CDaoDatabaseInfo Structure

CDaoDatabaseInfo Structure

 

The CDaoDatabaseInfo structure contains information about a database object defined for data access objects (DAO).


      struct CDaoDatabaseInfo
{
   CString m_strName;       // Primary
   BOOL m_bUpdatable;       // Primary
   BOOL m_bTransactions;    // Primary
   CString m_strVersion;    // Secondary
   long m_lCollatingOrder;  // Secondary
   short m_nQueryTimeout;   // Secondary
   CString m_strConnect;    // All
};

m_strName

Uniquely names the database object. To directly retrieve this property, call CDaoDatabase::GetName. For details, see the topic "Name Property" in DAO Help.

m_bUpdatable

Indicates whether changes can be made to the database. To directly retrieve this property, call CDaoDatabase::CanUpdate. For details, see the topic "Updatable Property" in DAO Help.

m_bTransactions

Indicates whether a data source supports transactions — the recording of a series of changes that can later be rolled back (canceled) or committed (saved). If a database is based on the Microsoft Jet database engine, the Transactions property is nonzero and you can use transactions. Other database engines may not support transactions. To directly retrieve this property, call CDaoDatabase::CanTransact. For details, see the topic "Transactions Property" in DAO Help.

m_strVersion

Indicates the version of the Microsoft Jet database engine. To retrieve the value of this property directly, call the database object's GetVersion member function. For details, see the topic "Version Property" in DAO Help.

m_lCollatingOrder

Specifies the sequence of the sort order in text for string comparison or sorting. Possible values include:

  • dbSortGeneral   Use the General (English, French, German, Portuguese, Italian, and Modern Spanish) sort order.

  • dbSortArabic   Use the Arabic sort order.

  • dbSortCyrillic   Use the Russian sort order.

  • dbSortCzech   Use the Czech sort order.

  • dbSortDutch Use the Dutch sort order.

  • dbSortGreek   Use the Greek sort order.

  • dbSortHebrew   Use the Hebrew sort order.

  • dbSortHungarian   Use the Hungarian sort order.

  • dbSortIcelandic   Use the Icelandic sort order.

  • dbSortNorwdan   Use the Norwegian or Danish sort order.

  • dbSortPDXIntl   Use the Paradox International sort order.

  • dbSortPDXNor   Use the Paradox Norwegian or Danish sort order.

  • dbSortPDXSwe   Use the Paradox Swedish or Finnish sort order.

  • dbSortPolish   Use the Polish sort order.

  • dbSortSpanish   Use the Spanish sort order.

  • dbSortSwedFin   Use the Swedish or Finnish sort order.

  • dbSortTurkish   Use the Turkish sort order.

  • dbSortUndefined   The sort order is undefined or unknown.

For more information, see the topic "Customizing Windows Registry Settings for Data Access" in DAO Help.

m_nQueryTimeout

The number of seconds the Microsoft Jet database engine waits before a timeout error occurs when a query is run on an ODBC database. The default timeout value is 60 seconds. When QueryTimeout is set to 0, no timeout occurs; this can cause the program to stop responding. To retrieve the value of this property directly, call the database object's GetQueryTimeout member function. For details, see the topic "QueryTimeout Property" in DAO Help.

m_strConnect

Provides information about the source of an open database. For information about connect strings, and for information about retrieving the value of this property directly, see the CDaoDatabase::GetConnect member function. For more information, see the topic "Connect Property" in DAO Help.

The database is a DAO object underlying an MFC object of class CDaoDatabase. The references to Primary, Secondary, and All above indicate how the information is returned by the CDaoWorkspace::GetDatabaseInfo member function.

Information retrieved by the CDaoWorkspace::GetDatabaseInfo member function is stored in a CDaoDatabaseInfo structure. Call GetDatabaseInfo for the CDaoWorkspace object in whose Databases collection the database object is stored. CDaoDatabaseInfo also defines a Dump member function in debug builds. You can use Dump to dump the contents of a CDaoDatabaseInfo object.

Requirements

Header: afxdao.h

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