How to create pivot table in C#.NET

/* ----------------------------------------------------------
 * Tutorial 25
 * 
 * This tutorial shows how to create an Excel file in C# and
 * to create a pivot table in a worksheet.
 * ---------------------------------------------------------- */

using System;
using EasyXLS;
using EasyXLS.Constants;
using EasyXLS.PivotTables;

public class Tutorial25
{
    [STAThread]
    static void Main()
    {
        Console.WriteLine("Tutorial 25\n----------\n");

        // Create an instance of the class that exports Excel files, having two sheets
        ExcelDocument workbook = 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
        ExcelTable xlsFirstTable = ((ExcelWorksheet)workbook.easy_getSheetAt(0)).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
        ExcelPivotTable xlsPivotTable = 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 the pivot table to the second sheet
        ((ExcelWorksheet)workbook.easy_getSheet("Second tab")).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
        String sError = workbook.easy_getError();
        if (sError.Equals(""))
            Console.Write("\nFile successfully created. Press Enter to Exit...");
        else
            Console.Write("\nError encountered: " + sError + "\nPress Enter to Exit...");

        // Dispose memory
        workbook.Dispose();

        Console.ReadLine();
    }
}