在C＃中读取一个大字节数组的最佳方法？(Best way to read a large file into a byte array in C#?)

在C＃中读取一个大字节数组的最佳方法？(Best way to read a large file into a byte array in C#?)

我有一个Web服务器将读取大型二进制文件（几兆字节）到字节数组。 服务器可能同时读取几个文件（不同的页面请求），所以我正在寻找最优化的方式来执行此操作，而不会对CPU太多征税。 代码是否足够好？

public byte[] FileToByteArray(string fileName) { byte[] buff = null; FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read); BinaryReader br = new BinaryReader(fs); long numBytes = new FileInfo(fileName).Length; buff = br.ReadBytes((int) numBytes); return buff; }

I have a web server which will read large binary files (several megabytes) into byte arrays. The server could be reading several files at the same time (different page requests), so I am looking for the most optimized way for doing this without taxing the CPU too much. Is the code below good enough?

public byte[] FileToByteArray(string fileName) { byte[] buff = null; FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read); BinaryReader br = new BinaryReader(fs); long numBytes = new FileInfo(fileName).Length; buff = br.ReadBytes((int) numBytes); return buff; }

最满意答案

只需用以下方式替换整个事物：

return File.ReadAllBytes(fileName);

但是，如果您担心内存消耗，则不应一次将整个文件读入内存。 你应该这样做的大块。

Simply replace the whole thing with:

return File.ReadAllBytes(fileName);

However, if you are concerned about the memory consumption, you should not read the whole file into memory all at once at all. You should do that in chunks.