程序从文件中读取前五个单词而不读取C＃中的完整文件 [英] Program to read first five words from a file without reading the full file in C#

问题描述

我不想阅读整个文件。我只是希望我的程序从文件中读出前五个单词。



我尝试过：



i使用readalllines和readalltext ..但它读取整个文件

i do not want to read the entire file. i just want my program to read first five words from the file.

What I have tried:

i used readalllines and readalltext.. but it read the whole file

推荐答案

TextReader很好： [ ^ ]



来自链接的例子：

TextReader is nice:[^]

example from link:

using (TextReader reader = File.OpenText(@"C:\perl.txt"))
{
    string line = reader.ReadLine();
    Console.WriteLine(line);
}

所以读取char-by-char并在5个字后停止...

StreamReader.Read方法（Char []，Int32，Int32）（系统。 IO） [ ^ ]

So read it char-by-char and stop after 5 words...
StreamReader.Read Method (Char[], Int32, Int32) (System.IO)[^]

重复使用 Readline ，直到获得所需的单词。例如，请参阅：如何：一次读取一行文本文件（Visual C＃）| Microsoft Docs [ ^ ]。

Repeadly use Readline, until you get the required words. See, for instance: How to: Read a Text File One Line at a Time (Visual C#) | Microsoft Docs[^].

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