从文本文件读取特定行的方法是什么？

Question

I want to read a line from a text file, except that I want to specify the line to read.

I've tried:

using (StreamReader reader = new StreamReader(@"C:\\Program Files\\TTVB\\Users.txt"))

  { text = reader.ReadLine(acctMade); } 

acctMade is an int.

This returns:

No overload for method 'ReadLine' takes 1 arguments

Answer 1

If the file is not that big, you can use File.ReadAllLines to put the file into a array of strings:

string[] lines = File.ReadAllLines(@"C:\Program Files\TTVB\Users.txt");
Console.WriteLine(lines[acctMade]);

You need to use using System.IO; at the top of your code or use System.IO.File.ReadAllLines in order for it to be usable.

Answer 2

A variety of ways: Read certain line in a text file (CodeProject

A simple way using StreamReader:

string GetLine(string fileName, int line)
{
   using (var sr = new StreamReader(fileName)) {
       for (int i = 1; i < line; i++)
          sr.ReadLine();
       return sr.ReadLine();
   }
}

Snippet from: How do I read a specified line in a text file?

For a more efficient but complex way:

• Efficient way to read a specific line number of a file. (BONUS: Python Manual Misprint)