How do I select an item from a list using linq

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I have two objects named Transactions and CreditorDetails . I want to be able to get the retrieve say CFirstName from my transations object. I don't want to retrieve it from CreditorDetails. for example, i want to be able to say

C#

foreach ( Transactions item in info.transaction)
                    {
      Console.WriteLine("My Name" + item.creditors.Select(m =>m.CFirstName));
                    }

The above code isn't giving me the desired result. it's returning system.linq.Enumerable+whereSelectListIterator........... which i think i know why but i need to be able to get the CFirstName from Transaction object.

What I have tried:

C#

<pre> class Transactions
    {
        public List<CreditorsDetails> creditors { get; set; }
}

C#

<pre> class CreditorsDetails {
        public string CFirstName { get; set; }
        public string CAddress { get; set; }
        public string CCountry { get; set; }
    }

Posted 10-Dec-17 22:13pm

Mcbaloo

Updated 10-Dec-17 22:29pm

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OriginalGriff · Answer 1 · 2017-12-10T22:22:00

Solution 1

Try:

item.creditors.Select(m =>m.CFirstName).FirstOrDefault()

Posted 10-Dec-17 22:22pm

OriginalGriff

Comments

Mcbaloo 11-Dec-17 4:28am

item.creditors contains two items . What i have noticed is that after applying FirstorDefault, only the first item is printed out(twice). I want the two items out.

F-ES Sitecore 11-Dec-17 4:34am

Then you'll need a loop

foreach ( Transactions item in info.transaction)
{
foreach (var fn in item.creditors.Select(m =>m.CFirstName))
{
....
}
}

OriginalGriff 11-Dec-17 4:49am

If you need more than one item returned, then you have to have a collection as the response - which is exactly what your original code was doing. It prints "system.linq.Enumerable+whereSelectListIterator" because that is the name of the class because it can't resolve the content to a single item, which WriteLine expects.
To print more than one item, you need to iterate over the collection that the Linq request returns inside your existing loop.

phil.o · Answer 2 · 2017-12-10T22:28:00

Solution 2

Apparently a Transactions instance can have multiple CreditorsDetails.
So item.creditors.Select(m => m.CFirstName) will yield an enumeration of creditors names.
You can try item.creditors.Select(m => m.CFirstName).FirstOrDefault(), but I suspect there is a flaw in your design.

Posted 10-Dec-17 22:28pm

phil.o