public IOrderedSpecification <T> ThenBy <T, K>(IOrderedSpecification <T> spec, Expression <Func <T, K> > keySelector, QueryOrder order)
{
LinqSpecification <T> linqSpec = (LinqSpecification <T>)spec;
((IList <QueryOrderExpression>)linqSpec.ThenByExpressions).Add(QueryOrderExpression.CreateTheneBy(keySelector, order));
return(linqSpec);
}
public static IOrderedSpecification <TEntity> ThenBy <TEntity>(this IOrderedSpecification <TEntity> specification, IOrderSpecification <TEntity> orderSpecification)
where TEntity : class
{
if (specification == null)
{
throw new ArgumentNullException(nameof(specification));
}
return(AddOrderSpecification(specification, orderSpecification));
}
/// <summary>
/// 指定规约根据某个键按降序对序列中的元素执行后续排序。
/// </summary>
/// <typeparam name="T"></typeparam>
/// <typeparam name="K"></typeparam>
/// <param name="spec"></param>
/// <param name="keySelector"></param>
/// <returns></returns>
public static IOrderedSpecification <T> ThenByDescending <T, K>(this IOrderedSpecification <T> spec, Expression <Func <T, K> > keySelector)
{
if (spec == null)
{
throw new ArgumentNullException("spec");
}
if (keySelector == null)
{
throw new ArgumentNullException("keySelector");
}
return(spec.Provider.ThenBy(spec, keySelector, QueryOrder.Descending));
}
public IOrderedSpecification <T> ThenBy <T, K>(IOrderedSpecification <T> spec, Expression <Func <T, K> > keySelector, QueryOrder order)
{
NHibernateSpecification <T> nhSpec = (NHibernateSpecification <T>)spec;
if (order == QueryOrder.Ascending)
{
nhSpec.Query = ((IOrderedQueryable <T>)nhSpec.Query).ThenBy(keySelector);
}
else
{
nhSpec.Query = ((IOrderedQueryable <T>)nhSpec.Query).ThenByDescending(keySelector);
}
return(nhSpec);
}
public IOrderedSpecification <T> ThenBy <T, K>(IOrderedSpecification <T> spec,
Expression <Func <T, K> > keySelector, QueryOrder order)
{
IBatisNetSpecification <T> batisSpec = (IBatisNetSpecification <T>)spec;
if (order == QueryOrder.Ascending)
{
batisSpec.Query = ((IOrderedQueryable <T>)batisSpec.Query).ThenBy(keySelector);
}
else
{
batisSpec.Query = ((IOrderedQueryable <T>)batisSpec.Query).ThenByDescending(keySelector);
}
return(batisSpec);
}
public static IOrderedSpecification <TEntity> ThenBy <TEntity>(this IOrderedSpecification <TEntity> specification, IOrderSpecification <TEntity> orderSpecification)
where TEntity : class
{
return(AddOrderSpecification(specification, orderSpecification));
}