BufferedStream.CanRead 属性

定义

获取一个值,该值指示当前流是否支持读取。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

属性值

如果流支持读取,则为 true;如果流已关闭或是通过只写访问方式打开的,则为 falsetrue if the stream supports reading; false if the stream is closed or was opened with write-only access.

示例

此代码示例是为 BufferedStream 类提供的更大示例的一部分。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

注解

如果从 Stream 派生的类不支持读取,则调用 ReadReadByteBeginReadEndRead以及 PeekStreamReaderStringReaderTextReader 方法会引发 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.

如果流已关闭,此属性将返回 falseIf the stream is closed, this property returns false.

适用于

另请参阅