public static bool IsSortable(Type enumType, out SortableAttribute.SortAlgorithm algorithm)
{
algorithm = SortableAttribute.SortAlgorithm.None;
if (enumType.GetCustomAttributes(false).Length > 0)
{
foreach (object o in enumType.GetCustomAttributes(false))
{
if (o.GetType() == typeof(SortableAttribute))
{
algorithm = ((SortableAttribute)o).Algorithm;
return(true);
}
}
}
return(false);
}
private static IEnumerable <KeyValue> Sort(IEnumerable <KeyValue> collection, SortableAttribute.SortAlgorithm algoritm)
{
switch (algoritm)
{
case SortableAttribute.SortAlgorithm.AlphabeticallyOnly:
return(collection.OrderBy(m => m.Key));
case SortableAttribute.SortAlgorithm.BySortValueAndThenAlphabetically:
return(collection
.OrderBy(n => n.Sortvalue ?? Convert.ToInt32(n.Value))
.ThenBy(n => n.Key));
case SortableAttribute.SortAlgorithm.BySortValue:
return(collection.Select(m => new KeyValue()
{
Default = m.Default,
Key = m.Key,
Value = m.Value,
Sortvalue = m.Sortvalue ?? Convert.ToInt32(m.Value),
Groups = m.Groups
})
.OrderBy(n => n.Sortvalue));
;
default: //SortableAttribute.SortAlgorithm.None
return(collection);
}
}
public static bool IsSortable <T>(out SortableAttribute.SortAlgorithm algorithm)
where T : System.Enum
{
return(IsSortable(typeof(T), out algorithm));
}