public List <Car> GetAll(Expression <Func <Car, bool> > filter = null)
{
using (CarContext context = new CarContext())
{
return(filter == null
? context.Set <Car>().ToList()
: context.Set <Car>().Where(filter).ToList());
}
}
public Car Get(Expression <Func <Car, bool> > filter)
{
using (CarContext context = new CarContext())
{
return(context.Set <Car>().SingleOrDefault(filter));
}
}
public TEntity Add(TEntity entity)
{
if (entity == null)
{
throw new ArgumentNullException(nameof(entity));
}
_context.Set <TEntity>().Add(entity);
return(entity);
}
/// <summary>
/// Gets all entity records with included entities
/// </summary>
/// <param name="includes">included entities</param>
/// <returns>IQueryable of all entity records with included entities, if includes is null this function is equal GetAll</returns>
public IQueryable <TEntity> Query(params Expression <Func <TEntity, object> >[] includes)
{
DbSet <TEntity> dbSet = context.Set <TEntity>();
IQueryable <TEntity> query = dbSet;
foreach (var include in includes)
{
query = query.Include(include);
}
return(query ?? dbSet);
}
public GenericRepositiory(CarContext context)
{
_context = context;
_dbSet = context.Set <T>();
}
public Repository(CarContext _context)
{
context = _context;
dbEntities = context.Set <TEntity>();
}
/// <summary>
/// IQueryable延迟加载集合，调用时才会去加载至内存
/// List查询后会立即加载至内存中
/// </summary>
/// <returns></returns>
public IQueryable <T> GetEntitys(Expression <Func <T, bool> > lambdaWhere)
{
//context.UserInfoes.Where(lambdaWhere);
return(context.Set <T>().Where(lambdaWhere));
}