EasyXLS

How to create pivot table in C++

/* -----------------------------------------------------------
 * Tutorial 25
 * 
 * This tutorial shows how to create an Excel file in C++ and
 * to create a pivot table in a worksheet.
 * ----------------------------------------------------------- */
Click here to see the Excel file

#include "stdafx.h"
#include "EasyXLS.h"
#include <conio.h>

int _tmain(int argc, _TCHAR* argv[])
{
    printf("Tutorial 25\n----------\n");

    HRESULT hr;

    // Initialize COM
    hr = CoInitialize(0);

    // Use the SUCCEEDED macro and get a pointer to the interface
    if (SUCCEEDED(hr))
    {
        // Create a pointer to the interface that exports Excel files
        EasyXLS::IExcelDocumentPtr workbook;
        hr = CoCreateInstance(__uuidof(EasyXLS::ExcelDocument),
                              NULL,
                              CLSCTX_ALL,
                              __uuidof(EasyXLS::IExcelDocument),
                              (void**) &workbook);

        if (SUCCEEDED(hr)){

            // Create two worksheets
            workbook->easy_addWorksheet_2("First tab");
            workbook->easy_addWorksheet_2("Second tab");

            // Get the table of data for the first worksheet
            EasyXLS::IExcelWorksheetPtr xlsFirstTab = 
                    (EasyXLS::IExcelWorksheetPtr)workbook->easy_getSheetAt(0);
            EasyXLS::IExcelTablePtr 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
            EasyXLS::IExcelPivotTablePtr xlsPivotTable;
            hr = CoCreateInstance(__uuidof(EasyXLS::ExcelPivotTable),
                                  NULL,
                                  CLSCTX_ALL,
                                  __uuidof(EasyXLS::IExcelPivotTable),
                                  (void**) &xlsPivotTable);

            xlsPivotTable->setName("Sales");
            xlsPivotTable->setSourceRange("First tab!$A$1:$E$9",_variant_t((IDispatch*) workbook));
            xlsPivotTable->setLocation_2("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
            EasyXLS::IExcelWorksheetPtr xlsWorksheet = 
                    (EasyXLS::IExcelWorksheetPtr)workbook->easy_getSheet("Second tab");
            xlsWorksheet->easy_addPivotTable(xlsPivotTable);

            // Export Excel file
            printf("Writing file C:\\Samples\\Tutorial25.xlsx.");
            workbook->easy_WriteXLSXFile("C:\\Samples\\Tutorial25.xlsx");

            // Confirm export of Excel file
            _bstr_t sError = workbook->easy_getError();
            if (strcmp(sError, "") == 0){
                printf("\nFile successfully created. Press Enter to Exit...");
            }
            else{
                printf("\nError encountered: %s", (LPCSTR)sError);
            }

            // Dispose memory
            workbook->Dispose();
        }
        else{
            printf("Object is not available!");
        }
    }
    else{
        printf("COM can't be initialized!");
    }

    // Uninitialize COM
    CoUninitialize();

    _getch();
    return 0;
}

C++ and .NET Framework
This tutorial is valid for C++ applications that cannot use .NET Framework. It is recommended, for better performances, that if the C++ application already uses or can use .NET Framework to make use of this similar code sample.

Overloaded methods
For methods with same name but different parameters, only the first method overload retains the original name. Subsequent overloads are uniquely renamed by appending to the method name '_2', '_3', etc (method, method_2, method_3), an integer that corresponds to the order of declaration that can be found in EasyXLS.h, a file that comes with EasyXLS installation.

EasyXLS Excel libraries:

.NET
Excel Library for C++
full COM+ version to import, export or convert Excel files
Excel Writer for C++
COM+ version to create and export Excel files
Download EasyXLS™ Excel Library for C++

File formats:

MS Excel 97
MS Excel 2003
MS Excel 2007
MS Excel 2010
MS Excel 2013
MS Excel 2016
MS Excel 2019
XLS XLSX XLSM XLSB
XML HTML CSV TXT