สร้าง docx โดยใช้ Mail merge ใน C++

using namespace Aspose::Words;
using namespace Aspose::Cells;

auto doc = MakeObject<Document>(u"Input1.docx");        
auto workbook = Factory::CreateIWorkbook(new String("Input2.xlsx"));
auto worksheet = workbook->GetIWorksheets()->GetObjectByIndex(0);
auto dataRange = worksheet->GetICells()->GetMaxDisplayIRange();

auto dataTable = worksheet->GetICells()->ExportArray(
   0, 0, dataRange->GetRowCount(), dataRange->GetColumnCount());
auto customersDataSource = MakeObject<BaseOperations::CustomerMailMergeDataSource>(dataTable);

doc->get_MailMerge()->Execute(customersDataSource);
doc->Save(u"Output.docx");

class ExcelDataSource : public IMailMergeDataSource
{
public:
    System::String convertCellsString(String cellsValue)
    {
        auto valCh = cellsValue.charValue();
        auto convertedString = System::String(valCh);
        String::deleteCharValue(valCh);
        return convertedString;
    }

    System::String get_TableName() override
    {
        return nullptr;
    }

    CustomerMailMergeDataSource(
     intrusive_ptr<Aspose::Cells::Systems::Array2D<Aspose::Cells::Systems::Object*>> data)
    {
        dataIn = data;

        for (int i = 0; i < data->At(0)->GetLength(); i++) {
            auto fieldName = data->GetValue(0, i)->ToString();
            m.insert({ convertCellsString(fieldName), i });
            i++;
        }

        mRecordIndex = 0;
    }        

    bool GetValue(System::String fieldName, SharedPtr<System::Object>& fieldValue) override
    {
        auto value = dataIn->GetValue(mRecordIndex, m.at(fieldName))->ToString();
        if (value == new String(""))
            return false;

        fieldValue = System::ObjectExt::Box<System::String>(convertCellsString(value));
        return true;        
    }

    bool MoveNext() override
    {
        mRecordIndex++;
        return mRecordIndex < dataIn->GetLength();            
    }

    SharedPtr<IMailMergeDataSource> GetChildDataSource(System::String tableName) override
    {
        return nullptr;            
    }

    intrusive_ptr<Aspose::Cells::Systems::Array2D<Aspose::Cells::Systems::Object*>> dataIn;
    std::unordered_map<System::String, int> m;
    int mRecordIndex;
};