BufferedStream.CanRead 屬性

定義

取得表示目前資料流是否支援讀取的值。Gets a value indicating whether the current stream supports reading.

public:
 virtual property bool CanRead { bool get(); };
public override bool CanRead { get; }
member this.CanRead : bool
Public Overrides ReadOnly Property CanRead As Boolean

屬性值

如果資料流支援讀取,則為 true;如果資料流已關閉或以唯寫存取開啟,則為 falsetrue if the stream supports reading; false if the stream is closed or was opened with write-only access.

範例

這個程式碼範例是針對 BufferedStream 類別所提供的較大範例的一部分。This code example is part of a larger example provided for the BufferedStream class.

if ( bufStream->CanRead )
{
   Client::ReceiveData( netStream, bufStream );
}

if(bufStream.CanRead)
{
    ReceiveData(netStream, bufStream);
}
If bufStream.CanRead Then
    ReceiveData(netStream, bufStream)
End If

備註

如果衍生Stream自的類別不支援讀取, 會呼叫BeginReadStringReaderTextReaderStreamReaderPeekReadReadByteEndRead、、、和的方法, 並擲回NotSupportedExceptionIf a class derived from Stream does not support reading, calls to the Read, ReadByte, BeginRead, EndRead, and the Peek methods of StreamReader, StringReader, and TextReader throw a NotSupportedException.

如果資料流程已關閉,此屬性會傳回 falseIf the stream is closed, this property returns false.

適用於

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