ISequentialStream::Write

  • Artículo

Writes a specified number of bytes into the stream object starting at the current read/write location within the stream.

Syntax

HRESULT Write(
   void const *   pv,           // Pointer to buffer into which the
                                //  stream is written
   ULONG          cb,           // Specifies the number of bytes to write
   ULONG *        pcbWritten);  // Specifies the actual number of
                                //  bytes written

Parameters

  • pv
    [in] Points to the buffer into which the stream should be written.

  • cb
    [in] The number of bytes of data to attempt to write into the stream.

  • pcbWritten
    [out] Pointer to a location where this method writes the actual number of bytes written to the stream object. The caller can set this pointer to NULL, in which case this method does not provide the actual number of bytes written.

Return Code

  • S_OK
    The data was successfully written into the stream object.

  • E_PENDING
    Asynchronous Storage only: Part or all of the data to be written is currently unavailable. For more information, see the documentation on the COM interface IFillLockBytes, and see "Asynchronous Storage" in the Structured Storage documentation.

  • STG_E_MEDIUMFULL
    The write operation was not completed because there is no space left on the storage device.

  • STG_E_ACCESSDENIED
    The caller does not have sufficient permissions for writing this stream object.

  • STG_E_CANTSAVE
    Data cannot be written for reasons other than lack of access or space.

  • STG_E_INVALIDPOINTER
    One of the pointer values is invalid.

  • STG_E_REVERTED
    The object has been invalidated by a revert operation above it in the transaction tree.

  • STG_E_WRITEFAULT
    The write operation was not completed due to a disk error.

Comments

ISequentialStream::Write writes the specified data to a stream object. The current read/write location within the stream is adjusted for the number of bytes actually written. The number of bytes actually written is returned in the pcbWrite parameter. If the byte count is zero bytes, the write operation has no effect.

The pcbWrite parameter can have a value even if an error occurs.