How to create Combo chart

Possible Usage Scenarios

Combo charts in Excel let you avail of this option because you can easily combine two or more chart types to make your data understandable. Combo charts are helpful when your data contains multiple kinds of values including price and volume. Moreover, Combo charts are feasible when your data numbers change widely from series to series. Taking the following dataset as an example, we can observe that these data are quite similar to the data mentioned in VHCL. If we want to visualize series0, which corresponds to “Total Revenue,” as a Line chart, how should we proceed?

Combo chart

After running the code below, you will see the Combo chart as shown below.

Sample Code

The following sample code loads the sample Excel file and generates the output Excel file.

// Create the workbook
Workbook workbook = new Workbook("combo.xlsx");
// Access the first worksheet
Worksheet worksheet = workbook.Worksheets[0];
// Add a stock vloume(VHLC)
int pieIdx = worksheet.Charts.Add(ChartType.StockVolumeHighLowClose, 15, 0, 34, 12);
// Retrieve the Chart object
Chart chart = worksheet.Charts[pieIdx];
// Set the legend can be showed
chart.ShowLegend = true;
// Set the chart title name 
chart.Title.Text = "Combo Chart";
// Set the Legend at the bottom of the chart area
chart.Legend.Position = LegendPositionType.Bottom;
// Set data range
chart.SetChartDataRange("A1:E12", true);
// Set category data 
chart.NSeries.CategoryData = "A2:A12";
// Set the Series[1] Series[2] and Series[3] to different Marker Style
for (int j = 0; j < chart.NSeries.Count; j++)
{
	switch (j)
	{
		case 1:
			chart.NSeries[j].Marker.MarkerStyle = ChartMarkerType.Circle;
			chart.NSeries[j].Marker.MarkerSize = 15;
			chart.NSeries[j].Marker.Area.Formatting = FormattingType.Custom;
			chart.NSeries[j].Marker.Area.ForegroundColor = Color.Pink;
			chart.NSeries[j].Border.IsVisible = false;
			break;
		case 2:
			chart.NSeries[j].Marker.MarkerStyle = ChartMarkerType.Dash;
			chart.NSeries[j].Marker.MarkerSize = 15;
			chart.NSeries[j].Marker.Area.Formatting = FormattingType.Custom;
			chart.NSeries[j].Marker.Area.ForegroundColor = Color.Orange;
			chart.NSeries[j].Border.IsVisible = false;
			break;
		case 3:
			chart.NSeries[j].Marker.MarkerStyle = ChartMarkerType.Square;
			chart.NSeries[j].Marker.MarkerSize = 15;
			chart.NSeries[j].Marker.Area.Formatting = FormattingType.Custom;
			chart.NSeries[j].Marker.Area.ForegroundColor = Color.LightBlue;
			chart.NSeries[j].Border.IsVisible = false;
			break;
	}
}
// Set the chart type for Series[0] 
chart.NSeries[0].Type = ChartType.Line;
// Set style for the border of first series
chart.NSeries[0].Border.Style = LineType.Solid;
// Set Color for the first series
chart.NSeries[0].Border.Color =  Color.DarkBlue;
// Fill the PlotArea area with nothing 
chart.PlotArea.Area.Formatting = FormattingType.None;
// Save the Excel file
workbook.Save("out.xlsx");