How to convert a list of string to a list of a class in C#?

Question

I have a list of string like this :

public List<string> Subs { get; set; }

and I have a list<Category> Cat { get; set; } of this class :

public class Category
    {
        public int ID { get; set; }

        public string Name { get; set; }

        public int SubCat_ID { get; set; }
    }

I just need to put all of the values in the list<string> Subs into the List<Category> Cat. and of course each string in the list<string> should be placed in each Name parameter of List<Category>.

So how is it done ? Is there any convert method which does the thing? how does it work ?

Thanks in advance ;)

mhusaini · Accepted Answer · 2012-08-19 14:41:20Z

3

Yes, you can do it with LINQ:

var cats = (from sub in Subs
            select new Category
            {
                Name = sub
            }).ToList();

answered Aug 19, 2012 at 14:41

mhusaini

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1 Comment

MgSam Over a year ago

Or, in method call syntax, subs.Select(sub => new Category { Name = sub }).ToList().

Paolo Tedesco · Accepted Answer · 2012-08-19 14:44:31Z

2

You can use the ConvertAll method of the List class:

Cat = Subs.ConvertAll(s => new Category { Name = s });

answered Aug 19, 2012 at 14:44

Paolo Tedesco

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Comments

cuongle · Accepted Answer · 2012-08-19 14:54:12Z

2

In case both lists exist, Zip should be used:

 var result = categories.Zip(subs, (cate, sub) =>
            {
                cate.Name = sub;
                return cate;
            });

answered Aug 19, 2012 at 14:54

cuongle

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Comments

Sebastian · Accepted Answer · 2012-08-19 14:44:03Z

1

Use the "Select" enumerable extension method:

http://msdn.microsoft.com/en-us/library/bb548891.aspx

followed by a "ToList()" like this:

var newList = Subs.Select(name => new Category { Name = name}).ToList();

answered Aug 19, 2012 at 14:44

Sebastian

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Comments

user1051218 · Accepted Answer · 2012-08-19 14:41:33Z

0

You have to make a function manually, otherwise it would be very hard for the program to understand what property should correspond to the string in the list.

answered Aug 19, 2012 at 14:41

user1051218

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