Determine if LINQ Enumerable contains an object based on a condition?

Question

I have IEnumerable<Project>

I want to know if there is any item in this list Project.ID == someID

.

Is there a way to do this?

+3

jmasterx Feb 14 At 20:12

4 answers

var hasAny = projectList.Any(proj => proj.ID == someID);

Or, if you want to get this entry, you can use FirstOrDefault () :

var matchedProject = projectList.FirstOrDefault(proj => proj.ID == someID);

This will return null

if it doesn't find anything that matches, but pulls out the entire object if it finds one.

+5

IronMan84 Feb 14 13 at 20:14

Using

projects.Any(p => p.ID == someID)

returns true (boolean) if the predicate matches any element.

+4

vidalsasoon Feb 14 13 at 20:14

Yes, use the extension method Any

:

list.Any(p => p.ID == someID);

+3

driis Feb 14 13 at 20:14

yoozer8 · Accepted Answer · 2013-02-14T20:13:58+0000

Yes, you want to use the method Any

( documentation ).

IEnumerable<Project> projects = SomeMethodReturningProjects();
if(projects.Any(p => p.ID == someID))
{
    //Do something...
}