Selectin an object from list based on ineervariables value using Linq

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.NET3.5

I have list of object list1 ,from this list i want to select an object say "obj" with
obj.code="1001"
Please suggest Linq query for this

Posted 28-May-12 23:47pm

rajin kp

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2 solutions

Solution 1

You can try the below Code:

XML

IList<ResponseDTO> List1 = new List<ResponseDTO>();
ResponseDTO obj = (ResponseDTO)from listObject in List1
                         where listObject.Code == "1001"
                         select listObject;

Instead of ResponseDTO you can use your object.

Hope this helps.

Posted 29-May-12 0:03am

Rajesh Kariyavula

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VJ Reddy 30-May-12 8:53am

Good answer. 5!

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BobJanova · Accepted Answer · 2012-05-29T00:59:00

Or if you prefer the extension method syntax:

var matching = list1.Where(o => o.code == "1001");

If you know there's at most one and you want to get it then:

MyObjectType matching = list1.Where(o => o.code == "1001").FirstOrDefault();

FirstOrDefault returns null if there are no matches, if you require there to be a match then use First() which throws an exception if there are no matches.

All these extension methods are on IEnumerable<T>, so a List<MyObjectType> will be fine. They're in System.Linq.