Question

我是ASP.Net MVC的新手。我有三个模型Employee，Address，Store。结构如下......

EMPLOYEE:-
    EmpID(PK), EmpName, Rank, StoreID, AddID
STORE:-
    StoreID(pk), BranchName, AddID
ADDRESS:-
    AddId(pk), Address, Phone, ID(fk EMPLOYEE.EmpID, fk STORE.StoreID)

如何在一个控制器中使用所有三个模型以及如何在控制器中执行CRUD操作。在Employee的视图中，我想显示所有三个模型的所有字段，例如

EmpID, EmpName, Rank, Store.BranchName, Address, Phone

当我在视图中更新这些字段时，应更新所有模型。我知道如何使用多个模型而没有它们之间的关系。感谢。

Answer 1

这是视图模型派上用场的地方。它允许您将数据库层字段和逻辑与表示层字段分开。

您可以组合多个数据库实体，只展示您希望在前端显示的每个元素。

例如，您可以将视图模型定义为：

public class EmployeeInfo
{
    public string EmployeeName {get;set;}
    // other properties

    public EmployeeInfo(Employee emp, Store store, Address address)
    {
        EmployeeName = emp.EmpName;
        // assign other properties
    }
}

然后，在控制器中，您可以创建视图模型并将其传递给视图：

public class EmployeeController
{
     public IActionResult Index()
     {
         var empInfo = new EmployeeInfo(employee, store, address); // retrieved from database somehow
         return View(empInfo);
     }
}

然后，您的视图可以引用视图模型并像平常一样使用属性。

Answer 2

员工与地址有关系＆amp;店，

<强>模型

 namespace Tester.Models
{
    public class EMPLOYEEVIEWMODEL
    {
        public int EmpID { get; set; }
        public string EmpName { get; set; }
        public int Rank { get; set; }
        public ADDRESSVIEWMODEL Address { get; set; }
        public STOREVIEWMODEL Store { get; set; }

    }

    public class STOREVIEWMODEL
    {
        public int StoreID { get; set; }
        public string BranchName { get; set; }       
    }
    public class ADDRESSVIEWMODEL
    {
        public int AddId { get; set; }
        public string Address { get; set; }
        public string Phone { get; set; }        
    }

}

<强>控制器

namespace Tester.Controllers
{
    public class EmployeeController : Controller
    {
        //
        // GET: /Employee/

        public ActionResult Add()
        {
            return View();
        }

    }
}

查看

@using Tester.Models; @model EMPLOYEEVIEWMODEL @{ Layout = null; } <!DOCTYPE html> <html> <head> <meta name="viewport" content="width=device-width" /> <title>Add</title> </head> <body> @using (Html.BeginForm()) { @Html.AntiForgeryToken() <div class="form-group"> @Html.LabelFor(model => model.EmpName, htmlAttributes: new { @class = "control-label col-md-4" }) <div class="col-md-4"> @Html.TextAreaFor(model => model.EmpName, new { @class = "form-control input-sm" }) @Html.ValidationMessageFor(model => model.EmpName, "", new { @class = "help-block" }) </div> </div> <div class="form-group"> @Html.LabelFor(model => model.Rank, htmlAttributes: new { @class = "control-label col-md-4" }) <div class="col-md-4"> @Html.TextAreaFor(model => model.Rank, new { @class = "form-control input-sm" }) @Html.ValidationMessageFor(model => model.Rank, "", new { @class = "help-block" }) </div> </div> <div class="form-group"> @Html.LabelFor(model => model.Store.BranchName, htmlAttributes: new { @class = "control-label col-md-4" }) <div class="col-md-4"> @Html.TextAreaFor(model => model.Store.BranchName, new { @class = "form-control input-sm" }) @Html.ValidationMessageFor(model => model.Store.BranchName, "", new { @class = "help-block" }) </div> </div>} <div class="form-group"> @Html.LabelFor(model => model.Address.Address, htmlAttributes: new { @class = "control-label col-md-4" }) <div class="col-md-4"> @Html.TextAreaFor(model => model.Address.Address, new { @class = "form-control input-sm" }) @Html.ValidationMessageFor(model => model.Address.Address, "", new { @class = "help-block" }) </div> </div> <div class="form-group"> @Html.LabelFor(model => model.Address.Phone, htmlAttributes: new { @class = "control-label col-md-4" }) <div class="col-md-4"> @Html.TextAreaFor(model => model.Address.Phone, new { @class = "form-control input-sm" }) @Html.ValidationMessageFor(model => model.Address.Phone, "", new { @class = "help-block" }) </div> </div> <input id="Submit" type="submit" value="submit" /> </body> </html>

请仔细研究这个＆amp;让我知道您的反馈

Answer 3

使用动态模型

模型

public class Teacher
{
  public int TeacherId { get; set; }
  public string Code { get; set; }
  public string Name { get; set; }
} 

public class Student
{
  public int StudentId { get; set; }
  public string Code { get; set; }
  public string Name { get; set; }
  public string EnrollmentNo { get; set; }
}


 Controller Code

 public class HomeController : Controller
 {
     public ActionResult Index()
     {
        ViewBag.Message = "Welcome to my demo!";
        dynamic mymodel = new ExpandoObject();
        mymodel.Teachers = GetTeachers();
        mymodel.Students = GetStudents();
        return View(mymodel);
     }
 }

我们可以使用@model动态关键字将我们的模型定义为动态（不是强类型模型）。

View Code

   @using MultipleModelInOneView;

   @model dynamic

   @{

     ViewBag.Title = "Home Page";

   }

   <h2>@ViewBag.Message</h2>



    <p><b>Teacher List</b></p>



   <table>

   <tr>

    <th>Id</th>

    <th>Code</th>

    <th>Name</th>

</tr>

@foreach (Teacher teacher in Model.Teachers)

{

    <tr>

        <td>@teacher.TeacherId</td>

        <td>@teacher.Code</td>

        <td>@teacher.Name</td>

    </tr>

}

学生列表

ID 码名称报名号 @foreach（Model.Students的学生） { @ student.StudentId @ student.Code @学生姓名 @ student.EnrollmentNo }

一个视图中的多个模型ASP.Net

3 个答案: