Question

该系统用于管理电影租赁。用户可以管理客户，添加管理电影和管理租赁。

以下是我的模特：

客户模型

namespace u1265196_MovieRentals.Models
{
    public class Customers
    {


        [Display(Name = "Customer ID")]
        [Key]
        public int CustomerID { get; set; }
        [Required]
        [Display(Name = "First Name")]
        public string FirstName { get; set; }
        [Required]
        [Display(Name = "Last Name")]
        public string LastName { get; set; }
        [Required]
        [Display(Name = "Address Line 1")]
        public string AddressLine1 { get; set; }
        [Required]
        [Display(Name = "Address Line 2")]
        public string AddressLine2 { get; set; }
        [Required]
        [Display(Name = "City")]
        public string City { get; set; }
        [Required]
        [Display(Name = "Postcode")]
        public string Postcode { get; set; }
        [Required]
        [Display(Name = "Phone No")]
        public string Phone { get; set; }

        public virtual ICollection<Rentals> Rentals { get; set; }

    }

}

电影型号：

namespace u1265196_MovieRentals.Models
{
    public class Movies
    {
        public int MovieID { get; set; }
        [Required]
        public string Title { get; set; }
        [Required]
        public string Director { get; set; }
        [Required]
        public string Genre { get; set; }
        [Required]
        [Display(Name = "Length of film")]
        public string Length { get; set; }
        [Required]
        public int AgeRating { get; set; }

        public virtual ICollection<Rentals> Rentals { get; set; }
    }
}

租赁模型：

namespace u1265196_MovieRentals.Models
{
    public class Rentals
    {
        [Key]
        public int RentalID { get; set; }

        public int CustomerID { get; set; }
        public int MovieID { get; set; }
        public System.DateTime DateRented { get; set; }
        public System.DateTime ReturnDate { get; set; }

        [ForeignKey("CustomerID")]
        public virtual Customers Customers { get; set; }

        [ForeignKey("MovieID")]
        public virtual Movies Movies { get; set; }
    }
}

在我的租借视图中，我想显示一个包含所有客户优先+姓氏的下拉列表。我还想显示一个包含所有电影标题的下拉列表。

当用户从下拉列表中选择客户和电影并点击保存时，我希望所选客户和所选电影的相关ID存储在租赁表中。

我该怎么做？

修改

以下是我的RentalsController中的AddRental代码：

 // GET: Rentals/Create


        public ActionResult AddRental()
        {

            var vm = new RentMovieVm();
            vm.Customers = CustomerDataAccess.GetAllCustomers().Select(s => new SelectListItem { Value = s.Id.ToString(), Text = s.FirstName + " " + s.LastName }).ToList();
            vm.Movies = MoviesDataAccess.GetAllMovies().Select(x => new SelectListItem { Value = x.Id.ToString(), Text = x.Title }).ToList();
            return View(vm);
        }

        // POST: Rentals/Create

        [HttpPost]
        public ActionResult AddRental(RentMovieVm model)
        {
            var movieID = model.MovieID;
            var customerID = model.CustomerID;


            try
            {
                if (ModelState.IsValid)
                {
                    RentalsDataAccess RentalsDA = new RentalsDataAccess();

                    if (RentalsDA.AddRental(model))
                    {
                        ViewBag.Message = "Rental added successfully";
                    }
                }
                return View();
            }
            catch

            {
                return View();

            }
        }

以下是我的RentalsDataAccess类中的代码AddRental：

 public bool AddRental(RentMovieVm obj)
        {

            connection();
            SqlCommand com = new SqlCommand("AddNewRental", con);
            com.CommandType = CommandType.StoredProcedure;
            com.Parameters.AddWithValue("@CustomerID", obj.CustomerID);
            com.Parameters.AddWithValue("@MovieID", obj.MovieID);



            con.Open();
            int i = com.ExecuteNonQuery();
            con.Close();
            if (i >= 1)
            {

                return true;

            }
            else
            {

                return false;
            }


        }

EDIT2

CustomersDataAccess：

public List<Customers> GetAllCustomers()


        {
            connection();
            List<Customers> CustomerList = new List<Customers>();


            SqlCommand com = new SqlCommand("GetCustomers", con);
            com.CommandType = CommandType.StoredProcedure;
            SqlDataAdapter da = new SqlDataAdapter(com);
            DataTable dt = new DataTable();

            con.Open();
            da.Fill(dt);
            con.Close();
            foreach (DataRow dr in dt.Rows)
            {

                CustomerList.Add(

                    new Customers
                    {

                        CustomerID = Convert.ToInt32(dr["CustomerID"]),
                        FirstName = Convert.ToString(dr["FirstName"]),
                        LastName = Convert.ToString(dr["LastName"]),


                    }


                    );

            }

            return CustomerList;


        }

Answer 1

创建一个特定于此视图的视图模型。

<table border="1" data-ng-app="testModule" data-ng-controller="testController">
  <thead>
    <tr>
      <th ng-repeat="i in headerYears">{{i}}</th>
    </tr>
  </thead>
  <tbody>
    <tr >
      <td ng-repeat="i in headerYears" >{{i}}  
      <span ng-repeat="row in rows"></span> 
      <span ng-repeat="item in row.Col">{{item.Y}} </span>
      </td>     
    </tr>
  </tbody>
</table>

现在，在您的GET操作中，创建一个此对象，使用表格中的数据填充public class RentMovieVm { public List<SelectListItem> Customers { set; get;} public List<SelectListItem> Movies { set; get;} public int CustomerId { set; get;} public int MovieId { set; get;} }和Customers属性。

Movies

现在，您的视图将强烈输入此视图模型

public ActionResult Rent()
{  
  var vm = new RentMovieVm();
  vm.Customers= dbContext.Customers.Select(s=> new SelectListItem { 
                                             Value =s.CustomerId.ToString(),
                                             Text= s.FirstName+" "+ s.LastName }).ToList();
  vm.Movies= dbContext.Movies.Select(x=> new SelectListItem { 
                                               Value =x.MovieId.ToString(),
                                               Text= x.Title }).ToList();
  return View(vm);
}

现在，在您的HttpPost操作方法中，您可以使用相同的@model RentMovieVm @using(Html.Beginform()) { <label> Select a customer </label> @Html.DropDownListFor(s=>s.CustomerId, Model.Customers) <label> Select a movie </label> @Html.DropDownListFor(s=>s.MovieId, Model.Movies) <input type="submit" /> }类作为参数，因此模型绑定器将能够将发布的表单数据映射到此类对象的属性。

RentMovieVm

ASP.net MVC - 使用下拉列表

1 个答案: