How to create pivot table in VB.NET

'--------------------------------------------------------------
' Tutorial 25
'
' This tutorial shows how to create an Excel file in VB.NET and
' to create a pivot table in a worksheet.
'--------------------------------------------------------------

Imports EasyXLS
Imports EasyXLS.Constants
Imports EasyXLS.PivotTables

Module Tutorial25

    Sub Main()

        Console.WriteLine("Tutorial 25" & vbCrLf & "----------" & vbCrLf)

        ' Create an instance of the class that exports Excel files, having two sheets
        Dim workbook As New ExcelDocument(2)

        ' Set the sheet names
        workbook.easy_getSheetAt(0).setSheetName("First tab")
        workbook.easy_getSheetAt(1).setSheetName("Second tab")
        
        ' Get the table of data for the first worksheet
        Dim xlsFirstTab As ExcelWorksheet = workbook.easy_getSheetAt(0)
        Dim xlsFirstTable = xlsFirstTab.easy_getExcelTable()

        ' Add data in cells for report header
        xlsFirstTable.easy_getCell(0,0).setValue("Sale agent")
        xlsFirstTable.easy_getCell(0,0).setDataType(DataType.STRING)
        xlsFirstTable.easy_getCell(0,1).setValue("Sale country")
        xlsFirstTable.easy_getCell(0,1).setDataType(DataType.STRING)
        xlsFirstTable.easy_getCell(0,2).setValue("Month")
        xlsFirstTable.easy_getCell(0,2).setDataType(DataType.STRING)
        xlsFirstTable.easy_getCell(0,3).setValue("Year")
        xlsFirstTable.easy_getCell(0,3).setDataType(DataType.STRING)
        xlsFirstTable.easy_getCell(0,4).setValue("Sale amount")
        xlsFirstTable.easy_getCell(0,4).setDataType(DataType.STRING)
        
        xlsFirstTable.easy_getRowAt(0).setBold(True)
        
        ' Add data in cells for report values - the source for pivot table
        xlsFirstTable.easy_getCell(1,0).setValue("John Down")
        xlsFirstTable.easy_getCell(1,1).setValue("USA")
        xlsFirstTable.easy_getCell(1,2).setValue("June")
        xlsFirstTable.easy_getCell(1,3).setValue("2010")
        xlsFirstTable.easy_getCell(1,4).setValue("550")
        
        xlsFirstTable.easy_getCell(2,0).setValue("Scott Valey")
        xlsFirstTable.easy_getCell(2,1).setValue("United Kingdom")
        xlsFirstTable.easy_getCell(2,2).setValue("June")
        xlsFirstTable.easy_getCell(2,3).setValue("2010")
        xlsFirstTable.easy_getCell(2,4).setValue("2300")
        
        xlsFirstTable.easy_getCell(3,0).setValue("John Down")
        xlsFirstTable.easy_getCell(3,1).setValue("USA")
        xlsFirstTable.easy_getCell(3,2).setValue("July")
        xlsFirstTable.easy_getCell(3,3).setValue("2010")
        xlsFirstTable.easy_getCell(3,4).setValue("3100")
        
        xlsFirstTable.easy_getCell(4,0).setValue("John Down")
        xlsFirstTable.easy_getCell(4,1).setValue("USA")
        xlsFirstTable.easy_getCell(4,2).setValue("June")
        xlsFirstTable.easy_getCell(4,3).setValue("2011")
        xlsFirstTable.easy_getCell(4,4).setValue("1050")
        
        xlsFirstTable.easy_getCell(5,0).setValue("John Down")
        xlsFirstTable.easy_getCell(5,1).setValue("USA")
        xlsFirstTable.easy_getCell(5,2).setValue("July")
        xlsFirstTable.easy_getCell(5,3).setValue("2011")
        xlsFirstTable.easy_getCell(5,4).setValue("2400")
        
        xlsFirstTable.easy_getCell(6,0).setValue("Steve Marlowe")
        xlsFirstTable.easy_getCell(6,1).setValue("France")
        xlsFirstTable.easy_getCell(6,2).setValue("June")
        xlsFirstTable.easy_getCell(6,3).setValue("2011")
        xlsFirstTable.easy_getCell(6,4).setValue("1200")
        
        xlsFirstTable.easy_getCell(7,0).setValue("Scott Valey")
        xlsFirstTable.easy_getCell(7,1).setValue("United Kingdom")
        xlsFirstTable.easy_getCell(7,2).setValue("June")
        xlsFirstTable.easy_getCell(7,3).setValue("2011")
        xlsFirstTable.easy_getCell(7,4).setValue("700")
        
        xlsFirstTable.easy_getCell(8,0).setValue("Scott Valey")
        xlsFirstTable.easy_getCell(8,1).setValue("United Kingdom")
        xlsFirstTable.easy_getCell(8,2).setValue("July")
        xlsFirstTable.easy_getCell(8,3).setValue("2011")
        xlsFirstTable.easy_getCell(8,4).setValue("360")
        
        ' Create pivot table
        Dim xlsPivotTable As New ExcelPivotTable
		
        xlsPivotTable.setName("Sales")
        xlsPivotTable.setSourceRange("First tab!$A$1:$E$9",workbook)
        xlsPivotTable.setLocation("A3:G15")
        xlsPivotTable.addFieldToRowLabels("Sale agent")
        xlsPivotTable.addFieldToColumnLabels("Year")
        xlsPivotTable.addFieldToValues("Sale amount","Sale amount per year",PivotTable.SUBTOTAL_SUM)
        xlsPivotTable.addFieldToReportFilter("Sale country")
        xlsPivotTable.setOutlineForm()
        xlsPivotTable.setStyle(PivotTable.PIVOT_STYLE_DARK_11)
		
        ' Add pivot table to the second sheet
        Dim xlsWorksheet As ExcelWorksheet = workbook.easy_getSheet("Second tab")
        xlsWorksheet.easy_addPivotTable(xlsPivotTable)

        ' Export Excel file
        Console.WriteLine("Writing file C:\Samples\Tutorial25 - pivot table in Excel.xlsx.")
        workbook.easy_WriteXLSXFile("C:\Samples\Tutorial25 - pivot table in Excel.xlsx")

        ' Confirm export of Excel file
        Dim sError As String = workbook.easy_getError()
        If (sError.Equals("")) Then
            Console.Write(vbCrLf & "File successfully created. Press Enter to Exit...")
        Else
            Console.Write(vbCrLf & "Error encountered: " & sError & vbCrLf & "Press Enter to Exit...")
        End If
        
        ' Dispose memory
        workbook.Dispose()
        
        Console.ReadLine()
    End Sub

End Module