EndOfStreamException,带有简单的BinaryWriter和BinaryReader

Question

我正在使用以下代码:

var fileStream = new MemoryStream();
var binaryWriter = new BinaryWriter(fileStream);
var binaryReader = new BinaryReader(fileStream);

binaryWriter.Write("Hello");
var msg = binaryReader.ReadString();

但是我得到以下异常:

System.IO.EndOfStreamException: Unable to read beyond the end of the stream.

在读取之前,binaryReader.BaseStream.Length大于0,但binaryReader.PeekChar()返回-1.

我究竟做错了什么？

Answer 1

在您写入流后,流的位置将是您写入它的任何长度.

为了在写入后直接读取它,您必须重置流的位置:

binaryWriter.Write("Hello");
binaryWriter.BaseStream.Position = 0;
var msg = binaryReader.ReadString();

将导致原始"Hello"写入分配给的流msg.