CRowsetImpl::GetColumnInfo

Retrieves column information for a particular client request.

static ATLCOLUMNINFO* CRowsetBaseImpl::GetColumnInfo(
   T* pv,
   ULONG* pcCols 
);

Parameters

  • pv
    [in] A pointer to the user's CRowsetImpl derived class.

  • pcCols
    [in] A pointer (output) to the number of columns returned.

Return Value

A pointer to a static ATLCOLUMNINFO structure.

Remarks

This method is an advanced override.

This method is called by several base implementation classes to retrieve column information for a particular client request. Usually, this method would be called by IColumnsInfoImpl. If you override this method, you must place a version of the method in your CRowsetImpl-derived class. Because the method may be placed in a non-templatized class, you must change pv to the appropriate CRowsetImpl-derived class.

The following example demonstrates GetColumnInfo's usage. In this example, CMyRowset is a CRowsetImpl-derived class. In order to override GetColumnInfo for all instances of this class, place the following method in the CMyRowset class definition:

static ATLCOLUMNINFO* GetColumnInfo(CMyProviderRowset* pRowset, DBORDINAL* pcCols)
{
   // Add your implementation here and/or call the base class

   return CRowsetImpl::GetColumnInfo(pRowset, pcCols);
}

Requirements

Header: atldb.h

See Also

Concepts

CRowsetImpl Class

CRowsetImpl Members