C# 自定义排序

/// <summary>
/// 实体
/// </summary>
public class Product
{
public int ID { get; set; }
public string Name { get; set; }
public decimal Price { get; set; }
public DateTime PublishDate { get; set; }
}
/// <summary>
/// 实体集合
/// </summary>
public class PrductList
{
public List<Product> Books { get; set; }
}

//一个排序依据枚举：
public enum ComparisonType
{
Price, PublishDate
}

//一个排序基类，实现具体排序
public class BookComparison : IComparer<Product>
{
private ComparisonType type;

public BookComparison(ComparisonType type)
{
this.type = type;
}

public int Compare(Product x, Product y)
{
int order = 0;
switch (this.type)
{
case ComparisonType.Price:
order = y.Price.CompareTo(x.Price);//更换x和y的顺序可以实现升序或者降序功能
break;
case ComparisonType.PublishDate:
order = y.PublishDate.CompareTo(x.PublishDate);//更换x和y的顺序可以实现升序或者降序功能
break;
default:
break;
}
int d = order;
return order;
}
}
public class MyTest
{
public void test()
{
PrductList list = new PrductList();
List<Product> Books = new List<Product>();
list.Books = Books;
list.Books.Add(new Product()
{
ID = 1,
Name = "LiSi",
Price = 12.5M,
PublishDate = DateTime.Parse("2016-06-03")
});
list.Books.Add(new Product()
{
ID = 1,
Name = "Zhangsan",
Price = 12.8M,
PublishDate = DateTime.Parse("2016-06-05")
});
list.Books.Add(new Product()
{
ID = 1,
Name = "Wangwu",
Price = 11.5M,
PublishDate = DateTime.Parse("2016-06-01")
});
list.Books.Sort(new BookComparison(ComparisonType.Price).Compare);
foreach (var item in list.Books)
{
Console.WriteLine(string.Format("{0}:{1}, {2}", item.Name, item.Price, item.PublishDate.ToString()));
}
}
}