C# Program to Count File Extensions and Group it using LINQ

This is a C# Program to count file extensions and group it using linq.

Problem Description

This C# Program Counts File Extensions and Group it using LINQ.

Problem Solution

Here a service reads files generated in a folder every hour and returns a string array containing the file names and showes the count of files grouped by the file extension.

Program/Source Code

Here is source code of the C# Program to Count File Extensions and Group it using LINQ. The C# program is successfully compiled and executed with Microsoft Visual Studio. The program output is also shown below.

/*
 * C# Program to Count File Extensions and Group it using LINQ
 */
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
namespace ConsoleApplication9
{
    class Program
    {
        public static void Main()
        {
          string[] arr = { "aaa.txt", "bbb.TXT", "xyz.abc.pdf", "aaaa.PDF", 
                             "abc.xml", "ccc.txt", "zzz.txt" };
          var egrp=arr.Select(file=>Path.GetExtension(file).TrimStart('.').ToLower())
                     .GroupBy(x => x,(ext, extCnt) =>new
                                                     {
                                                        Extension = ext,
                                                        Count = extCnt.Count()
                                                      });
 
          foreach (var v in egrp)
              Console.WriteLine("{0} File(s) with {1} Extension ",
                                  v.Count, v.Extension);
          Console.ReadLine();
        }
    }
}

Program Explanation

This C# program is used to count file extensions and group it using LINQ. The service reads the files generated in a folder every hour and return a string array containing the file names and shows the count of files grouped by the file extension. Using foreach loop print the file extensions count.

Runtime Test Cases

 
4 File(s) with txt Extension
2 File(s) with pdf Extension
1 File(s) with xml Extension

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