按三个字段对IEnumerable <type>进行排序

Question

我已经定义了如下类型:

public class myType
{
    public string firstName { get; set; }
    public string middleName { get; set; }
    public string lastName { get; set; }
}

我有一个IEnumerable<myType>.

我想使用.OrderBy()extention来对myType列表进行排序,如下所示.

对象应按姓氏排序.如果姓氏相同,则应按名字顺序排列.如果名字相同,则应按中间名排序.

我该怎么做呢？

Answer 1

var qry = items.OrderBy(x => x.lastName).ThenBy(x => x.firstName)
    .ThenBy(x => x.middleName);

或者在LINQ语法中:

var qry = from x in items
          orderby x.lastName, x.firstName, x.middleName
          select x;

Answer 2

myList.OrderBy(t => t.lastName).ThenBy(t => t.firstName).ThenBy(t => t.middleName)

此外,每个OrderBy并ThenBy有一个Descending版本,所以OrderByDescending并ThenByDescending