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Getting index of all items containing a value using Linq

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Getting index of all items containing a value using Linq

osyris zosar

5yAsked Dec 27, 2020, 2:00 AM3.6kLearn iOS Programming

I am just starting to learn Linq.

and i have this list

string[] names = { "jack", "harry", "James", "peter" };
List <string> list32 = new List<string>(names);

I would like to get all the index numbers of the items that contain a specific char

i have tried this

var mylinqQuery = from f in list32
where f.Contains('a')
select f;

but it only returns the full names

Can somebody help me with this

4 Replies

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Rajanikant Hawaldar5y ago
Hello osyris, Refer below LINQ articles / blogs for your learning.

https://www.c-sharpcorner.com/technologies/linq
Sachin Singh5y ago
the more robust solution is
var res=(list32.where(x=>x.contains('a')).Select((name, index) => new {name, index}.ToList()));
Mageshwaran R5y ago
Hi osyris,
Try this code,
string[] names = new string[] {"jack", "harry", "James", "peter" };
var mylinqQuery = from MyName in names
            where MyName.ToLowerInvariant().Contains("a")
            select new { Names_A = MyName };
Jose Hernandez5y ago
Try this: var indexes = listname.FindIndex(a => a.Contains("your criteria here")).ToList();