EF How to use context.Set and context.Entry, which ships with EF4.1 ?-白红宇

EF How to use context.Set and context.Entry, which ships with EF4.1 ?

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发布时间：2019-06-24

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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-applicationHowever, 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 EntityStateusing System.Data.Entity;using System.Linq.Expressions;  // for Expression commandusing TasPOMark4.Models;namespace TasPOMark4.Models{    public class GenericRepository
     
       where TEntity : class     {         internal TasEntities context;         internal DbSet
      
        dbSet;          public GenericRepository(TasEntities context)         {             this.context = context;             this.dbSet = context.Set
       
        ();        }          public IEnumerable
        
          Get(             Expression
         
          
           > filter = null, Func
           
            
             , IOrderedQueryable
             
              > orderBy = null, string includeProperties = "") { IQueryable
              
                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,GraemeEdited by: user4487499 on 06-May-2011 02:45Edited by: user4487499 on 06-May-2011 02:46Edited by: user4487499 on 06-May-2011 03:21