分享一个基于EF5.0封装的BaseDAL

 public class BaseDAL<T> where T : class,new()
 {
     protected DbContext dbContext = DbContextFactory.GetCurrentDbContext();

     protected DbSet<T> dbSet
     {
         get
         {
             return dbContext.Set<T>();
         }
     }

     protected bool SaveChanges()
     {
         return dbContext.SaveChanges() > ;
     }

     protected T Add(T entity)
     {
         entity = dbSet.Attach(entity);
         dbContext.Entry<T>(entity).State = EntityState.Added;//dbSet.Add(entity);
         return entity;
     }

     protected void Delete(T entity)
     {
         dbContext.Entry<T>(entity).State = EntityState.Deleted;
     }

     protected void Update(T entity)
     {
         dbContext.Entry<T>(entity).State = EntityState.Modified;
     }

     protected T Select(Func<T, bool> whereLambda)
     {
         return dbSet.Where<T>(whereLambda).FirstOrDefault();
     }

     protected List<T> SelectList(Func<T, bool> whereLambda)
     {
         return dbSet.Where<T>(whereLambda).ToList();
     }

     protected List<T> SelectPageList<s>(int pageIndex, int pageSize, out int totalCount, Func<T, bool> whereLambda, Func<T, s> orderLambda, bool isAsc)
     {
         IEnumerable<T> enumerableList = dbSet.Where<T>(whereLambda);
         totalCount = enumerableList.Count();
         if (isAsc)
         {
             enumerableList = dbSet.Where<T>(whereLambda).OrderBy<T, s>(orderLambda).Skip<T>(pageSize * (pageIndex - )).Take<T>(pageSize);
         }
         else
         {
             enumerableList = dbSet.Where<T>(whereLambda).OrderByDescending<T, s>(orderLambda).Skip<T>(pageSize * (pageIndex - )).Take<T>(pageSize);
         }
         return enumerableList.ToList();
     }
 }

BaseDAL

 public class DbContextFactory
 {
     public static DbContext GetCurrentDbContext()
     {
         DbContext dbContext = (DbContext)CallContext.GetData("dbContext");
         if (dbContext == null)
         {
             dbContext = new jxcContext();
             CallContext.SetData("dbContext", dbContext);
         }
         return dbContext;
     }
 }

DbContextFactory