CODEWITHSUNDEEP
c#linqlist
Darshana
Darshana

Reputation: 2548

How to get object from a list

I want to get object in a list. I have following code

List<Product> productList = GetList();

var product = (from p in productList 
                   where p.Id == "xyz"
                   select new Product()
                       {
                           Id = p.Id,
                           -,
                           -
                       });

foreach ( var p in product)
{
    //some code
}

I need to get object directly into var product

Upvotes: 0

Views: 1859

Answers (3)

ken2k
ken2k

Reputation: 48975

You could use either .SingleOrDefault() or .Single().

var product = (from p in productList 
                   where p.Id == "xyz"
                   select new Product()
                       {
                           Id = p.Id,
                           -,
                           -
                       }).Single();

If productList is already a list of Product, then don't rebuild a new instance of the Product object using select new.

You could simply do:

var product = productList.SingleOrDefault(p => p.Id == ...);

Upvotes: 0

Andreas Eriksson
Andreas Eriksson

Reputation: 9027

You can use the more sensible "method"-syntax instead of the query syntax.

var product = productList.SingleOrDefault(p => p.Id == "xyz");

Edit: There's a couple of different methods you can use to get the element you're after.

.SingleOrDefault() will try to find the item you're looking for, returning null (default) if there is no object matching your expression.

.Single() will do the same thing, except it will throw an exception if the object wasn't found.

.FirstOrDefault() will get a list of objects matching your expression, and retrieve the first one. If there's several objects with Id xyz, both .Single() and .SingleOrDefault() will throw an exception.

.First() works like .FirstOrDefault() but similarly to .Single() will throw an exception if you didn't find what you were looking for.

Upvotes: 3

Mike Mooney
Mike Mooney

Reputation: 11989

List<Product> productList = GetList();

var product = (from p in productList 
                   where p.Id == "xyz"
                   select new Product()
                       {
                           Id = p.Id,
                           -,
                           -
                       }).SingleOrDefault();

Upvotes: 0

Related Questions