Many to Many relation with Entity Framework in ASP.NET GridView in a simplified way

//------------------------------------------------------------------------------
// <auto-generated>
//    This code was generated from a template.
//
//    Manual changes to this file may cause unexpected behavior in your application.
//    Manual changes to this file will be overwritten if the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------

using System;
using System.Data.Objects;
using System.Data.Objects.DataClasses;
using System.Data.EntityClient;
using System.ComponentModel;
using System.Xml.Serialization;
using System.Runtime.Serialization;

[assembly: EdmSchemaAttribute()]
#region EDM Relationship Metadata

[assembly: EdmRelationshipAttribute("ManyToManyModel", "CustomerProduct", "Customer", System.Data.Metadata.Edm.RelationshipMultiplicity.Many, typeof(ManyToMany.Customer), "Product", System.Data.Metadata.Edm.RelationshipMultiplicity.Many, typeof(ManyToMany.Product))]

#endregion

namespace ManyToMany
{
    #region Contexts
    
    /// <summary>
    /// No Metadata Documentation available.
    /// </summary>
    public partial class ManyToManyEntities : ObjectContext
    {
        #region Constructors
    
        /// <summary>
        /// Initializes a new ManyToManyEntities object using the connection string found in the 'ManyToManyEntities' section of the application configuration file.
        /// </summary>
        public ManyToManyEntities() : base("name=ManyToManyEntities", "ManyToManyEntities")
        {
            this.ContextOptions.LazyLoadingEnabled = true;
            OnContextCreated();
        }
    
        /// <summary>
        /// Initialize a new ManyToManyEntities object.
        /// </summary>
        public ManyToManyEntities(string connectionString) : base(connectionString, "ManyToManyEntities")
        {
            this.ContextOptions.LazyLoadingEnabled = true;
            OnContextCreated();
        }
    
        /// <summary>
        /// Initialize a new ManyToManyEntities object.
        /// </summary>
        public ManyToManyEntities(EntityConnection connection) : base(connection, "ManyToManyEntities")
        {
            this.ContextOptions.LazyLoadingEnabled = true;
            OnContextCreated();
        }
    
        #endregion
    
        #region Partial Methods
    
        partial void OnContextCreated();
    
        #endregion
    
        #region ObjectSet Properties
    
        /// <summary>
        /// No Metadata Documentation available.
        /// </summary>
        public ObjectSet<Customer> Customers
        {
            get
            {
                if ((_Customers == null))
                {
                    _Customers = base.CreateObjectSet<Customer>("Customers");
                }
                return _Customers;
            }
        }
        private ObjectSet<Customer> _Customers;
    
        /// <summary>
        /// No Metadata Documentation available.
        /// </summary>
        public ObjectSet<Product> Products
        {
            get
            {
                if ((_Products == null))
                {
                    _Products = base.CreateObjectSet<Product>("Products");
                }
                return _Products;
            }
        }
        private ObjectSet<Product> _Products;

        #endregion
        #region AddTo Methods
    
        /// <summary>
        /// Deprecated Method for adding a new object to the Customers EntitySet. Consider using the .Add method of the associated ObjectSet&lt;T&gt; property instead.
        /// </summary>
        public void AddToCustomers(Customer customer)
        {
            base.AddObject("Customers", customer);
        }
    
        /// <summary>
        /// Deprecated Method for adding a new object to the Products EntitySet. Consider using the .Add method of the associated ObjectSet&lt;T&gt; property instead.
        /// </summary>
        public void AddToProducts(Product product)
        {
            base.AddObject("Products", product);
        }

        #endregion
    }
    

    #endregion
    
    #region Entities
    
    /// <summary>
    /// No Metadata Documentation available.
    /// </summary>
    [EdmEntityTypeAttribute(NamespaceName="ManyToManyModel", Name="Customer")]
    [Serializable()]
    [DataContractAttribute(IsReference=true)]
    public partial class Customer : EntityObject
    {
        #region Factory Method
    
        /// <summary>
        /// Create a new Customer object.
        /// </summary>
        /// <param name="customerId">Initial value of the CustomerId property.</param>
        public static Customer CreateCustomer(global::System.Int32 customerId)
        {
            Customer customer = new Customer();
            customer.CustomerId = customerId;
            return customer;
        }

        #endregion
        #region Primitive Properties
    
        /// <summary>
        /// No Metadata Documentation available.
        /// </summary>
        [EdmScalarPropertyAttribute(EntityKeyProperty=true, IsNullable=false)]
        [DataMemberAttribute()]
        public global::System.Int32 CustomerId
        {
            get
            {
                return _CustomerId;
            }
            set
            {
                if (_CustomerId != value)
                {
                    OnCustomerIdChanging(value);
                    ReportPropertyChanging("CustomerId");
                    _CustomerId = StructuralObject.SetValidValue(value);
                    ReportPropertyChanged("CustomerId");
                    OnCustomerIdChanged();
                }
            }
        }
        private global::System.Int32 _CustomerId;
        partial void OnCustomerIdChanging(global::System.Int32 value);
        partial void OnCustomerIdChanged();
    
