/// <summary>
/// 把IOrderedQueryable[T]集合继续按指定属性排序方式进行排序
/// </summary>
/// <typeparam name="T">动态类型</typeparam>
/// <param name="source">要排序的数据集</param>
/// <param name="propertyName">排序属性名</param>
/// <param name="sortDirection">排序方向</param>
/// <returns></returns>
public static IOrderedQueryable <T> ThenBy <T>(this IOrderedQueryable <T> source, string propertyName,
ListSortDirection sortDirection = ListSortDirection.Ascending)
{
PublicHelper.CheckArgument(propertyName, "propertyName");
return(QueryableHelper <T> .ThenBy(source, propertyName, sortDirection));
}
public static IOrderedQueryable <T> ThenBy <T>(this IOrderedQueryable <T> queryable, string propertyName, bool desc)
{
return(QueryableHelper <T> .ThenBy(queryable, propertyName, desc));
}