[c#] Find element in List<> that contains a value

I have a List<MyClass> MyList where

public class MyClass
{
    public string name { get; set; }
    public string value { get; set; }
}

Given a name, I'd like to get the corresponding value. I have it currently implemented as:

MyList[MyList.FindIndex(item => String.Compare(item.name, "foo", 0) == 0)].value

Is there a cleaner way to do this?

This question is related to c# .net linq list

The answer is


hi body very late but i am writing

if(mylist.contains(value)){}


Enumerable.First returns the element instead of an index. In both cases you will get an exception if no matching element appears in the list (your original code will throw an IndexOutOfBoundsException when you try to get the item at index -1, but First will throw an InvalidOperationException).

MyList.First(item => string.Equals("foo", item.name)).value

You can use the Where to filter and Select to get the desired value.

MyList.Where(i=>i.name == yourName).Select(j=>j.value);

I would use .Equals() for comparison instead of ==.

Like so:

MyClass item = MyList.Find(item => item.name.Equals("foo"));

Particularly because it gives you options like StringComparison, which is awesome. Example:

MyClass item = MyList.Find(item => item.name.Equals("foo", StringComparison.InvariantCultureIgnoreCase);

This enables your code to ignore special characters, upper and lower case. There are more options.


Using function Find is cleaner way.

MyClass item = MyList.Find(item => item.name == "foo");
if (item != null) // check item isn't null
{
 ....
}

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