读取内存映射文件或者知道它的大小correctely阅读 [英] Read memory mapped file or knowing its size to read it correctely
问题描述
在这个问题上，
<一个href="http://stackoverflow.com/questions/14953393/read-all-contents-of-memory-mapped-file-or-memory-mapped-view-accessor-without-k">Read映射视图访问内存映射文件或内存不知道它的大小所有内容
还有一个问题，（INT）stream.Length 不给我正确的长度，它，而给使用的内部缓冲区的大小！我需要刷新这个问题，因为它是非常pressing。
there is a problem, the (int)stream.Length is not giving me the correct length, it rather gives the size of the internal buffer used! I need to refresh this question because it is very pressing.
主要问题是：
我需要类似的东西ReadToEnd或ReadAllBytes阅读全部 在MemoryMappedFile的使用MappedViewAccessor如果我的内容 不知道它的大小，我该怎么办呢？
I need something similar to ReadToEnd or ReadAllBytes to read all of the contents of the MemoryMappedFile using the MappedViewAccessor if I don't know the size of it, how can I do it?
我已经寻找它，我已经看到了这个问题，但它不是 我要寻找的东西：
I have searched for it, I have seen this question, but it is not the thing I am looking for:
我如何能快速读取内存映射文件的字节在.NET？
How can I quickly read bytes from a memory mapped file in .NET?
旧的答案是：
酒吧
public static ReadMMFAllBytes(string fileName)
{
using (var mmf = MemoryMappedFile.OpenExisting(fileName))
{
using (var stream = mmf.CreateViewStream())
{
using (BinaryReader binReader = new BinaryReader(stream))
{
return binReader.ReadBytes((int)stream.Length));
}
}
}
}
在这个问题：
有确切的问题没有确切的答案！问题是关于比标题别的东西。
There is no exact answer of the exact question! the question is about something else than the title.
推荐答案
最好的办法是在各种各样的固定长度的头信息中发送第一，而不是仅仅流原始字节。通过这种方式，第一个斑点，你读的是一致的长度，它给你，你需要阅读可变长度其余的信息。
The best approach is to send over a fixed-length header of sorts first, rather than just streaming raw bytes. This way the first blob you read is a consistent length and it gives you the info you need to read the variable-length remainder.
在简单的情况下，你的记录可以很简单，比如有书面第一长度字段，其次是有效载荷（你的字节）。根据您的需求，您可以将数据添加到像记录类型，版本等标题。
In the simplest case, your record could be as simple as having a length field written first, followed by the payload (your bytes). Depending on your needs, you can add data to the header like record type, version, etc.
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