Assign a List object to another List in c#

Question

I have following classes:

public class ProviderQualification
{
    public List<ProviderDetail> ProviderDetails { get; set; }
}
public class ProviderDetail
{
    public string ProviderName { get; set; }
    public string ServiceableOffers { get; set; }
}
public class ProviderQualificationTimeViewModel
{
    public List<ProviderQualificationDetail> ProviderQualificationDetails { get; set; }
}
public class ProviderQualificationDetail
{
    public string ProviderName { get; set; }
    public string TotalServiceableOffers { get; set; }
}

I have ProviderQualification object populated with List<ProviderDetail>.

ProviderQualification providerQualification = reporting.GetProviderQualification();

Now I want to copy this list to my List<ProviderQualificationDetail>. How would I do that?

Do you mean you're trying to transform a List<ProviderDetail> into a List<ProviderQualificationDetail> just by creating new instance of ProviderQualificationDetail> an copying the properties? You should look at LINQ, and in particular the Select and ToList methods. — Jon Skeet
– Jon Skeet, Commented Nov 16, 2016 at 7:50
How to get TotalServiceableOffers from ServiceableOffers ? Concatenate with some delimiter ? Group by ProviderName ? Or Is it the same value with different property name ? — Zein Makki
– Zein Makki, Commented Nov 16, 2016 at 7:51
@JonSkeet yes. I want to assign List<ProviderDetail> to List<ProviderQualificationDetail>. Is it possible? — zaria khan
– zaria khan, Commented Nov 16, 2016 at 7:52
Just assigning it? No, absolutely not. Creating a new list, and populating it by converting each element of the old list? Yes. — Jon Skeet
– Jon Skeet, Commented Nov 16, 2016 at 7:53

Zein Makki · Accepted Answer · 2016-11-16 07:54:12Z

3

Using Linq:

List<ProviderQualificationDetail> result = 
         providerQualification.ProviderDetails.Select(
                         q => new ProviderQualificationDetail() 
                                   { 
                                       ProviderName  = q.ProviderName, 
                                       TotalServiceableOffers = q.ServiceableOffers 
                                   }).ToList();

Using Select you project each element in ProviderDetails into a new element of type ProviderQualificationDetail and then Enumerate that into a List.

answered Nov 16, 2016 at 7:54

Zein Makki

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Comments

poke · Accepted Answer · 2016-11-16 07:54:14Z

1

You need a mapping to get from ProviderDetail to ProviderQualificationDetail. For example, if you just want to copy over those values, you can just write it inline like this:

ProviderQualification providerQualification = reporting.GetProviderQualification();

var items = providerQualification.ProviderDetails
            .Select(detail => new ProviderQualificationDetail
                {
                    ProviderName = detail.ProviderName,
                    TotalServiceableOffers = detail.ServiceableOffers
                })
            .ToList();

var viewModel = new ProviderQualificationTimeViewModel
{
    ProviderQualificationDetails = items
};

answered Nov 16, 2016 at 7:54

poke

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Comments

cokceken · Accepted Answer · 2016-11-16 07:54:05Z

0

You can use

Enumerable.Select< TSource, TResult > Method (IEnumerable< TSource >, Func< TSource, TResult >)

For example

List<ProviderQualificationDetail> list = 
providerQualification.ProviderDetails
.Select(x => new ProviderQualificationDetail(){
    ProviderName = x.ProviderName,
    TotalServiceableOffers = x.ServiceableOffers
}).ToList();

answered Nov 16, 2016 at 7:54

cokceken

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Comments

Eldaniz Ismayilov · Accepted Answer · 2016-11-16 08:19:38Z

0

In my opinion, @zaria want to select distinct ProviderName and total ServiceableOffers. If she has ProviderQualification class why she wants to bind to ProviderQualificationDetail?

 List<ProviderQualificationDetail> list=providerQualification.ProviderDetails.GroupBy(x => x.ProviderName)
                                          .Select(x=>new ProviderQualificationDetail{
                                                   ProviderName =x.Key,
                                                   TotalServiceableOffers=Sum(y=>y.ServiceableOffers) 
                                           }).ToList();

edited Nov 16, 2016 at 8:19

answered Nov 16, 2016 at 8:09

Eldaniz Ismayilov

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