CODEWITHSUNDEEP
asp.netasp.net-mvc-4
kaboom
kaboom

Reputation: 833

mvc 4 cannot implicitly convert IEnumerable<anonymous>

I am very new to mvc and trying to get the concept. I am following this instruction to deal with many many relationship. But I create an interface and entity framework and use ninject to bind them together. Instead of 'books'and 'users' (like in the tutorial), I use 'groups' and 'users'. I read many posts about the same error but they dont seem to solve my problem

public interface IGroups
    {
        IQueryable<Group> Groups { get; }
    }

public class EFGroups : IGroups
    {
        private EFDbContextMainDb1 context = new EFDbContextMainDb1();

        public IQueryable<Group> Groups
        {
            get;
            set;
        }
    }

 public class EFDbContextMainDb1 : DbContext
    {
        public DbSet<Group> tblGroup { get; set; }

        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            modelBuilder.Entity<Group>().ToTable("tblGroup");

            base.OnModelCreating(modelBuilder);
        }

    }

public class GroupListViewModel
    {
        public IEnumerable<GroupNetworkUser> GroupNetworkUsers { get; set; }

    }

GroupListViewModel model = new GroupListViewModel
            {
                GroupNetworkUsers = testRepo.Groups.SelectMany(
                        group => group.Users,
                        (group, user) => new { 
                            userName = user.vch_NetworkID

                        }
                    )
            };

The error applies to "GroupNetworkUsers = testRepo.Groups.SelectMany(...". and says

Error   1   Cannot implicitly convert type 'System.Linq.IQueryable<AnonymousType#1>' to 'System.Collections.Generic.IEnumerable<Pho.Domain.Entities.GroupNetworkUser>'. An explicit conversion exists (are you missing a cast?) C:\visual_studio_project\pho\pho\Controllers\GroupsAndUsersController.cs    58  37  Pho.WebUI

Upvotes: 1

Views: 730

Answers (2)

NinjaNye
NinjaNye

Reputation: 7126

You need to build a new GroupNetworkUser object. Currently you are building an anonymous object

GroupListViewModel model = new GroupListViewModel
        {
            GroupNetworkUsers = testRepo.Groups.SelectMany(
                    group => group.Users,
                    (group, user) => new GroupNetworkUser {  // <-- Changed this line
                        UserName = user.vch_NetworkID    
                    }
                ).ToList()
        };

Upvotes: 1

Andy T
Andy T

Reputation: 9881

You need to convert it to a list:

GroupListViewModel model = new GroupListViewModel
            {
                GroupNetworkUsers = testRepo.Groups.SelectMany(
                        group => group.Users,
                        (group, user) => new { 
                            userName = user.vch_NetworkID    
                        }
                    ).ToList()
            };

Upvotes: 0

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