How to use generic repository pattern in mvc code first.

Anonymous User · 2015-10-26T22:19:20.467Z

Can anyone please help me how to solve this problem .



We have first created core class library project and I mentioned database model structure in master.cs.


using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Core
{
    public class UserMaster
    {
        [Key]
        [DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)]
        public int UserId { get; set; }
        public string LoginName { get; set; }
        public string password { get; set; }
        public string UserName { get; set; }
        public string ReturnUrl { get; set; 
    }
    public class CustomerProduct
    {
        [Key]
        [DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)]
        public int Id { get; set; }
        public int ProductId { get; set; }
        public decimal Price { get; set; }
        public decimal Quantity { get; set; }
        public decimal TotalAmount { get; set; }
        public virtual ProductMaster ProductMaster { get; set; }
    }
    public class ProductMaster
    {
        public ProductMaster()
        {
            CustomerProducts = new HashSet<CustomerProduct>();
        }
        [Key]
        [DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)]
        public int ProductId { get; set; }
        public string ProductName { get; set; }
        public decimal Price { get; set; }
        public int CategoryId { get; set; }
        public virtual CategotyMaster CategotyMaster { get; set; }
        public virtual ICollection<CustomerProduct> CustomerProducts { get; set; }
    }
    public class CategotyMaster
    {
        public CategotyMaster()
        {
            ProductMasters = new HashSet<ProductMaster>();
        }
        [Key]
        [DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)]
        public int CategoryId { get; set; }
        public string CategoryName { get; set; }
        public virtual ICollection<ProductMaster> ProductMasters { get; set; }
    }
}


Second  we have created data class library project and mention Repository pattern and
 codefirst entity framework .
Create IRepository interface 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Data
{
    public interface IRepository<T> where T : class
    {
        IQueryable<T> GetAll();
        void Add(T obj);
        void Delete(object Id);
        void Update(T obj);
        T GetById(object id);       
    }
}
Next create a new repository class which is implement IRepository interface .
using System;
using System.Collections.Generic;
using System.Data.Entity;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Data
{
    public class Repository<T> :IRepository<T> where T : class
    {
         private DataContext context = null;
         private DbSet<T> table = null;
         public Repository()
        {
            this.context = new DataContext();
            this.context.Configuration.ProxyCreationEnabled = false;
            table = context.Set<T>();
        }
         public Repository(DataContext context)
        {
            this.context = context;
            this.context.Configuration.ProxyCreationEnabled = false;
            table = context.Set<T>();
        }

         public IQueryable<T> GetAll()
         {
            
          return table;
         }
         public void Add(T obj)
         {
             table.Add(obj);
             context.SaveChanges();
         }
         public void Delete(object Id)
         {
             T existing = table.Find(Id);
             table.Remove(existing);
             context.SaveChanges();
         }
         public void Update(T obj)
         {
             table.Attach(obj);
             context.Entry(obj).State = EntityState.Modified;
         }
         public T GetById(object id)
         {
             return table.Find(id);       
         }
    }
}
Next create a new DataContext class which is implement entity framework.
using System;
using System.Collections.Generic;
using System.Data.Entity;
using System.Linq;
using System.Text;
using System.Threading.Tasks; 
using System.Data.Entity.ModelConfiguration;
using System.Reflection;
using System.Configuration;
using Core;
namespace Data
{
   public class DataContext : DbContext
    {
        public DataContext()
        : base(ConfigurationManager.ConnectionStrings["con"].ConnectionString)
        {            
        Database.SetInitializer<DataContext>(new CreateDatabaseIfNotExists<DataContext>());
        this.Configuration.LazyLoadingEnabled = false;
        }     

        public DbSet<ProductMaster> ProductMasters { get; set; }
        public DbSet<CustomerProduct> CustomerProducts { get; set; }
        public DbSet<CategotyMaster> CategotyMasters { get; set; }
        public DbSet<UserMaster> UserMasters { get; set; }
    }
}
Next create a new DMLRempsitory class which is set generic IRepository property.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Data;
using Core;
using System.Data.Entity;
using System.Configuration;
namespace Data
{
    public class DMLRempsitory
    {
       public IRepository<CustomerProduct> CustomerProduct {
            get
            {
               return new Repository<CustomerProduct>();
            } 
        }
        public IRepository<ProductMaster> ProductMaster {
            get
            {
                return new Repository<ProductMaster>();
            }   
        }
        public IRepository<CategotyMaster> CategotyMaster 
        { 
            get
            {
                return  new Repository<CategotyMaster>();
            }   
        }
        public IRepository<UserMaster> UserMaster
        {
            get
            {
                return new Repository<UserMaster>();
            }
        }
    }
}


Next create a new
BaseController class which is inherits Controller where we create a property of
DMLRempsitory class which is get all property.


using Data;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data.Entity;
using System.Linq;
using System.Web;
using System.Web.Mvc;
namespace ReposityPattern.Controllers
{
    public class BaseController : Controller
    {
        protected DMLRempsitory Uow { get; set; }
        public BaseController()
        {
            Uow = new DMLRempsitory();
        }
    }
}
Next create a new HomeController class which is inherits BaseController help to access all property of DMLRempsitory class.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using Data;
using Core;
using ReposityPattern.Models;
using System.Data.Entity;
namespace ReposityPattern.Controllers
{
    public class HomeController : BaseController
    {
        public ActionResult Index()
        {
            return View();
        }
        public JsonResult GetCategoty()
        {
            var Result = Uow.CategotyMaster.GetAll();
            return Json(Result, JsonRequestBehavior.AllowGet);
        }
        [HttpPost]
        public ActionResult Delete(CustomerProduct obj)
        {
            Uow.CustomerProduct.Delete(obj.Id);
            SaveChanges();
            return new EmptyResult();
        }

        public ActionResult GetProduct(int categoryId = 0)
        {
            var result = (from a in Uow.ProductMaster.GetAll().ToList()
                          where a.CategoryId == categoryId
                          select new
                          {
                              a.ProductId,
                              a.ProductName
                          });
            return Json(result, JsonRequestBehavior.AllowGet);
        }
        public ActionResult GetProductDetails(int ProductId = 0)
        {
            var result = (from a in Uow.ProductMaster.GetAll().ToList()
                          join b in
Uow.CategotyMaster.GetAll().ToList() on a.CategoryId equals b.CategoryId
                          where a.ProductId == ProductId
                          select new
                          {
                              a.ProductId,
                              a.ProductName,
                              a.Price,
                              b.CategoryId,
                              b.CategoryName
                          });
            return Json(result, JsonRequestBehavior.AllowGet);
        }
        public void Insert(IList<CustomerProduct> obj)
        {
            foreach (CustomerProduct o in obj)
            {
                Uow.CustomerProduct.Add(o)
            }
        }
    }
}

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How to use generic repository pattern in mvc code first.

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