放气流不读

Question

DeflateStream.Read 不起作用，我正在尝试从压缩的内存流中读取，但 read 的字节数组参数仍然为空。

        var memoryStream = new MemoryStream();

        var writeStream = new DeflateStream(memoryStream, CompressionLevel.Optimal, true);

        var readStream = new DeflateStream(memoryStream, CompressionMode.Decompress, true);

        var serializedPayloadBytes = Serialize(new Payload { Message = "Payload" });

        var serializedHeaderBytes = Serialize(new PayloadHeader { Length = serializedPayloadBytes.Length });

        var headerSize = serializedHeaderBytes.Length;

        var package = new byte[serializedHeaderBytes.Length + serializedPayloadBytes.Length];

        Buffer.BlockCopy(serializedHeaderBytes, 0, package, 0, serializedHeaderBytes.Length);

        Buffer.BlockCopy(serializedPayloadBytes, 0, package, serializedHeaderBytes.Length, serializedHeaderBytes.Length);

        writeStream.Write(package, 0, package.Length);

        writeStream.Flush();

        writeStream.Close();

        var arr = new byte[serializedHeaderBytes.Length];

        readStream.Read(arr, 0, headerSize);

arr 始终为空（所有字节均为零），memoryStream.ToArray() 有数据。

Answer 1

MemoryStreams 位置在写入后位于流的末尾。如果您想在写入后再次从同一流中读取，则必须将其设置回 0。

memoryStream.Position = 0;