EasyXLS

How to convert CSV file to Excel in C++

/* ---------------------------------------------------------------------
 * Tutorial 39
 * 
 * This tutorial shows how to convert CSV file to Excel in C++. The
 * CSV file generated by Tutorial 30 is imported, some data is modified
 * and after that is exported as Excel file.
 * --------------------------------------------------------------------- */
 Click here to see the Excel file

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

int _tmain(int argc, _TCHAR* argv[])
{
    printf("Tutorial 39\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 used to import/export Excel files
        EasyXLS::IExcelDocumentPtr workbook;
        hr = CoCreateInstance(__uuidof(EasyXLS::ExcelDocument),
                              NULL,
                              CLSCTX_ALL,
                              __uuidof(EasyXLS::IExcelDocument),
                              (void**) &workbook) ;

        if (SUCCEEDED(hr)){

            // Import CSV file
            printf("\nReading file: C:\\Samples\\Tutorial30.csv\n");
            if (workbook->easy_LoadCSVFile("C:\\Samples\\Tutorial30.csv"))
            {
                // Set worksheet name
                workbook->easy_getSheetAt(0)->setSheetName("First tab");

                // Add new worksheet and add some data in cells (optional step)
                workbook->easy_addWorksheet_2("Second tab"); 
                EasyXLS::IExcelWorksheetPtr xlsSecondTab = 
                    (EasyXLS::IExcelWorksheetPtr)workbook->easy_getSheetAt(1);
                EasyXLS::IExcelTablePtr xlsTable = xlsSecondTab->easy_getExcelTable();
                xlsTable->easy_getCell_2("A1")->setValue("Data added by Tutorial39");

                char* cellValue = (char*)malloc(11*sizeof(char));
                char* columnNumber = (char*)malloc(sizeof(char));
                for (int column=0; column<5; column++)
                {
                    strcpy_s(cellValue, 6, "Data ");
                    _itoa_s(column+ 1, columnNumber, 2, 10);
                    strcat_s(cellValue, 10, columnNumber);
                    xlsTable->easy_getCell(1, column)->setValue(cellValue);
                }

                // Export Excel file
                printf("Writing file C:\\Samples\\Tutorial39.xls.");
                workbook->easy_WriteXLSFile("C:\\Samples\\Tutorial39.xls");

                // Confirm conversion of CSV to Excel
                _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);
                }
            }
            else
            {
                printf("\nError reading file C:\\Samples\\Tutorial30.csv %s\n",
                            (LPCSTR)((_bstr_t)workbook->easy_getError()));
            }

            // 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
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