How to update multiple model data in C# MVC

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While creating an e-commerce app I am trying to update buyer from buyer table and its address from location table. In short I am trying to update multiple models using view Model. I am confused with lamda expression.

Plus the foreachloop here is creating problem.
The error says "

An exception of type 'System.NotSupportedException' occurred in EntityFramework.SqlServer.dll but was not handled in user code

Additional information: Unable to create a constant value of type 'InventorySystem.Models.Buyer'. Only primitive types or enumeration types are supported in this context.

"

What I have tried:

I have tried

var buyers = _context.Buyers.Join(_context.Locations, d => d.LocationId, o => o.id, (d, o) => new { c.Location, c.Buyer }).AsEnumerable();
            var viewModel = from l in _context.Locations
                            join b in _context.Buyers
                            on l.id equals (b.LocationId)
                            select new CustomerFormViewModel { Buyer = c.Buyer, Location = c.Location };
            foreach (var v in buyers)
            {
                v.Buyer.FName = c.Buyer.FName;
                v.Buyer.MName = c.Buyer.MName;
                v.Buyer.LName = c.Buyer.LName;
                v.Buyer.MembershipTypeId = c.Buyer.MembershipTypeId;
                v.Buyer.Verified = c.Buyer.Verified;
                v.Location.address = c.Location.address;
                v.Location.city = c.Location.city;
                v.Location.email = c.Location.email;
                v.Location.phone = c.Location.phone;
                v.Location.zipcode = c.Location.zipcode;

            }
_context.savechanges

Posted 24-Jan-17 12:24pm

Emrik Dml

Updated 25-Jan-17 0:32am

v2

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Emrik Dml 25-Jan-17 6:30am

While executing foreach loop I get following error
"An exception of type 'System.NotSupportedException' occurred in EntityFramework.SqlServer.dll but was not handled in user code

Additional information: Unable to create a constant value of type 'InventorySystem.Models.Buyer'. Only primitive types or enumeration types are supported in this context."

sonymon mishra 25-Jan-17 7:54am

on which line it is showing error?

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sonymon mishra · Answer 1 · 2017-01-24T18:33:00

var viewModel = from l in _context.Locations
                            join b in _context.Buyers
                            on l.id equals (b.LocationId)
                            select new  { Buyer = c.Buyer, Location = c.Location };
            foreach (var v in viewModel)
            {
                v.Buyer.FName = c.Buyer.FName;
                v.Buyer.MName = c.Buyer.MName;
                v.Buyer.LName = c.Buyer.LName;
                v.Buyer.MembershipTypeId = c.Buyer.MembershipTypeId;
                v.Buyer.Verified = c.Buyer.Verified;
                v.Location.address = c.Location.address;
                v.Location.city = c.Location.city;
                v.Location.email = c.Location.email;
                v.Location.phone = c.Location.phone;
                v.Location.zipcode = c.Location.zipcode;
            }
            _context.SaveChanges();//This will update your changes to the database