EasyXLS

How to freeze rows or columns in C++

EasyXLS Excel library can be used to export Excel files in C++. The integration varies depending on the project technique, if .NET Framework can be used or not.

EasyXLS using COM+ for projects without .NET Framework

If you opt for the COM+ version of EasyXLS, be sure that you have EasyXLS installed and registered on your machine.

Step 1: Download and install EasyXLS Excel Library for COM+

To download the trial version of EasyXLS Excel Library, press the below button:

Download EasyXLS™ Excel Library for C++

If you already own a license key, you may login and download EasyXLS from your account.

Step 2: Verify if EasyXLS is registered

Check if EasyXLS component is present in Component Services.

Step 3: License file setup

Step required for EasyXLS v9.0 or later.

If you are using a trial, generate a trial license file from EasyXLS trials page. The trial license is valid for 30-days.

If you own a license key, you may login to the account that purchased the license and generate the license file from:
https://www.easyxls.com/my-orders

Setup the license file into your project using these guidelines.

Step 4: Run C++ code that freeze rows in Excel sheet

Execute the following C++ code that freezes the first row of a worksheet, when a report is exported to Excel file.

/* --------------------------------------------------------------------
 * Tutorial 18
 * 
 * This tutorial shows how to create an Excel file in C++ and
 * freeze first row from the sheet. The Excel file has multiple sheets.
 * The first sheet is filled with data and it has a frozen row.
 * -------------------------------------------------------------------- */

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

int main()
{
    printf("Tutorial 18\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 sheets
            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
            char* cellValue = (char*)malloc(11*sizeof(char));
            char*  columnNumber = (char*)malloc(sizeof(char));
            for (int column=0; column<5; column++)
            {
                strcpy_s(cellValue, 8, "Column ");			
                _itoa_s(column + 1, columnNumber, 2, 10);
                strcat_s(cellValue, 10, columnNumber);
                xlsFirstTable->easy_getCell(0,column)->setValue(cellValue); 
                xlsFirstTable->easy_getCell(0,column)->setDataType(DATATYPE_STRING);
            }
            xlsFirstTable->easy_getRowAt(0)->setHeight(30);

            // Add data in cells for report values
            char*  rowNumber = (char*)malloc(sizeof(char));
            for (int row=0; row<100; row++)
            {
                for (int column=0; column<5; column++)
                {
                    strcpy_s(cellValue, 6, "Data ");	
                    _itoa_s(column+ 1, columnNumber, 2, 10);
                    _itoa_s(row + 1, rowNumber, 4, 10);

                    strcat_s(cellValue, 10, rowNumber);
                    strcat_s(cellValue, 12, ", ");
                    strcat_s(cellValue, 13, columnNumber);

                    xlsFirstTable->easy_getCell(row+1,column)->setValue(cellValue); 
                    xlsFirstTable->easy_getCell(row+1,column)->setDataType(DATATYPE_STRING);
                }
            }

            // Set column widths
            xlsFirstTable->setColumnWidth_2(0, 70);
            xlsFirstTable->setColumnWidth_2(1, 100);
            xlsFirstTable->setColumnWidth_2(2, 70);
            xlsFirstTable->setColumnWidth_2(3, 100);
            xlsFirstTable->setColumnWidth_2(4, 70);		

            // Freeze row
            xlsFirstTable->easy_freezePanes_2(1, 0, 75, 0);

            // Export Excel file
            printf("Writing file C:\\Samples\\Tutorial18 - freeze rows or columns in Excel.xlsx.");
            workbook->easy_WriteXLSXFile("C:\\Samples\\Tutorial18 - freeze rows or columns in Excel.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 in C++.NET projects using .NET Framework

If you opt for the .NET Framework version of EasyXLS, you need a C++.NET project and to include EasyXLS.dll into project.

Step 1: Download EasyXLS Excel Library for .NET

To download the trial version of EasyXLS Excel Library, press the below button:

Download EasyXLS™ Excel Library for C++.NET

If you already own a license key, you may login and download EasyXLS from your account.

Install the downloaded EasyXLS installer for v8.6 or earlier.

Step 2: License file setup

Step required for EasyXLS v9.0 or later.

If you are using a trial, generate a trial license file from EasyXLS trials page. The trial license is valid for 30-days.

If you own a license key, you may login to the account that purchased the license and generate the license file from:
https://www.easyxls.com/my-orders

Setup the license file into your project using these guidelines.

Step 3: Include EasyXLS library into project

EasyXLS.dll must be added to your project. EasyXLS.dll can be found:
- Inside the downloaded archive at Step 1 for EasyXLS v9.0 or later
- Under installation path for EasyXLS v8.6 or earlier, in "Dot NET version" folder.

Step 4: Run C++ code that freeze rows in Excel sheet

Execute the following C++ code that freezes the first row of a worksheet, when a report is exported to Excel file.

/*---------------------------------------------------------------------
 | Tutorial 18
 |
 | This tutorial shows how to create an Excel file in C++.NET and
 | freeze first row from the sheet. The Excel file has multiple sheets.
 | The first sheet is filled with data and it has a frozen row.
 ----------------------------------------------------------------------*/

#include <conio.h>
#include <stdio.h>

using namespace System;
using namespace EasyXLS;
using namespace EasyXLS::Constants;

int main()
{
    Console::WriteLine("Tutorial 18\n----------\n");

    // Create an instance of the class that exports Excel files having two sheets
    ExcelDocument ^workbook = gcnew 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
    ExcelWorksheet ^xlsFirstTab = safe_cast<ExcelWorksheet^>(workbook->easy_getSheetAt(0));
    ExcelTable ^xlsFirstTable = xlsFirstTab->easy_getExcelTable();

    // Add data in cells for report header
    for (int column=0; column<5; column++)
    {
        xlsFirstTable->easy_getCell(0,column)->setValue(String::Concat("Column ",(column + 1).ToString()));
        xlsFirstTable->easy_getCell(0,column)->setDataType(DataType::STRING);
    }
    xlsFirstTable->easy_getRowAt(0)->setHeight(30);

    // Add data in cells for report values
    for (int row=0; row<100; row++)
    {
        for (int column=0; column<5; column++)
        {
            xlsFirstTable->easy_getCell(row+1,column)->setValue(
                String::Concat("Data ", (row + 1).ToString(), ", ", (column + 1).ToString()));
            xlsFirstTable->easy_getCell(row+1,column)->setDataType(DataType::STRING);
        }
    }

    // Set column widths
    xlsFirstTable->setColumnWidth(0, 70);
    xlsFirstTable->setColumnWidth(1, 100);
    xlsFirstTable->setColumnWidth(2, 70);
    xlsFirstTable->setColumnWidth(3, 100);
    xlsFirstTable->setColumnWidth(4, 70);

    // Freeze row
    xlsFirstTable->easy_freezePanes(1, 0, 75, 0);

    // Export Excel file
    Console::WriteLine("Writing file C:\\Samples\\Tutorial18 - freeze rows or columns in Excel.xlsx.");
    workbook->easy_WriteXLSXFile("C:\\Samples\\Tutorial18 - freeze rows or columns 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(String::Concat("\nError encountered: ", sError, "\nPress Enter to Exit..."));

    // Dispose memory
    delete workbook;

    Console::ReadLine();

    return 0;
}

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:

Office 365
MS Excel 2021 - 2024
MS Excel 2007 - 2019
MS Excel 97 - 2003
XLSXXLSMXLSBXLS
XMLHTMLCSVTXT