Add Signature Line to the Worksheet with C++

Introduction

Aspose.Cells provides the Picture.SignatureLine property to add the signature line of the worksheet.

How to Add Signature Line to Worksheet

The following sample code demonstrates how to use the Picture.SignatureLine property to add the signature line of the worksheet. The screenshot shows the effect of the sample code on the sample Excel file after execution.

Sample Code

#include <iostream>
#include <ctime>
#include "Aspose.Cells.h"

using namespace Aspose::Cells;
using namespace Aspose::Cells::DigitalSignatures;

int main() {
    Aspose::Cells::Startup();

    U16String srcDir(u"..\\Data\\01_SourceDirectory\\");

    Workbook wb;

    SignatureLine signatureLine;
    signatureLine.SetSigner(u"Aspose.Cells");
    signatureLine.SetTitle(u"signed by Aspose.Cells");

    wb.GetWorksheets().Get(0).GetShapes().AddSignatureLine(1, 1, signatureLine);

    U16String certificatePath = srcDir + u"rsa2048.pfx";
    U16String password = u"123456";

    std::time_t now = std::time(nullptr);
    struct tm now_tm;
    localtime_s(&now_tm, &now);

    Date currentDate{
        now_tm.tm_year + 1900,
        now_tm.tm_mon + 1,
        now_tm.tm_mday,
        now_tm.tm_hour,
        now_tm.tm_min,
        now_tm.tm_sec,
        0
    };

    DigitalSignature signature(certificatePath, password, u"test Microsoft Office signature line", currentDate);

    DigitalSignatureCollection dsCollection;
    dsCollection.Add(signature);

    wb.SetDigitalSignature(dsCollection);

    U16String outputPath = srcDir + u"signatureLine.xlsx";
    wb.Save(outputPath);

    std::cout << "Workbook with signature line saved successfully!" << std::endl;

    Aspose::Cells::Cleanup();
}