Exposing tabular data from your COM object - Part 2

#include "stdafx.h"
#include "DataObjectRowset.h"
#include "MyDataObject.h"


void CDataObjectRowset::GetColumnInformation(
   size_t column, 
   DBTYPE &dbType, 
   ULONG &size, 
   std::string &columnName, 
   DWORD &flags)
{
   ATLASSERT(m_pDataObject);
   
   dbType = DBTYPE_STR;
   size = m_pDataObject->m_columnSize;

   columnName = m_pDataObject->m_columnNames[column];

}

void CDataObjectRowset::GetColumnData(
   size_t row,
   size_t column,
   DBTYPE &dbType, 
   ULONG &size, 
   void *&pData,
   bool &bIsUpdatable)
{
   ATLASSERT(m_pDataObject);

   dbType = DBTYPE_STR;
   size = m_pDataObject->m_columnSize;
   pData = m_pDataObject->GetAt(row+1, column+1);

   bIsUpdatable = false;
}

size_t CDataObjectRowset::GetNumColumns()
{
   ATLASSERT(m_pDataObject);

   return m_pDataObject->m_numCols;
}

size_t CDataObjectRowset::GetNumRows() const
{
   ATLASSERT(m_pDataObject);

   return m_pDataObject->m_numRows;
}

HRESULT CDataObjectRowset::AddRow()
{
   ATLASSERT(m_pDataObject);

   if (SUCCEEDED(m_pDataObject->AddRow()))
   {
      return S_OK;
   }

   return E_FAIL;
}

HRESULT CDataObjectRowset::RemoveRow(int nIndex)
{
   ATLASSERT(m_pDataObject);

   if (SUCCEEDED(m_pDataObject->RemoveRow(nIndex)))
   {
      return DBROWSTATUS_S_OK;
   }

   return E_FAIL;
}