What is LINQ equivalent of SQL

Question

List<string> li = new List<string>();
        li.Add("10,11,12,1");
        li.Add("10,11,12,13");

        var q = from d in li
                where d.Contains("1")
                select d;

I have a list of string with two values. I have single value "1" and I want to fetch that list object which contains value "1" in string ie I want first object in list. If I use contains then it will return both list object values, so what will be query which gives me the perfect result?

Answer 1

Try changing the where to

where d.Split(',').Contains("1")

This will split the string into a list of items, and then check if the item is in that list.

EDIT:

As mentioned in the comments, you do not need the ToList() so changethe above.

Answer 2

If you want to run this query directly against database, you'll have to do something like this:

 var q = from d in li
            where d.StartsWith("1,") || d.EndsWith(",1") || d.Contains(",1,") 
             || d.Equals("1")
            select d;

Otherwise the other answer works in memory

Answer 3

You can try this:

List<string> li = new List<string>();
li.Add("10,11,12,1");
li.Add("10,11,12,13");
string searchItem = "1";
var q = from d in li
        where ("," + d + ",").Contains("," + searchItem + ",")
        select d;

and this query will also work for directly against database.

Answer 4

Try this:

var q =
    from d in li
    where d.Split(',').Any(x => x == "1")
    select d;