asp.net-mvc - MVC 错误 - 传递到字典中的模型项的类型为 'System.Collections.Generic.List`

Question

我无法弄清楚这个错误是怎么回事:

The model item passed into the dictionary is of type 'System.Collections.Generic.List1[RepositoryExample.Employee]', but this dictionary requires a model item of type 'RepositoryExample.Models.IEmployeeManagerRepository'.`

当我进入索引 View 时，出现错误。我从 Controller 添加了索引 View ，但其中没有代码。我正在使用 Linq to SQL。

@model RepositoryExample.Models.IEmployeeManagerRepository

@{
ViewBag.Title = "Index";
}

<h2>Index</h2>

这是我的代码:

EmployeeController.cs

    // GET: /Employee/
    public ActionResult Index()
    {
        return View(_repository.ListEmployees());
    }

LinqEmployeeManagerRepository.cs

public class LinqEmployeeManagerRepository: RepositoryExample.Models.IEmployeeManagerRepository
{
    private DeptDirectoryDataClassesDataContext _db = new DeptDirectoryDataClassesDataContext();

    public Employee GetEmployee(string UserName)
    {
        return (from e in _db.Employees where e.UserName == UserName select e).FirstOrDefault();
    }

    public IEnumerable<Employee> ListEmployees()
    {
        return _db.Employees.ToList();
    }

    public Employee CreateEmployee(Employee employeeToCreate)
    {
        _db.Employees.InsertOnSubmit(employeeToCreate);
        _db.SubmitChanges();
        return employeeToCreate; 
    }

    public Employee EditEmployee(Employee employeeToEdit)
    { 
        var OriginalEmployee = GetEmployee(employeeToEdit.UserName);
        _db.Employees.Attach(employeeToEdit, OriginalEmployee);
        _db.SubmitChanges();
        return employeeToEdit; 
    }

    public void DeleteEmployee(Employee employeeToDelete)
    {
        var OriginalEmployee = GetEmployee(employeeToDelete.UserName);
        _db.Employees.DeleteOnSubmit(OriginalEmployee);
        _db.SubmitChanges();     
    }
}

IEmployeeManagerRepository.cs

namespace RepositoryExample.Models
{
    public interface IEmployeeManagerRepository
    {
        Employee CreateEmployee(Employee employeeToCreate);
        void DeleteEmployee(Employee employeeToDelete);
        Employee EditEmployee(Employee employeeToUpdate);
        Employee GetEmployee(string UserName);
        IEnumerable<Employee> ListEmployees(); 
    }
}

你知道我做错了什么吗？我尝试遵循本教程中存储库模式的示例:http://www.asp.net/mvc/tutorials/iteration-4-make-the-application-loosely-coupled-cs .

Answer 1

在你的Index.cshtml的顶部查看替换:

@model RepositoryExample.Models.IEmployeeManagerRepository

与:

@model IEnumerable<RepositoryExample.Employee>

_repository.ListEmployees()方法返回 IEnumerable<Employee>这就是您要传递给此处 View 的内容:

return View(_repository.ListEmployees());

这就是您应该在 @model 中使用的类型在您看来是指令。