Question

所以我有三个清单：

// Members stores all non-sorted member objects
var Members = new List<Member>();

// Years stores all the expected graduation years I want to compare
var Years = new List<int>();

// Sorted will contain all of the members that have a matching year
var Sorted = new List<Member>();

我正在使用foreach循环对这些值进行排序

foreach (var m in Members)
{
    foreach (var y in Years)
    {
       if (m.ExpectedGraduationYear == y)
       {
           Sorted.Add(m);
       }
    }
}

有没有办法将其压缩成单个linq语句？

Answer 1

您可以使用此类LINQ查询：

Sorted = (from m in Members
         join y in Years
         on m.ExpectedGraduationYear equals y
         select m).ToList();

Answer 2

Members.Where(m => Years.Contains(m.ExpectedGraduationYear)).ToList()

Answer 3

这样的事情：

var Sorted = (from m in Members 
              from y in Years 
              where m.ExpectedGraduationYear == y select m).ToList();

Answer 4

是的，就像这样：

{{1}}

Answer 5

var Sorted = (from m in Members from y in Years.Where(y => m.ExpectedGraduationYear == y)
                              select m).ToList();

将foreach循环压缩为linq语句

5 个答案: