Memorystream.Read（）始终返回0个字节，其中空字节为[] [英] Memorystream.Read() always returns 0 bytesRead with empty byte[]

问题描述

我目前有一个 memorystream 长度约为 30000 （在此命名为memStream ）
我希望使用以下代码在块中读取该内存流（我在网上捡起并进行了一些修改）： / p>

I currently have a memorystream with length of about 30000 (Named memStream here) I wished to read this memorystream in chunks using the following code (I picked up on the net and modified somewhat):

        byte[] chunk = new byte[4096];
        bool hasNext = true;

        while(hasNext)
        {
            int index = 0;

            while (index < chunk.Length)
            {
                int bytesRead = memStream.Read(chunk, index, chunk.Length - index);
                if (bytesRead == 0)
                {
                    break;
                }
                index += bytesRead;
                //Do something with this chunk
            }
            if (index != 0) // Our previous chunk may have been the last one
            {
                //Do something with the last chunk
            }
            if (index != chunk.Length) // We didn't read a full chunk: we're done
            {
                hasNext = false;
            }
        }

但以下 read（ ）方法似乎不起作用

yet the following read()method doesn't appear to be working

  int bytesRead = memStream.Read(chunk, index, chunk.Length - index);

  WHERE
    chunk: new byte[4096]
    index: 0
    memstream: capacitiy & length : 34272
    memstream: position 0 (according to VS watch)

 Always returns
    0 bytesRead
    Chunk with all values containing '0'

有人知道为什么吗？

谢谢您的时间。

推荐答案

创建并填充MemoryStream后，需要将读取位置设置为开头，如下所示：

After creating and filling the MemoryStream, you need to set the read position to the begining like so:

memStream.Seek(0, SeekOrigin.Begin);

这篇关于Memorystream.Read（）始终返回0个字节，其中空字节为[]的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！