/// <summary>
/// Order an <see cref="IEnumerable{TSource}"/>
/// </summary>
/// <typeparam name="TSource"></typeparam>
/// <typeparam name="TKey"></typeparam>
/// <param name="source"></param>
/// <param name="orderitem"><see cref="IOrderItem"/></param>
/// <returns></returns>
public static IOrderedEnumerable <TSource> OrderBy <TSource, TKey>(this IEnumerable <TSource> source, OrderItem <TKey> orderitem)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
if (string.IsNullOrWhiteSpace(orderitem.SortColum))
{
throw new ArgumentException("Input cannot be null or empty", "orderitem.SortColum");
}
return(OrderByInternal.EnumerableOrder(source, orderitem, out _));
}
/// <summary>
/// Order an <see cref="IEnumerable{TSource}"/>
/// </summary>
/// <typeparam name="TSource"></typeparam>
/// <param name="source"></param>
/// <param name="sortColum">name of the column to sort on</param>
/// <param name="isDescending">Is the order direction descending</param>
/// <returns></returns>
public static IOrderedEnumerable <TSource> OrderBy <TSource>(this IEnumerable <TSource> source, string sortColum, bool isDescending)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
if (string.IsNullOrWhiteSpace(sortColum))
{
throw new ArgumentException("Input cannot be null or empty", "sortColum");
}
return(OrderByInternal.EnumerableOrder(source, new OrderItem {
SortColum = sortColum, OrderDirection = Orderby.GetOrderDirection(isDescending)
}, out _));
}
/// <summary>
/// Order an <see cref="IEnumerable{TSource}"/>
/// </summary>
/// <typeparam name="TSource"></typeparam>
/// <typeparam name="TKey"></typeparam>
/// <param name="source"></param>
/// <param name="sortColum">Comma or semicolumn seperated string expression of the colume and direction. Directon is not mandatory, if not pressend then it will be ascending</param>
/// <param name="orderDirection"><see cref="OrderDirectionEnum"/></param>
/// <param name="comparer"><see cref="IComparer{TKey}" /></param>
/// <returns></returns>
public static IOrderedEnumerable <TSource> OrderBy <TSource, TKey>(this IEnumerable <TSource> source, string sortColum, OrderDirectionEnum orderDirection, IComparer <TKey> comparer)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
if (string.IsNullOrWhiteSpace(sortColum))
{
throw new ArgumentException("Input cannot be null or empty", "sortColum");
}
return(OrderByInternal.EnumerableOrder(source, new OrderItem <TKey> {
SortColum = sortColum, OrderDirection = orderDirection, Comparer = comparer
}, out _));
}
/// <summary>
/// Order an <see cref="IEnumerable{TSource}"/>
/// </summary>
/// <typeparam name="TSource"></typeparam>
/// <param name="source"></param>
/// <param name="orderitems"><see cref="IEnumerable{IOrderItem}"/></param>
/// <returns></returns>
public static IOrderedEnumerable <TSource> OrderBy <TSource>(this IEnumerable <TSource> source, IEnumerable <IOrderItem> orderitems)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
if (!orderitems.Any())
{
throw new ArgumentNullException("orderitems");
}
if (orderitems.Any(c => string.IsNullOrWhiteSpace(c.SortColum)))
{
throw new ArgumentException("Input cannot be null or empty", "orderitems.SortColum");
}
var isOrderby = true;
var processed = false;
//Can not convert source to IOrderedQueryable
// => gives error
IOrderedEnumerable <TSource> returnOrder = null;
foreach (var orderitem in orderitems)
{
returnOrder = isOrderby
? OrderByInternal.EnumerableOrder(source, orderitem, out processed)
: OrderByInternal.EnumerableOrderThenBy(returnOrder, orderitem);
if (isOrderby && processed)
{
isOrderby = false;
}
}
return(returnOrder);
}