        /// <summary>
        /// No Metadata Documentation available.
        /// </summary>
        [EdmScalarPropertyAttribute(EntityKeyProperty=false, IsNullable=true)]
        [DataMemberAttribute()]
        public global::System.String CustName
        {
            get
            {
                return _CustName;
            }
            set
            {
                OnCustNameChanging(value);
                ReportPropertyChanging("CustName");
                _CustName = StructuralObject.SetValidValue(value, true);
                ReportPropertyChanged("CustName");
                OnCustNameChanged();
            }
        }
        private global::System.String _CustName;
        partial void OnCustNameChanging(global::System.String value);
        partial void OnCustNameChanged();

        #endregion
    
        #region Navigation Properties
    
        /// <summary>
        /// No Metadata Documentation available.
        /// </summary>
        [XmlIgnoreAttribute()]
        [SoapIgnoreAttribute()]
        [DataMemberAttribute()]
        [EdmRelationshipNavigationPropertyAttribute("ManyToManyModel", "CustomerProduct", "Product")]
        public EntityCollection<Product> Products
        {
            get
            {
                return ((IEntityWithRelationships)this).RelationshipManager.GetRelatedCollection<Product>("ManyToManyModel.CustomerProduct", "Product");
            }
            set
            {
                if ((value != null))
                {
                    ((IEntityWithRelationships)this).RelationshipManager.InitializeRelatedCollection<Product>("ManyToManyModel.CustomerProduct", "Product", value);
                }
            }
        }

        #endregion
    }
    
    /// <summary>
    /// No Metadata Documentation available.
    /// </summary>
    [EdmEntityTypeAttribute(NamespaceName="ManyToManyModel", Name="Product")]
    [Serializable()]
    [DataContractAttribute(IsReference=true)]
    public partial class Product : EntityObject
    {
        #region Factory Method
    
        /// <summary>
        /// Create a new Product object.
        /// </summary>
        /// <param name="productId">Initial value of the ProductId property.</param>
        public static Product CreateProduct(global::System.Int32 productId)
        {
            Product product = new Product();
            product.ProductId = productId;
            return product;
        }

        #endregion
        #region Primitive Properties
    
        /// <summary>
        /// No Metadata Documentation available.
        /// </summary>
        [EdmScalarPropertyAttribute(EntityKeyProperty=true, IsNullable=false)]
        [DataMemberAttribute()]
        public global::System.Int32 ProductId
        {
            get
            {
                return _ProductId;
            }
            set
            {
                if (_ProductId != value)
                {
                    OnProductIdChanging(value);
                    ReportPropertyChanging("ProductId");
                    _ProductId = StructuralObject.SetValidValue(value);
                    ReportPropertyChanged("ProductId");
                    OnProductIdChanged();
                }
            }
        }
        private global::System.Int32 _ProductId;
        partial void OnProductIdChanging(global::System.Int32 value);
        partial void OnProductIdChanged();
    
        /// <summary>
        /// No Metadata Documentation available.
        /// </summary>
        [EdmScalarPropertyAttribute(EntityKeyProperty=false, IsNullable=true)]
        [DataMemberAttribute()]
        public global::System.String ProductName
        {
            get
            {
                return _ProductName;
            }
            set
            {
                OnProductNameChanging(value);
                ReportPropertyChanging("ProductName");
                _ProductName = StructuralObject.SetValidValue(value, true);
                ReportPropertyChanged("ProductName");
                OnProductNameChanged();
            }
        }
        private global::System.String _ProductName;
        partial void OnProductNameChanging(global::System.String value);
        partial void OnProductNameChanged();

        #endregion
    
        #region Navigation Properties
    
        /// <summary>
        /// No Metadata Documentation available.
        /// </summary>
        [XmlIgnoreAttribute()]
        [SoapIgnoreAttribute()]
        [DataMemberAttribute()]
        [EdmRelationshipNavigationPropertyAttribute("ManyToManyModel", "CustomerProduct", "Customer")]
        public EntityCollection<Customer> Customers
        {
            get
            {
                return ((IEntityWithRelationships)this).RelationshipManager.GetRelatedCollection<Customer>("ManyToManyModel.CustomerProduct", "Customer");
            }
            set
            {
                if ((value != null))
                {
                    ((IEntityWithRelationships)this).RelationshipManager.InitializeRelatedCollection<Customer>("ManyToManyModel.CustomerProduct", "Customer", value);
                }
            }
        }

        #endregion
    }

    #endregion
    
}