通过

IRowPosition::ClearRowPosition

  • 项目

Clears the value of the current hRow.

Syntax

HRESULT ClearRowPosition ();

Parameters

None.

Return Code

  • S_OK
    The method succeeded. Calling GetRowPosition returns a phRow value of DB_NULL_ROW and a pdwPositionFlags value of DBPOSITION_NOROW.

  • E_FAIL
    A provider-specific error occurred. The row position is unchanged.

  • DB_E_CANCELED
    The operation was canceled by a client during notification. The row position is unchanged.

  • E_UNEXPECTED
    IRowPosition::ClearRowPosition was called twice in a row.

    There is no current rowset.

Comments

IRowPosition::ClearRowPosition fires the following notification phases with the reason DBREASON_ROWPOSITION_CLEARED:

  • DBEVENTPHASE_OKTODO

  • DBEVENTPHASE_ABOUTTODO

  • DBEVENTPHASE_FAILEDTODO (if either of the above events is canceled)

Calling IRowPosition::SetRowPosition fires the remaining phases.

IRowPosition::ClearRowPosition must be called prior to the first and any subsequent IRowPosition::SetRowPosition calls.