TechnoTips : Part 59 - Display Record using repository pattern

In this tutorial, You will learn about how to perform CRUD operation(Read) over generic repository

So far, we were creating several Layers but now we will see how the actual repository get setup so that we can use its predefined methods without doing any change into this. In other words, making repository more generic.

Lets have a quick review of all layers that we created in previous tutorial.

1. Web Layer is your MVC web Project
2. Business Layer consist the CRUD operation, gets data from Data Access Layer, Manipulate them and finally returns data to the Controller ( Web Layer)
3. Domain Layer consist the Domain Models or Classes that hold the data coming from Data Access Layer. Both Web and Business Layer can use domain models to exchange data.
4. Data Access Layer consist the generic repository methods (generic CRUD operation), Unit of Work( Database Context) and NON Generic repository( User defined repository).

Step 1: Please watch Part 58 (Setup generic repository) before moving to step 2Step 2 : Add EmployeeRepository class into your Repository Layer (MVCTutorial.Repository) and use below code

A. EmployeeRepository .cs

using MVCTutorial.Repository.Infrastructure;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MVCTutorial.Repository
{
    public class EmployeeRepository:BaseRepository<Employee>
    {
        public EmployeeRepository(IUnitOfWork unitOfWork) : base(unitOfWork) { }

    }
}

Step 2 : In EmployeeBusiness.cs (MVCTutorial.Business layer) class use below code

B. EmployeeBusiness.cs

using MVCTutorial.Business.Interface;
using MVCTutorial.Domain;
using MVCTutorial.Repository;
using MVCTutorial.Repository.Infrastructure;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MVCTutorial.Business
{
    public class EmployeeBusiness : IEmployeeBusiness
    {
        private readonly IUnitOfWork unitOfWork;
        private readonly EmployeeRepository empRepository;

        public EmployeeBusiness(IUnitOfWork _unitOfWork)
        {

            unitOfWork = _unitOfWork;
            empRepository = new EmployeeRepository(unitOfWork);
        }
             

        #region

        public List<EmployeeDomainModel> GetAllEmployee()
        {
            List<EmployeeDomainModel> list = empRepository.GetAll().Select(m => new EmployeeDomainModel { Name = m.Name, DepartmentName = m.Department.DepartmentName, Address = m.Address }).ToList();

            return list;
        }

        #endregion

    }
}

Step 4 : Call this method in your controller
Step 5 : You are done

What Next => In next tutorial we will learn about how to perform Add Edit operation over Generic Repository

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Tuesday, August 28, 2018

Part 59 - Display Record using repository pattern - CRUD

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