How to Count File Extensions and Group it using LINQ?

1 Answer

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

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();
        }
    }
}

Here is the output of the C# Program:

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

source :http://www.sanfoundry.com/csharp-program-count-file-extensions-linq/
Many answers are just a google away, Have a good day :)

answer Jun 6, 2017 by Andrews Wilfred Selvin

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using System.Collections.Generic;
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        private void button1_Click(object sender, EventArgs e)
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        }
        }
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and in form2 contain textboxes to add new item for these list ! how use this !

How to Count File Extensions and Group it using LINQ?

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