTime.Subtract(new TimeSpan(0, 0, 10));
            tChart1.Axes.Bottom.Minimum = minScrollDateTime.ToOADate();
            tChart1.Axes.Bottom.Maximum = maxTime.ToOADate();
        }
    }

Code: Select all

        private void ReFormatXTimeAxis()
        {
            Series longestSeries = tChart1.Series[0];
            foreach (Series series in tChart1.Series)
            {
                if (series.XValues.Count > longestSeries.XValues.Count)
                    longestSeries = series;

                series.Labels.Clear();
            }
            DateTime firstValue = longestSeries.XValues.AsDateTime(0);
            for (int i = 0; i < longestSeries.XValues.Count; i++)
            {
                    TimeSpan span = longestSeries.XValues.AsDateTime(i).Subtract(firstValue);
                    longestSeries.Labels.Add(span.ToString());
            }
        }