If the command doesn't perform an insertion into a table the value of InsertOid won't be defined.
static void GetLastId(PgSqlConnection pgConnection) { PgSqlCommand pgCommand = new PgSqlCommand("INSERT INTO Test.Dept (DeptNo, DName, Loc) VALUES (Null, 'AnotherOne', 'SomeWhere')", pgConnection); pgConnection.Open(); try { pgCommand.ExecuteNonQuery(); Console.WriteLine(pgCommand.InsertOid); } finally { pgConnection.Close(); } }
Public Sub GetLastId(ByVal pgConnection As PgSqlConnection) Dim pgCommand As New PgSqlCommand("INSERT INTO Test.Dept (DeptNo, DName, Loc) VALUES (Null, 'AnotherOne', 'SomeWhere')", pgConnection) pgConnection.Open() Try pgCommand.ExecuteNonQuery() Console.WriteLine(pgCommand.InsertOid) Finally pgConnection.Close() End Try End Sub
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2