Compare sub strings in a List of strings

Question

I have declared following List of strings-

List<string> lstfruits= new List<string>(){

{ "apple-2015.05.18.html" },
{ "apple-1997.01.11.html" },
{ "mango-2013.02.12.html" },
{ "peach-2015.04.12.html" },
{ "peach-1998.11.12.html" },
{ "other-2013.02.12.html" },

};

I need to match all records which contain 'apple'. Below are the results that I want-

"apple-2015.05.18.html"

"apple-1997.01.11.html"

I wrote below , but it returns zero results-

var items = lstfruits.Where(pp => pp.Substring(0, pp.IndexOf('-')) == "apple");

Please help where I am wrong.

T K · Answer

Thanks all for your replies. However have achieved using below- List items = lstfruits .Where (pp => System.IO.Path.GetFileNameWithoutExtension(pp).Substring(0 System.IO.Path.GetFileNameWithoutExtension(pp).IndexOf('-')) == apple).ToList();

Saroj Kumar Sahu · Answer

Then you can use List items = lstfruits.Where(pp => pp.Substring(0 pp.IndexOf('-')).Equals(apple)).ToList(); Or List items = lstfruits.FindAll(x => x.Contains(apple-));

Upendra Pratap Shahi · Answer

Use this code public void ListSeperation() { List lstfruitName = new List (); List lstfruits = new List (){ { apple-2015.05.18.html } { apple123-1997.01.11.html } { apple-1997.01.11.html } { mango-2013.02.12.html } { peach-2015.04.12.html } { peach-1998.11.12.html } { other-2013.02.12.html } }; string distinctby = apple; lstfruits = lstfruits.Where(diff => diff.Contains(distinctby)).ToList(); foreach (var item in lstfruits) { if (item.Split('-')[0].Length == distinctby.Length) { lstfruitName.Add(item); } } string replaced = ; replaced = ' + string.Join( lstfruits.ToArray()).Replace( '') + '; lbltest.Text = replaced; }

Srikanth Reddy · Answer

Foreach(var a in lstfruits) { if(a.SubString(0a.IndexOf(-)==apple) { console.writeline(a); } }

Bhushan Bhasme · Answer

hi T.k If Ia m Not Misunderstood You need To do like this something List lstfruitName = new List (); List lstfruits = new List (){ { apple-2015.05.18.html } { apple123-1997.01.11.html } { apple-1997.01.11.html } { mango-2013.02.12.html } { peach-2015.04.12.html } { peach-1998.11.12.html } { other-2013.02.12.html } }; string a = apple; lstfruits = lstfruits.Where(m => m.Contains(a)).ToList(); foreach (var item in lstfruits) { if (item.Split('-')[0].Length == a.Length) { lstfruitName.Add(item); } } //--------------------OR----- lstfruits = lstfruits.Where(m => m.Contains(a)).ToList(); foreach (var item in lstfruits) { if(item.Substring(0item.IndexOf('-'))==apple) { lstfruitName.Add(item); } } //===============OR------------ lstfruits = lstfruits.Where(m => m.Substring(0m.IndexOf('-'))==apple).ToList(); } Hope This Will Help You

T K · Answer

I need an exact match hence cannot use 'contains'. The lstfruits can contain itmes like appleAA-2015.05.18.html. I do not want such a result !!

Saroj Kumar Sahu · Answer

Hi There is no wrong with your code.this is working. if not try the below code: List items = lstfruits.Where(pp => pp.Substring(0 pp.IndexOf('-')) == apple).ToList(); OR List items = lstfruits.FindAll(x => x.Contains(apple));

Srikanth Reddy · Answer

use foreach for passing through all items. Foreach(var a in lstfruits) { if(a.contains(apple) { console.writeline(a); } }