◆ StreamReader() [7/14]

System.IO.StreamReader.StreamReader	(	Stream	stream,
		Encoding?	encoding = null,
		bool	detectEncodingFromByteOrderMarks = true,
		int	bufferSize = -1,
		bool	leaveOpen = false )

inline

Definition at line 147 of file StreamReader.cs.

    {
        if (stream == null)
        {
            ThrowHelper.ThrowArgumentNullException(ExceptionArgument.stream);
        }
        if (encoding == null)
        {
            encoding = Encoding.UTF8;
        }
        if (!stream.CanRead)
        {
            throw new ArgumentException(SR.Argument_StreamNotReadable);
        }
        if (bufferSize == -1)
        {
            bufferSize = 1024;
        }
        else if (bufferSize <= 0)
        {
            throw new ArgumentOutOfRangeException("bufferSize", SR.ArgumentOutOfRange_NeedPosNum);
        }
        _stream = stream;
        _encoding = encoding;
        _decoder = encoding.GetDecoder();
        if (bufferSize < 128)
        {
            bufferSize = 128;
        }
        _byteBuffer = new byte[bufferSize];
        _maxCharsPerBuffer = encoding.GetMaxCharCount(bufferSize);
        _charBuffer = new char[_maxCharsPerBuffer];
        _detectEncoding = detectEncodingFromByteOrderMarks;
        _checkPreamble = encoding.Preamble.Length > 0;
        _closable = !leaveOpen;
    }