Steema Central

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	protected void Page_Load(object sender, EventArgs e)
	{
		Steema.TeeChart.Chart ch1 = WebChart1.Chart;

		if (Session["ch1"] == null)
		{
			//setup Chart
			ch1.Aspect.View3D = false;

			Steema.TeeChart.Styles.Line line1 = new Steema.TeeChart.Styles.Line(ch1);
			line1.FillSampleValues(100);

			ExportChart(ch1);
		}
		else
		{
			MemoryStream tmpChart = new MemoryStream();

			//retrieve the session stored Chart
			tmpChart = (MemoryStream)Session["ch1"];
			//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
			ch1.Import.Template.Load(tmpChart);
		}
	}

	private void ExportChart(Steema.TeeChart.Chart ch1)
	{
		MemoryStream tmpChart = new MemoryStream();

		//export Chart to a MemoryStream template
		ch1.Export.Template.Save(tmpChart);
		//save template to a Session variable
		Session.Add("ch1", tmpChart);
	}

	protected void TextBox1_TextChanged(object sender, EventArgs e)
	{
		if (CheckBox1.Checked)
		{
			if (TextBox1.Text.Length > 0)
			{
				Steema.TeeChart.Chart ch1 = WebChart1.Chart;	

				int percent = Convert.ToInt32(TextBox1.Text);
				ch1.Axes.Left.Automatic = true;
				ch1.Axes.Right.Automatic = true;
				ch1.Axes.Bottom.Automatic = true;

				System.Drawing.Bitmap bmp = ch1.Bitmap((int)WebChart1.Width.Value, (int)WebChart1.Height.Value);
				WebChart1.Chart.Zoom.ZoomPercent(percent);

				ExportChart(WebChart1.Chart);
			}
		} 
	}

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	protected void Page_Load(object sender, EventArgs e)
	{
		Steema.TeeChart.Chart ch1 = WebChart1.Chart;
		MemoryStream tmpChart = new MemoryStream();

		if (Session["ch1"] == null)
		{
			//setup Chart
			ch1.Aspect.View3D = false;

			if (ch1.Series.Count < 1)
				ch1.Series.Add(new Steema.TeeChart.Styles.Points());

			ch1.Series[0].FillSampleValues(36);
			//export Chart to a MemoryStream template
			ch1.Export.Template.Save(tmpChart);
			//save template to a Session variable
			Session.Add("ch1", tmpChart);
		}
		else
		{
			//retrieve the session stored Chart
			tmpChart = (MemoryStream)Session["ch1"];
			//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);

			//check whether zoom request is being sent
			CheckZoom(WebChart1);

			Bitmap bmp = WebChart1.Chart.Bitmap((int)WebChart1.Width.Value, (int)WebChart1.Height.Value);
			bool noPoints = true;

			for (int x = WebChart1.Chart.Axes.Bottom.IStartPos; x <= WebChart1.Chart.Axes.Bottom.IEndPos; x++)
			{
				for (int y = WebChart1.Chart.Axes.Left.IStartPos; y <= WebChart1.Chart.Axes.Left.IEndPos; y++)
				{
					foreach (Steema.TeeChart.Styles.Series s in WebChart1.Chart.Series)
					{
						if (s.Clicked(x, y) != -1)
						{
							noPoints = false;
							break;
						}
					}

					if (!noPoints) break;
				}
				if (!noPoints) break;
			}

			if (noPoints)
			{
				WebChart1.Chart.Axes.Left.Automatic = true;
				WebChart1.Chart.Axes.Bottom.Automatic = true;
			}

		}
	}

	private void CheckZoom(Steema.TeeChart.Web.WebChart wChart)
	{
		ArrayList zoomedState = (ArrayList)Session[wChart.ID + "Zoomed"];
		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);
	}

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System.Drawing.Bitmap bmp = webChart.Chart.Bitmap();

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				System.Drawing.Bitmap bmp = ch1.Bitmap((int)WebChart1.Width.Value, (int)WebChart1.Height.Value);

