ASP.NET

using System;
using System.IO;

class Program
{
    static void Main()
    {
        string filePath = @"C:\Users\Abhijit\Test.html";

        string exten = Path.GetExtension(filePath );
        if (exten  == ".html")
        {
            //Do whatever you want 
        }
    }
}

Member 3879881 wrote:

but i amn't using a particular file...,

its collections of files need to bind in dropdownlist...,

private static void RemoveDuplicateItems(DropDownList ddl)
{

    for (int i = 0; i < ddl.Items.Count; i++)
    {
        ddl.SelectedIndex = i;

        string str = ddl.SelectedItem.ToString();

        for (int counter = i + 1; counter < ddl.Items.Count; counter++)
        {
            ddl.SelectedIndex = counter;

            string compareStr = ddl.SelectedItem.ToString();

            if (str == compareStr)
            {
                ddl.Items.RemoveAt(counter);

                counter = counter - 1;
            }
        }
    }
}

private void Bind_Restore_Combo()
{

DirectoryInfo dir = new DirectoryInfo(@"C:\DATABASES\");

FileInfo[] files = dir.GetFiles();

foreach (FileInfo file in files)
{

    if (file.Extension == ".htm" && file.Extension != ".html")
    {
           cmbrestore.Items.Add(Convert.ToString(file.Name));

            RemoveDuplicateItems(cmbrestore);
    }
 }
}