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This documentation is for the legacy Izenda 6 product. Documentation for the new Izenda 7 product can be found at https://www.izenda.com/docs/

Table of Contents

Purpose

By default, Izenda uses HTML charting engine. Charting engine can be set via AdHocSettings.ChartingEngine. For more information, refer to ChartingEngine. Izenda charts will display two or more y axes on a chart if multiple plotted items have different ranges. This is to prevent very high values from making lower values unreadably small on the chart, and allow for proportional comparison.

If you would like to override this feature and display only one chart, you can use the following code:

Please note that hiding an axis and using a common axis are not the same thing and charts will look different**.

C# (HTML engine)

//Code to hide the right Y axis:
public override void CustomizeChart(object chart, Hashtable properties)
{
	if (chart is StringBuilder)
	{
		StringBuilder sb = (StringBuilder)chart;
		String strChart = sb.ToString();

		if (!strChart.Contains("BarChart"))
			return;

		string pattern = @"var\s+(?<chartvarname>BarChart\d+Instance);";
		string chartVarName = Regex.Match(strChart, pattern).Groups["chartvarname"].Value;

		sb = sb.Replace("} catch (e) {", "var yAxisLength = " + chartVarName + ".yAxis.length; if(yAxisLength > 1){ for(var i = 1; i < yAxisLength; ++i){" + chartVarName + ".options.yAxis[i].labels.enabled = false; " + chartVarName + ".options.yAxis[i].title.text = null; " + chartVarName + ".yAxis[i].update();}}} catch (e) {");
	}

	base.CustomizeChart(chart, properties);
}


//Сode to use a common (left) Y axis:
public override void CustomizeChart(object chart, Hashtable properties)
{
	if (chart is StringBuilder)
	{
		StringBuilder sb = (StringBuilder)chart;
		String strChart = sb.ToString();
		
		if (!strChart.Contains("BarChart"))
			return;

		sb = sb.Replace("yAxis: 1", "");
	}
		
	base.CustomizeChart(chart, properties);
}

C# (Dundas engine)

//Code to hide the right Y axis:
public override void CustomizeDundasChart(object chart, Hashtable properties, Type chartType)
{
	if (chartType.FullName != "Izenda.AdHoc.DundasBarChart")
		return;
	
	Dundas.Charting.WebControl.Chart dchart = chart as Dundas.Charting.WebControl.Chart;
	if (dchart == null)
		return;

	foreach (Dundas.Charting.WebControl.ChartArea chartArea in dchart.ChartAreas)
	{
		chartArea.AxisY2.Enabled = Dundas.Charting.WebControl.AxisEnabled.False;
	}

	base.CustomizeDundasChart(chart, properties, chartType);
}


//Сode to use a common (left) Y axis:
public override void CustomizeDundasChart(object chart, Hashtable properties, Type chartType)
{
	if (chartType.FullName != "Izenda.AdHoc.DundasBarChart")
		return;
		
	Dundas.Charting.WebControl.Chart dchart = chart as Dundas.Charting.WebControl.Chart;
	if (dchart == null)
		return;

	foreach (Dundas.Charting.WebControl.Series series in dchart.Series)
	{
		if (series.YAxisType == Dundas.Charting.WebControl.AxisType.Secondary)
		{
			series.YAxisType = Dundas.Charting.WebControl.AxisType.Primary;
		}
	}

	base.CustomizeDundasChart(chart, properties, chartType);
}

VB (Dundas Engine)

Public Overrides Sub CustomizeDundasChart(chart As Object, properties As Hashtable, chartType As Type)
 If chartType.FullName <> "Izenda.AdHoc.DundasBarChart" Then
  Return
 End If
 Dim dchart As Dundas.Charting.WebControl.Chart = TryCast(chart, Dundas.Charting.WebControl.Chart)
 If dchart Is Nothing Then
  Return
 End If

 If dchart.Series.Count > 1 Then
  dchart.Series(1).YAxisType = Dundas.Charting.WebControl.AxisType.Primary
 End If
End Sub