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using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.IO;
using System.Text;

using Steema.TeeChart.Web;
using Steema.TeeChart.Styles;


namespace WebChartWaveform
{
    /// <summary>
    /// Summary description for WebForm1.
    /// </summary>
    public partial class WebAppZoomChart1 : System.Web.UI.Page
    {
        protected Steema.TeeChart.Tools.ZoomTool zoomTool1;
        protected Steema.TeeChart.Styles.Points points1;
        protected Steema.TeeChart.Styles.Points points2;
        protected Steema.TeeChart.Tools.ZoomTool zoomTool2;

        protected void Page_Load(object sender, System.EventArgs e)
        {
          Steema.TeeChart.Chart ch1 = WebChart1.Chart; 

          if (Session["ch1"] == null) 
          { 
             //setup Chart 
             ch1.Aspect.View3D = false; 

             Steema.TeeChart.Styles.Line line1 = new Steema.TeeChart.Styles.Line(ch1); 
             line1.FillSampleValues(100);
             line1.Color = Color.Blue;

             ExportChart(ch1); 
          } 
          else 
          { 
             MemoryStream tmpChart = new MemoryStream(); 

             //retrieve the session stored Chart 
             tmpChart = (MemoryStream)Session["ch1"]; 
             //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 
             ch1.Import.Template.Load(tmpChart);

            //check whether zoom request is being sent
             CheckZoom(WebChart1);

          } 
        } 

   private void ExportChart(Steema.TeeChart.Chart ch1) 
   { 
      MemoryStream tmpChart = new MemoryStream(); 

      //export Chart to a MemoryStream template 
      ch1.Export.Template.Save(tmpChart); 
      //save template to a Session variable 
      Session.Add("ch1", tmpChart); 
   } 

        private void CheckZoom(WebChart wChart)
        {
            ArrayList zoomedState = (ArrayList)Session[wChart.ID + "Zoomed"];
            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);
            ExportChart(wChart.Chart);

        }

        #region Web Form Designer generated code
        override protected void OnInit(EventArgs e)
        {
            //
            // CODEGEN: This call is required by the ASP.NET Web Form Designer.
            //
            InitializeComponent();
            base.OnInit(e);

            //			//Associate the Chart's Hotspot event with function
            //			((Steema.TeeChart.Tools.SeriesHotspot)(WebChart1.Chart.Tools[0])).GetHTMLMap += 
            //				new Steema.TeeChart.Tools.SeriesHotspotEventHandler(hotspot1_GetHTMLMap);
            //
            //			Steema.TeeChart.Tools.SeriesHotspot h1=((Steema.TeeChart.Tools.SeriesHotspot)(WebChart1.Chart.Tools[0]));
            //			h1.MapElements="onClick=\"alert('x: ' + event.x + ' y: ' + event.y);\"";

            this.zoomTool1 = new Steema.TeeChart.Tools.ZoomTool(WebChart1.Chart);
            this.points1 = new Steema.TeeChart.Styles.Points(WebChart1.Chart);
            this.points2 = new Steema.TeeChart.Styles.Points(WebChart1.Chart);
            this.zoomTool2 = new Steema.TeeChart.Tools.ZoomTool(WebChart1.Chart);
        }

        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {

        }
        #endregion

         protected void ButtonZoomIn_Click(object sender, EventArgs e)
        {
            System.Drawing.Bitmap bmp = WebChart1.Chart.Bitmap((int)WebChart1.Width.Value, (int)WebChart1.Height.Value);
            WebChart1.Chart.Zoom.ZoomPercent(110);

            ExportChart(WebChart1.Chart);
        }


        protected void ButtonZoomOut_Click(object sender, EventArgs e)
        {
            System.Drawing.Bitmap bmp = WebChart1.Chart.Bitmap((int)WebChart1.Width.Value, (int)WebChart1.Height.Value);
            WebChart1.Chart.Zoom.ZoomPercent(87);

            ExportChart(WebChart1.Chart);

        }
}
}