从文件末尾开始读取，类似于tail [英] Read from a file starting at the end, similar to tail

问题描述

在原生 C# 中，如何从文件末尾读取?

In native C#, how can I read from the end of a file?

这是相关的，因为我需要读取一个日志文件，读取 10k，读取最后 3 行没有意义.

This is pertinent because I need to read a log file, and it doesn't make sense to read 10k, to read the last 3 lines.

推荐答案

读取最后 1024 个字节:

To read the last 1024 bytes:

using (var reader = new StreamReader("foo.txt"))
{
    if (reader.BaseStream.Length > 1024)
    {
        reader.BaseStream.Seek(-1024, SeekOrigin.End);
    }
    string line;
    while ((line = reader.ReadLine()) != null)
    {
        Console.WriteLine(line);
    }
}

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