通过

isAsync

  • 项目

Indicates whether provider data will populate the consumer application or control asynchronously.

Important

This feature will be removed in a future version of Windows. Avoid using this feature in new development work, and plan to modify applications that currently use this feature. Instead, write a fully functional OLE DB provider using the native OLE DB interfaces.

Syntax

HRESULT isAsync (
   BOOL    *pbAsynch);

Parameters

  • *pbAsynch
    [out] Boolean value indicating whether data is returned asynchronously (1) or not (0).

Return Codes

  • S_OK
    The method succeeded.

  • E_FAIL
    A provider-specific error occurred.

Comments

OLEDBSimpleProvider::isAsync should always return the appropriate state; it should never block.

In Java, IOLEDBSimpleProvider::isAsync returns type int instead of Boolean because of how the interface definition is generated. Developers should return 0 for false and a nonzero integer for true.