how to sort List<T> in c# / .net
I have a class PropertyDetails
:
开发者_如何学Pythonpublic class PropertyDetails
{
public int Sequence { get; set; }
public int Length { get; set; }
public string Type { get; set; }
}
I am creating a list of PropertyDetails
as
List<PropertyDetails> propertyDetailsList=new List<PropertyDetails>();
I want to sort this list by PropertyDetails.Sequence
.
Linq solutions are welcome.
If you want to sort the existing list in-place then you can use the Sort
method:
List<PropertyDetails> propertyDetailsList = ...
propertyDetailsList.Sort((x, y) => x.Sequence.CompareTo(y.Sequence));
If you want to create a new, sorted copy of the list then you can use LINQ's OrderBy
method:
List<PropertyDetails> propertyDetailsList = ...
var sorted = propertyDetailsList.OrderBy(x => x.Sequence).ToList();
(And if you don't need the results as a concrete List<T>
then you can omit the final ToList
call.)
Don't ever use non-generic collections in C# when you can use generics instead. There are a lot of reasons to use generic collections only (except for very special cases).
See this question for more info: When would you not use Generic Collections?
So you can use List<PropertyDetails>
(which I believe exposes a Sort()
method) or SortedList<,>
.
Using linq you can crate a new sorted list:
list.OrderBy(x => x.Sequence).ToList();
If you want to sort your current list, you can use a comparer:
list.Sort((details1, details2) => details1.Sequence.CompareTo(details2.Sequence);
var sortedList = propertyDetailsList.OrderBy(pd => pd.Sequence);
精彩评论