C# Sharp Exercises: Read a specific line from a file
C# Sharp File Handling: Exercise-13 with Solution
Write a program in C# Sharp to read a specific line from a file.
Sample Solution:-
C# Sharp Code:
using System;
using System.IO;
class filexercise13
{
static void Main()
{
string fileName = @"mytest.txt";
string[] ArrLines ;
int n,i,l;
Console.Write("\n\n Read a specific line from a file :\n");
Console.Write("----------------------------------------\n");
if (File.Exists(fileName))
{
File.Delete(fileName);
}
Console.Write(" Input number of lines to write in the file :");
n= Convert.ToInt32(Console.ReadLine());
ArrLines=new string[n];
Console.Write(" Input {0} strings below :\n",n);
for(i=0;i<n;i++)
{
Console.Write(" Input line {0} : ",i+1);
ArrLines[i] = Console.ReadLine();
}
System.IO.File.WriteAllLines(fileName, ArrLines);
Console.Write("\n Input which line you want to display :");
l = Convert.ToInt32(Console.ReadLine());
if(l>=1 && l<=n)
{
Console.Write("\n The content of the line {0} of the file {1} is : \n",l,fileName);
if (File.Exists(fileName))
{
string[] lines = File.ReadAllLines(fileName);
Console.WriteLine(" {0}",lines[l-1]);
}}
else
{
Console.WriteLine(" Please input the correct line no.");
}
Console.WriteLine();
}
}
Sample Output:
Read a specific line from a file : ---------------------------------------- Input number of lines to write in the file :2 Input 2 strings below : Input line 1 : welcome w3resource Input line 2 : this is a tutorial Input which line you want to display :1 The content of the line 1 of the file mytest.txt is : welcome w3resource
Flowchart :
C# Sharp Code Editor:
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