Question

我刚刚阅读了Adam Freeman的Pro ASP.NET MVC一书，作为ASP.NET MVC的介绍。

然而，我遇到了一种情况，我必须加入多个表，但是使用Freeman的方法，我无法做到。

请参阅下面的代码

EFEmployeeRepository.cs（在我的具体文件夹中）

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using HRMS.Domain.Abstract;
using HRMS.Domain.Entities;



namespace HRMS.Domain.Concrete
{
    public class EFEmployeeRepository : IEmployeesRepository
    {
        private EFDbContext context = new EFDbContext();           

        public Employee getEmployeeByID(int User_ID)
        {

            // I want to Join the Employee Table with the User Table to Get Employee Details

            Employee employee = context.Employees.FirstOrDefault(p => p.User_ID == User_ID);

            return employee;

        }
    }
}

IEmployeesRepository.cs（Absctract文件夹）

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using HRMS.Domain.Entities;


namespace HRMS.Domain.Abstract
{
    public interface IEmployeesRepository
    {

        //Get employee Details
        Employee getEmployeeByID (int User_ID);

    }
}

我需要将Employee模型与特定Employee的用户模型一起加入并将数据返回给控制器

Answer 1

 var empDetails = (from emp in Context.Employees
             join us in Context.User on emp.User_ID equals us.User_ID
             where emp.User_ID == User_ID
             select new UserDataModel
             {
               User_ID=us.User_ID,
               UserName=us.username,
               EmployeeId=emp.EmployeeId
             }).FirstOrDefault()

您的数据模型：

public class UserDataModel
{
  public int User_ID {get; set;}
  public String UserName {get; set;}
  public int EmployeeId {get; set;}
}

使用LINQ在ASP.NET MVC中编写连接查询

1 个答案: