C# Sharp Exercises: Read the first line from a file
C# Sharp File Handling: Exercise-11 with Solution
Write a program in C# Sharp to read the first line from a file.
Sample Solution:-
C# Sharp Code:
using System;
using System.IO;
using System.Text;
class filexercise11
{
public static void Main()
{
string fileName = @"mytest.txt";
try
{
// Delete the file if it exists.
if (File.Exists(fileName))
{
File.Delete(fileName);
}
Console.Write("\n\n Read the first line from a file :\n");
Console.Write("---------------------------------------\n");
// Create the file.
using (StreamWriter fileStr = File.CreateText(fileName))
{
fileStr.WriteLine(" test line 1");
fileStr.WriteLine(" test line 2");
fileStr.WriteLine(" Test line 3");
}
using (StreamReader sr = File.OpenText(fileName))
{
string s = "";
Console.WriteLine(" Here is the content of the file mytest.txt : ");
while ((s = sr.ReadLine()) != null)
{
Console.WriteLine(s);
}
Console.WriteLine("");
}
Console.Write("\n The content of the first line of the file is :\n");
if (File.Exists(fileName))
{
string[] lines = File.ReadAllLines(fileName);
Console.Write(lines[0]);
}
Console.WriteLine();
}
catch (Exception MyExcep)
{
Console.WriteLine(MyExcep.ToString());
}
}
}
Sample Output:
Read the first line from a file : --------------------------------------- Here is the content of the file mytest.txt : test line 1 test line 2 Test line 3 The content of the first line of the file is : test line 1
Flowchart :
C# Sharp Code Editor:
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Next: Write a program in C# Sharp to create and read the last line of a file.
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