Hello,
I am trying to implement a generic repository as explained on the following link :-
http://www.asp.net/entity-framework/tutorials/implementing-the-repository-and-unit-of-work-patterns-in-an-asp-net-mvc-application
However, I do not have options for context.Set or context.Entry, which Ships with EF 4.1 - is there some other way of doing it ? Please see problem code in bold below:-
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data; // for EntityState
using System.Data.Entity;
using System.Linq.Expressions; // for Expression command
using TasPOMark4.Models;
namespace TasPOMark4.Models
{
public class GenericRepository<TEntity> where TEntity : class
{
internal TasEntities context;
internal DbSet<TEntity> dbSet;
public GenericRepository(TasEntities context)
{
this.context = context;
this.dbSet = context.Set<TEntity>();
}
public IEnumerable<TEntity> Get(
Expression<Func<TEntity, bool>> filter = null,
Func<IQueryable<TEntity>, IOrderedQueryable<TEntity>> orderBy = null,
string includeProperties = "")
{
IQueryable<TEntity> query = dbSet;
if (filter != null)
{
query = query.Where(filter);
}
foreach (var includeProperty in includeProperties.Split
(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries))
{
query = query.Include(includeProperty);
}
if (orderBy != null)
{
return orderBy(query).ToList();
}
else
{
return query.ToList();
}
}
public virtual TEntity GetByID(object id)
{
return dbSet.Find(id);
}
public virtual void Insert(TEntity entity)
{
dbSet.Add(entity);
}
public virtual void Delete(object id)
{
TEntity entityToDelete = dbSet.Find(id);
Delete(entityToDelete);
}
public virtual void Delete(TEntity entityToDelete)
{
*//below Context.Entry does not exist*
*//if (context.Entry(entityToDelete).State == EntityState.Detached)*
*//if(context.ObjectStateManager.GetObjectStateEntry(entityToDelete) == EntityState.Detached)*
*//{* dbSet.Attach(entityToDelete);
//}
dbSet.Remove(entityToDelete);
}
public virtual void Update(TEntity entityToUpdate)
{
dbSet.Attach(entityToUpdate);
*//context.Entry does not exist*
*//context.Entry(entityToUpdate).State = EntityState.Modified;*
// GR skinning a cat (06/05/2011)
context.ObjectStateManager.ChangeObjectState(entityToUpdate, EntityState.Modified); }
}
}
As you can see directly above, I have attempted to use context.ObjectStateManager.ChangeObjectState - is this correct ?
Many thanks in advance for any help someone can provide,
Graeme
Edited by: user4487499 on 06-May-2011 02:45
Edited by: user4487499 on 06-May-2011 02:46
Edited by: user4487499 on 06-May-2011 03:21
