Get a list of unique strings from duplicate entries

Question

I'm looking for a LINQ function that returns a list of unique strings from a list of objects which contain these strings. The strings of the objects are not unique. Like this:

List before:

name="abc",value=3
name="xyz",value=5
name="abc",value=9
name="hgf",value=0

List this function would return:

"abc","xyz","hgf"

Does such a function even exist? Of course I know how I could implement this manually, but I was curious if LINQ can do this for me.

What is the source list? Is it string list, C# object or something else? — dotnetom, Feb 22 '15 at 08:45
repost? http://stackoverflow.com/questions/6231360/linq-query-to-return-distinct-field-values-from-a-list-of-objects — aaaaa says reinstate Monica, Feb 22 '15 at 08:46
@dotnetom As I wrote, it's a list of objects containing a string property. — AyCe, Feb 22 '15 at 08:52
possible duplicate of [Remove duplicates in the list using linq](http://stackoverflow.com/questions/1606679/remove-duplicates-in-the-list-using-linq) — AyCe, Jul 05 '15 at 11:07

score 3 · Accepted Answer · answered Feb 22 '15 at 08:46

3

var foo = list.Select(p => p.name).Distinct().ToList();

answered Feb 22 '15 at 08:46

Jan Köhler

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score 2 · Answer 2 · answered Feb 22 '15 at 08:45

2

You could use the Distinct extension method. So basically you will first project the original objects into a collection of strings and then apply the Distinct method:

string[] result = source.Select(x => x.name).Distinct().ToArray();

answered Feb 22 '15 at 08:45

Darin Dimitrov

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score 0 · Answer 3 · edited Feb 22 '15 at 10:13

0

(from object in objectList
 select object.name).Distinct();

edited Feb 22 '15 at 10:13

Mohamad Shiralizadeh

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answered Feb 22 '15 at 08:55

Thair

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Get a list of unique strings from duplicate entries

3 Answers3