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C# Sharp Programming Exercises

C# Sharp Exercises: Create a file and write an array of strings

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C# Sharp File Handling : Exercise-6 with Solution

Write a program in C# Sharp to create a file and write an array of strings to the file.
Test Data :
Input number of lines to write in the file :2
Input 2 strings below :
Input line 1 : this is 1st line
Input line 2 : this is 2nd line
Expected Output :

 The content of the file is  :                                                                                
----------------------------------                                                                            
 this is 1st line                                                                                             
 this is 2nd line 

C# Sharp Code:

using System;
using System.IO;


class WriteTextFile
{
    static void Main()
    {
		string fileName = @"mytest.txt"; 
		string[] ArrLines ;
		int n,i;

	    Console.Write("\n\n Create a file and write an array of strings  :\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);
        
	using (StreamReader sr = File.OpenText(fileName)) 
        {
            string s = "";
             Console.Write("\n The content of the file is  :\n",n);
             Console.Write("----------------------------------\n");
            while ((s = sr.ReadLine()) != null) 
            {
                Console.WriteLine(" {0} ",s);
            }
            Console.WriteLine();
        }        
    }
}

C# Sharp Practice online:


using System;
using System.IO;


class WriteTextFile
{
    static void Main()
    {
		string fileName = @"mytest.txt"; 
		string[] ArrLines ;
		int n,i;

	    Console.Write("\n\n Create a file and write an array of strings  :\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);
        
	using (StreamReader sr = File.OpenText(fileName)) 
        {
            string s = "";
             Console.Write("\n The content of the file is  :\n",n);
             Console.Write("----------------------------------\n");
            while ((s = sr.ReadLine()) != null) 
            {
                Console.WriteLine(" {0} ",s);
            }
            Console.WriteLine();
        }        
    }
}

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