Question

I want to use LINQ to pass data from one custom collection to another. Its complicated because the collection has 2 sub collections.

Want to copy data to:

public class Quote
{
    public int Id { get; set; }
    public string Type { get; set; }
    public virtual ICollection<Rate> Rates { get; set; }
}

public class Rate
{
    public int Id { get; set; }
    public virtual ICollection<Option> Options { get; set; }
}

public class Option
{
    public int Id { get; set; }
    public decimal Price { get; set; }
}

from:

public class Quote
{
    public int QuoteId { get; set; }
    public string Type { get; set; }
    public string Destination { get; set; }
    public List<RateSet> RateSets { get; set; }
}


public class RateSet
{
    public int Id { get; set; }
    public decimal ValueMin { get; set; }
    public decimal ValueMax { get; set; }
    public List<Option> Options { get; set; }
}

public class Option
{
    public int Id { get; set; }
    public string Name { get; set; }
    public decimal? Price { get; set; }
}

I was getting somewhere with this but keeping hitting problems…

newQuotes = Quotes
    .Select(x => new Quote() {
        Id = x.QuoteId,
        Rates = x.RateSets.Select( y => new Rate() {
            Id = y.Id,
            Options = y.Options.Select(z => new Option() {
                Id = z.Id,
                Price = z.Price
            }).ToList(),....

to

Answer 1

Compiled without any errors

// to
public class Quote2
{
    public int Id { get; set; }
    public string Type { get; set; }
    public virtual ICollection<Rate> Rates { get; set; }
}

public class Rate
{
    public int Id { get; set; }
    public virtual ICollection<Option2> Options { get; set; }
}

public class Option2
{
    public int Id { get; set; }
    public decimal Price { get; set; }
}

// from
public class Quote1
{
    public int QuoteId { get; set; }
    public string Type { get; set; }
    public string Destination { get; set; }
    public List<RateSet> RateSets { get; set; }
}


public class RateSet
{
    public int Id { get; set; }
    public decimal ValueMin { get; set; }
    public decimal ValueMax { get; set; }
    public List<Option1> Options { get; set; }
}

public class Option1
{
    public int Id { get; set; }
    public string Name { get; set; }
    public decimal? Price { get; set; }
}

void Main()
{
    var Quotes = new List<Quote1>();

    var newQuotes = Quotes
    .Select(x => new Quote2 {
        Id = x.QuoteId,
        Rates = x.RateSets == null ? null : x.RateSets.Select( y => new Rate {
            Id = y.Id,
            Options = y.Options == null ? null : y.Options.Select(z => new Option2 {
                Id = z.Id,
                Price = z.Price.Value
            }).ToList()}).ToList()}).ToList();
}