MVC错误 - 传递到字典的模型项的类型是“System.Collections.Generic.List` [英] MVC error - The model item passed into the dictionary is of type 'System.Collections.Generic.List`

问题描述

我也弄不清是怎么回事这个错误：

I can't figure out what's going on with this error:

传递到字典的模型项的类型是System.Collections.Generic.List1 [RepositoryExample.Employee]'，但本词典需要类型的模型项目RepositoryExample.Models.IEmployeeManagerRepository

我得到的错误，当我去到索引视图。我加了索引视图从控制器，但在它里面没有code。我使用LINQ to SQL的。

I get the error when I go to the Index view. I added the Index View from the controller but there is no code in it. I'm using Linq to SQL.

@model RepositoryExample.Models.IEmployeeManagerRepository

@{
ViewBag.Title = "Index";
}

<h2>Index</h2>

这是我的code：

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(); 
}

}

任何想法，我做错了什么？我想跟随本教程库模式的例子（http://www.asp.net/mvc/tutorials/iteration-4-make-the-application-loosely-coupled-cs）

Any ideas what I'm doing wrong? I'm trying to follow the example on Repository pattern in this tutorial (http://www.asp.net/mvc/tutorials/iteration-4-make-the-application-loosely-coupled-cs)

推荐答案

在你的 Index.cshtml 视图顶部的替换：

In the top of your Index.cshtml view replace:

@model RepositoryExample.Models.IEmployeeManagerRepository

与

@model IEnumerable<RepositoryExample.Employee>

的 _repository.ListEmployees（）方法的返回值的IEnumerable＆LT;员工＆GT; ，这就是要传递什么样的看法这里：

The _repository.ListEmployees() method returns IEnumerable<Employee> and that's what you are passing to the view here:

return View(_repository.ListEmployees());

这就是你应该在你的视图中使用了 @model 指令类型。

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