using System;using System.Collections.Generic;

namespace ContosoUniversity.Models{public class Student    {public int StudentID { get; set; }public string LastName { get; set; }public string FirstMidName { get; set; }public DateTime EnrollmentDate { get; set; }public virtual ICollection<Enrollment> Enrollments { get; set; }    }}

using System;using System.Collections.Generic;

namespace ContosoUniversity.Models{public class Enrollment    {public int EnrollmentID { get; set; }public int CourseID { get; set; }public int StudentID { get; set; }public decimal? Grade { get; set; }public virtual Course Course { get; set; }public virtual Student Student { get; set; }    }}

using System;using System.Collections.Generic;

namespace ContosoUniversity.Models{public class Course    {public int CourseID { get; set; }public string Title { get; set; }public int Credits { get; set; }public virtual ICollection<Enrollment> Enrollments { get; set; }    }}

 private readonly static string CONNECTION_STRING = "name=WlfSys_EFCF_ConnString";

 public SchoolContext()            : base(CONNECTION_STRING)//不写这个  默认的就是SchoolContext        {

        }

protected override void OnModelCreating(DbModelBuilder modelBuilder)        {

   modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();//移除复数表名的契约

           modelBuilder.Conventions.Remove<IncludeMetadataConvention>();//防止黑幕交易 要不然每次都要访问 EdmMetadata这个表

      ｝

 <connectionStrings><add name="WlfSys_EFCF_ConnString"        providerName="System.Data.SqlClient" connectionString="Data Source=.;Initial Catalog=WLFSchool;Integrated Security=True;Pooling=False" /></connectionStrings>

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Data.Entity;//记得引用命名空间using ContosoUniversity.Models;

namespace ContosoUniversity.DAL{public class SchoolInitializer : DropCreateDatabaseIfModelChanges<SchoolContext>    {

protected override void Seed(SchoolContext context)        {            var students = new List<Student>            {new Student { FirstMidName = "Carson",   LastName = "Alexander", EnrollmentDate = DateTime.Parse("2005-09-01") },new Student { FirstMidName = "Meredith", LastName = "Alonso",    EnrollmentDate = DateTime.Parse("2002-09-01") },new Student { FirstMidName = "Arturo",   LastName = "Anand",     EnrollmentDate = DateTime.Parse("2003-09-01") },new Student { FirstMidName = "Gytis",    LastName = "Barzdukas", EnrollmentDate = DateTime.Parse("2002-09-01") },new Student { FirstMidName = "Yan",      LastName = "Li",        EnrollmentDate = DateTime.Parse("2002-09-01") },new Student { FirstMidName = "Peggy",    LastName = "Justice",   EnrollmentDate = DateTime.Parse("2001-09-01") },new Student { FirstMidName = "Laura",    LastName = "Norman",    EnrollmentDate = DateTime.Parse("2003-09-01") },new Student { FirstMidName = "Nino",     LastName = "Olivetto",  EnrollmentDate = DateTime.Parse("2005-09-01") }            };            students.ForEach(s => context.Students.Add(s));            context.SaveChanges();

            var courses = new List<Course>            {new Course { Title = "Chemistry",      Credits = 3, },new Course { Title = "Microeconomics", Credits = 3, },new Course { Title = "Macroeconomics", Credits = 3, },new Course { Title = "Calculus",       Credits = 4, },new Course { Title = "Trigonometry",   Credits = 4, },new Course { Title = "Composition",    Credits = 3, },new Course { Title = "Literature",     Credits = 4, }            };            courses.ForEach(s => context.Courses.Add(s));            context.SaveChanges();

            var enrollments = new List<Enrollment>            {new Enrollment { StudentID = 1, CourseID = 1, Grade = 1 },new Enrollment { StudentID = 1, CourseID = 2, Grade = 3 },new Enrollment { StudentID = 1, CourseID = 3, Grade = 1 },new Enrollment { StudentID = 2, CourseID = 4, Grade = 2 },new Enrollment { StudentID = 2, CourseID = 5, Grade = 4 },new Enrollment { StudentID = 2, CourseID = 6, Grade = 4 },new Enrollment { StudentID = 3, CourseID = 1            },new Enrollment { StudentID = 4, CourseID = 1,           },new Enrollment { StudentID = 4, CourseID = 2, Grade = 4 },new Enrollment { StudentID = 5, CourseID = 3, Grade = 3 },new Enrollment { StudentID = 6, CourseID = 4            },new Enrollment { StudentID = 7, CourseID = 5, Grade = 2 },            };            enrollments.ForEach(s => context.Enrollments.Add(s));            context.SaveChanges();

        }    }}

 Database.SetInitializer<SchoolContext>(new SchoolInitializer());

    private SchoolContext db = new SchoolContext();

public ViewResult Index(){return View(db.Students.ToList());}

@model IEnumerable<ContosoUniversity.Models.Student>

@{    ViewBag.Title = "Students";}

<h2>Students</h2>

<p>    @Html.ActionLink("Create New", "Create")</p><table><tr><th></th><th>Last Name</th><th>First Name</th><th>Enrollment Date</th></tr>

@foreach (var item in Model) {<tr><td>            @Html.ActionLink("Edit", "Edit", new { id=item.StudentID }) |            @Html.ActionLink("Details", "Details", new { id=item.StudentID }) |            @Html.ActionLink("Delete", "Delete", new { id=item.StudentID })</td><td>            @Html.DisplayFor(modelItem => item.LastName)</td><td>            @Html.DisplayFor(modelItem => item.FirstMidName)</td><td>            @Html.DisplayFor(modelItem => item.EnrollmentDate)</td></tr>}

</table>