Map a MetadataType to the Entity Framework Model - ASP.NET MVC

In this article we are going to see how to map a MetadataType to the Model class for applying the additonal rules and conditions.In the following samples we are created the model using entity framework.

Model created by EntityFramwork :

[EdmEntityTypeAttribute(NamespaceName="EmployeeModel", Name="Department")]

    [Serializable()]

    [DataContractAttribute(IsReference=true)]

    public partial class Department : EntityObject

    {

        #region Factory Method

   

        /// <summary>

        /// Create a new Department object.

        /// </summary>

        /// <param name="id">Initial value of the ID property.</param>

        public static Department CreateDepartment(global::System.Int32 id)

        {

            Department department = new Department();

            department.ID = id;

            return department;

        }

        #endregion

        #region Primitive Properties

   

        /// <summary>

        /// No Metadata Documentation available.

        /// </summary>

        [EdmScalarPropertyAttribute(EntityKeyProperty=true, IsNullable=false)]

        [DataMemberAttribute()]

        public global::System.Int32 ID

        {

            get

            {

                return _ID;

            }

            set

            {

                if (_ID != value)

                {

                    OnIDChanging(value);

                    ReportPropertyChanging("ID");

                    _ID = StructuralObject.SetValidValue(value);

                    ReportPropertyChanged("ID");

                    OnIDChanged();

                }

            }

        }

        private global::System.Int32 _ID;

        partial void OnIDChanging(global::System.Int32 value);

        partial void OnIDChanged();

   

        /// <summary>

        /// No Metadata Documentation available.

        /// </summary>

        [EdmScalarPropertyAttribute(EntityKeyProperty=false, IsNullable=true)]

        [DataMemberAttribute()]

        public global::System.String NAME

        {

            get

            {

                return _NAME;

            }

            set

            {

                OnNAMEChanging(value);

                ReportPropertyChanging("NAME");

                _NAME = StructuralObject.SetValidValue(value, true);

                ReportPropertyChanged("NAME");

                OnNAMEChanged();

            }

        }

        private global::System.String _NAME;

        partial void OnNAMEChanging(global::System.String value);

        partial void OnNAMEChanged();

        #endregion

   

        #region Navigation Properties

   

        /// <summary>

        /// No Metadata Documentation available.

        /// </summary>

        [XmlIgnoreAttribute()]

        [SoapIgnoreAttribute()]

        [DataMemberAttribute()]

        [EdmRelationshipNavigationPropertyAttribute("EmployeeModel", "FK__EMPTABLE__DEPTID__1A14E395", "EMPTABLE")]

        public EntityCollection<Employee> Employees

        {

            get

            {

                return ((IEntityWithRelationships)this).RelationshipManager.GetRelatedCollection<Employee>("EmployeeModel.FK__EMPTABLE__DEPTID__1A14E395", "EMPTABLE");

            }

            set

            {

                if ((value != null))

                {

                    ((IEntityWithRelationships)this).RelationshipManager.InitializeRelatedCollection<Employee>("EmployeeModel.FK__EMPTABLE__DEPTID__1A14E395", "EMPTABLE", value);

                }

            }

        }

        #endregion

    }

   

  

MetadataType:

[MetadataType(typeof(DepartmentMetadata))]

    public partial class Department

    {

    }

    public class DepartmentMetadata

    {

        [Display(Name="Department Name")]

        public string NAME { set; get; }

    }

In this we need to change the display name of a Property, so we can see how to do this .



HTML :

@model EmpApp.Models.Employee

@{

    ViewBag.Title = "Details";

}

<h2>Details</h2>

<fieldset>

    <legend>Employee</legend>

    <div class="display-label">

         @Html.DisplayNameFor(model => model.NAME)

    </div>

    <div class="display-field">

        @Html.DisplayFor(model => model.NAME)

    </div>

    <div class="display-label">

         @Html.DisplayNameFor(model => model.Department.NAME)

    </div>

    <div class="display-field">

        @Html.DisplayFor(model => model.Department.NAME)

    </div>

    <div class="display-label">

         @Html.DisplayNameFor(model => model.COUNTRY)

    </div>

    <div class="display-field">

        @Html.DisplayFor(model => model.COUNTRY)

    </div>

    <div class="display-label">

         @Html.DisplayNameFor(model => model.MARRIED)

    </div>

    <div class="display-field">

        @Html.DisplayFor(model => model.MARRIED)

    </div>

</fieldset>

<p>

    @Html.ActionLink("Edit", "Edit", new { id=Model.ID }) |

    @Html.ActionLink("Back to List", "Index")

</p>