IPrintReadStreamFactory::GetStream 方法 (filterpipeline.h)

方法 GetStream 會取得數據流介面。

語法

HRESULT GetStream(
  [out] IPrintReadStream **ppStream
);

參數

[out] ppStream

IPrintReadStream 介面的指標。 篩選條件可以使用這個介面來讀取列印票證的內容。

傳回值

GetStream 會傳回 HRESULT 值。

備註

下列程式代碼範例示範篩選如何使用 IPrintReadStreamFactory 來存取每個使用者列印票證。

VARIANT var;
VariantInit(&var);

HRESULT hr = pIPropertyBag->GetProperty(
  XPS_FP_USER_PRINT_TICKET,
  &var);

if (SUCCEEDED(hr))
{
 IPrintReadStreamFactory   *pPrintReadStreamFactory;

 hr = V_UNKNOWN(&var)->QueryInterface(
 IID_IPrintReadStreamFactory,
 reinterpret_cast<void **>(&pPrintReadStreamFactory));

 if (SUCCEEDED(hr))
    {
 IPrintReadStream *pPrintTicketStream;

 hr = pPrintReadStreamFactory->GetStream(&pPrintTicketStream);

 if (SUCCEEDED(hr))
      {

       // Use the print ticket here.
       // It's OK to cache the pointer
       // to use now and release later.

 pPrintTicketStream->Release();
      }

 pPrintReadStreamFactory->Release();
    }

 VariantClear(&var);
}

規格需求

需求
目標平台 桌面
標頭 filterpipeline.h