FileStream.BeginWrite(Byte[], Int32, Int32, AsyncCallback, Object) 方法
定義
重要
部分資訊涉及發行前產品,在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊,不做任何明確或隱含的瑕疵擔保。
開始非同步的寫入作業。 請考慮改用 WriteAsync(Byte[], Int32, Int32, CancellationToken)。
public:
override IAsyncResult ^ BeginWrite(cli::array <System::Byte> ^ array, int offset, int numBytes, AsyncCallback ^ callback, System::Object ^ state);
public:
override IAsyncResult ^ BeginWrite(cli::array <System::Byte> ^ buffer, int offset, int count, AsyncCallback ^ callback, System::Object ^ state);
public:
override IAsyncResult ^ BeginWrite(cli::array <System::Byte> ^ array, int offset, int numBytes, AsyncCallback ^ userCallback, System::Object ^ stateObject);
public override IAsyncResult BeginWrite (byte[] array, int offset, int numBytes, AsyncCallback? callback, object? state);
public override IAsyncResult BeginWrite (byte[] buffer, int offset, int count, AsyncCallback? callback, object? state);
public override IAsyncResult BeginWrite (byte[] buffer, int offset, int count, AsyncCallback callback, object state);
public override IAsyncResult BeginWrite (byte[] array, int offset, int numBytes, AsyncCallback callback, object state);
public override IAsyncResult BeginWrite (byte[] array, int offset, int numBytes, AsyncCallback callback, object? state);
public override IAsyncResult BeginWrite (byte[] array, int offset, int numBytes, AsyncCallback userCallback, object stateObject);
override this.BeginWrite : byte[] * int * int * AsyncCallback * obj -> IAsyncResult
override this.BeginWrite : byte[] * int * int * AsyncCallback * obj -> IAsyncResult
override this.BeginWrite : byte[] * int * int * AsyncCallback * obj -> IAsyncResult
Public Overrides Function BeginWrite (array As Byte(), offset As Integer, numBytes As Integer, callback As AsyncCallback, state As Object) As IAsyncResult
Public Overrides Function BeginWrite (buffer As Byte(), offset As Integer, count As Integer, callback As AsyncCallback, state As Object) As IAsyncResult
Public Overrides Function BeginWrite (array As Byte(), offset As Integer, numBytes As Integer, userCallback As AsyncCallback, stateObject As Object) As IAsyncResult
參數
- arraybuffer
- Byte[]
包含要寫入目前資料流之資料的緩衝區。
- offset
- Int32
array
中以零起始的位元組位移,即開始將位元組複製到目前資料流的位置。
- numBytescount
- Int32
寫入的最大位元組數。
- callbackuserCallback
- AsyncCallback
在非同步寫入作業完成時所呼叫的方法。
- statestateObject
- Object
使用者所提供的物件,其可以從其他要求中區分出這個特定非同步寫入的要求。
傳回
物件,參考非同步寫入。
例外狀況
array
長度減去 offset
小於 numBytes
。
array
為 null
。
offset
或 numBytes
為負。
資料流不支援寫入。
資料流已關閉。
發生 I/O 錯誤。