How do I convert from GroupBy() to object with Linq?

Question

The are two classes:

public class LocalizationPage { public string Title { get; set; } public List<LocalizationItem> LocalizationItemList { get; set; } } public class LocalizationItem { public int Id { get; set; } public string Key { get; set; } //... }

I need to get a LocalizationItem list and fill a LocalizationPage with it.

That's how I fill the LocalizationGroups list:

var LocalizationGroupsTemp = db.Localization.GroupBy(p => p.Page); List<LocalizationPage> LocalizationGroups = new List<LocalizationPage>(); foreach (var item in LocalizationGroupsTemp) { LocalizationGroups.Add(new LocalizationPage { Title = item.Key, LocalizationItemList = item.ToList() }); }

How to simplify it with using Linq somehow like this?

List<LocalizationPage> LocalizationGroups = _context.Localization .GroupBy(p => p.Page) .Select(grp => grp.ToList()) //... .ToList();

.Select(grp =>new LocalizationPage {Title = grp .Key,LocalizationItemList = grp .ToList() }) something like this — Renatas M.
– Renatas M., Commented Oct 31, 2018 at 16:05

Diego · Accepted Answer · 2018-10-31 16:07:12Z

You can do it within the Select

var localizationGroups = _context.Localization .GroupBy(p => p.Page) .Select(group => new LocalizationPage { Title = group.Key, LocalizationItemList = group.ToList() }) .ToList();

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