Updated Wiki: Pivot Table example

Pivot Tables

In this example, we'll create a pivot table of monthly pastry sales. First, we'll need our Pastry class:

    public class Pastry
    {
    	public Pastry(string name, int amount, string month)
	    {
	   		Month = month;
		    Name = name;
		    NumberOfOrders = amount;
	    }
	    
	    public string Name { get; set; }
	    public int NumberOfOrders { get; set; }
	    public string Month { get; set; }
    }

Next, we'll mock up some data:

    var pastries = new List<Pastry>
    {
 	   new Pastry("Croissant", 150, "Apr"),
	    new Pastry("Croissant", 250, "May"),
	    new Pastry("Croissant", 134, "June"),
	    new Pastry("Doughnut", 250, "Apr"),
	    new Pastry("Doughnut", 225, "May"),
	    new Pastry("Doughnut", 210, "June"),
	    new Pastry("Bearclaw", 134, "Apr"),
	    new Pastry("Bearclaw", 184, "May"),
	    new Pastry("Bearclaw", 124, "June"),
	    new Pastry("Danish", 394, "Apr"),
	    new Pastry("Danish", 190, "May"),
	    new Pastry("Danish", 221, "June"),
	    new Pastry("Scone", 135, "Apr"),
	    new Pastry("Scone", 122, "May"),
	    new Pastry("Scone", 243, "June")
    };

And then we'll create a worksheet with this data in a table:

    var workbook = new XLWorkbook();
    var sheet = workbook.Worksheets.Add("PastrySalesData");
    
    // Insert our list of pastry data into the "PastrySalesData" sheet at cell 1,1
    var source = sheet.Cell(1, 1).InsertTable(pastries, "PastrySalesData", true);

Finally, we'll use that table as the source for our pivot table:

    // Create a range that includes our table, including the header row
    var range = source.DataRange;
    var header = sheet.Range(1, 1, 1, 3);
    var dataRange = sheet.Range(header.FirstCell(), range.LastCell());
    
    // Add a new sheet for our pivot table
    var ptSheet = workbook.Worksheets.Add("PivotTable");
    
    // Create the pivot table, using the data from the "PastrySalesData" table
    var pt = ptSheet.PivotTables.AddNew("PivotTable", ptSheet.Cell(1, 1), dataRange);
    
    // The rows in our pivot table will be the names of the pastries
    pt.RowLabels.Add("Name");
    
    // The columns will be the months
    pt.ColumnLabels.Add("Month");
    
    // The values in our table will come from the "NumberOfOrders" field
    // The default calculation setting is a total of each row/column
    pt.Values.Add("NumberOfOrders");

This will create a pivot table with a row for each pastry, a column for each month, and sales numbers in the cells. Each column and row will be totaled.