Steema Central

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	private Database db = Database();

Code: Select all

public partial class _Default : System.Web.UI.Page 
{

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            FillChart();
						getDetailedData();
        }

        ChartSession();
        CheckZoom(WebChart1);
    }

    protected void FillChart()
    {
        Steema.TeeChart.Chart chart1 = WebChart1.Chart;
        Steema.TeeChart.Styles.Volume series1 = (Steema.TeeChart.Styles.Volume)chart1.Series[0];
        chart1.Tools.Add(new Steema.TeeChart.Tools.ZoomTool());
        ((Steema.TeeChart.Tools.ZoomTool)chart1.Tools[0]).ZoomPenColor = Color.OliveDrab;

        series1.XValues.DateTime = true;
        chart1.Axes.Bottom.Labels.DateTimeFormat = "MM/yyyy";
        chart1.Axes.Bottom.Labels.MultiLine = true;
        chart1.Panel.MarginBottom = 10;

        // Legend
        Steema.TeeChart.Legend legend = chart1.Legend;
        legend.ImageMode = Steema.TeeChart.Drawing.ImageMode.Stretch;

				series1.Clear();
				series1.DataSource = getSummaryData();				
				series1.XValues.DataMember = "ARRDATE";
				series1.YValues.DataMember = "ARRTIME";
				series1.LabelMember = "LABELS";

				series1.CheckDataSource(); 				
    }

    private DataTable getSummaryData()
    {
        DataTable myData = new DataTable ();

				DataColumn ARRDATE = new DataColumn("ARRDATE", Type.GetType("System.DateTime"));
				DataColumn ARRTIME = new DataColumn("ARRTIME", Type.GetType("System.Double"));
				DataColumn LABELS = new DataColumn("LABELS", Type.GetType("System.String"));

				myData.Columns.Add(ARRDATE);
				myData.Columns.Add(ARRTIME);
				myData.Columns.Add(LABELS);

				DataRow dataRow;
				DateTime myTime = DateTime.Now;

				for (int i = 0; i < 12000; i++)
				{
					dataRow = myData.NewRow();
					dataRow[ARRDATE] = myTime.AddDays(i);
					TimeSpan elapsedTime  = new TimeSpan(DateTime.Now.Ticks - myTime.Ticks);
					dataRow[ARRTIME] = elapsedTime.Ticks;
					dataRow[LABELS] = "Point number" + (i + 1).ToString();

					myData.Rows.Add(dataRow); 	
				}

				return myData;
    }


		private DataTable getDetailedData()
    {
			return getSummaryData();
    }


    protected void ChartSession()
    {
        Steema.TeeChart.Chart ch1 = WebChart1.Chart;
        MemoryStream tmpChart = new MemoryStream();
        if (Session["WebChart1"] == null)
        {
            //export Chart to a MemoryStream template
            ch1.Export.Template.Save(tmpChart);
            //save template to a Session variable
            Session.Add("WebChart1", tmpChart);
        }
        else
        {
            //retrieve the session stored Chart
            tmpChart = (MemoryStream)Session["WebChart1"];
            //set the Stream position to 0 as the last read/write
            //will have moved the position to the end of the stream
            tmpChart.Position = 0;
            //import saved Chart
            WebChart1.Chart.Import.Template.Load(tmpChart);


        }
    }

    private void CheckZoom(WebChart wChart)
    {
        ArrayList zoomedState = (ArrayList)Session[wChart.ID + "Zoomed"];
        if (wChart.Chart.Tools.Count > 0)
        {
            zoomedState = ((Steema.TeeChart.Tools.ZoomTool)wChart.Chart.Tools[0]).SetCurrentZoom(Request,
                zoomedState);
            if (zoomedState == null)
                Session.Remove(wChart.ID + "Zoomed");
            else
                Session.Add(wChart.ID + "Zoomed", zoomedState);
        }
    }
}