how to sort List<T> in c# / .net

问题

I have a class PropertyDetails:

public 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.

回答1:

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.)

回答2:

Using linq you can use something similar to:

list.OrderBy(x => x.Sequence).toList();  

But I prefer to use a custom comparer.

回答3:

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<,>.

回答4:

var sortedList = propertyDetailsList.OrderBy(pd => pd.Sequence);

来源：https://stackoverflow.com/questions/4724027/how-to-sort-listt-in-c-sharp-net