根据订单中的值过滤列表？

Question

使用空引用检查过滤值的最简单方法是什么.Order应该像"Active","Reset","Locked","Suspended","Expired","Disabled","Revoked"

namespace ConsoleApplication1
{
    class Program
    {
        private static void Main(string[] args)
        {
            var tempList = new List<string>
            {
                "Active",
                "Reset",
                "Locked",
                "Suspended ",
                "Expired",
                "Disabled ",
                "Revoked"
            };
            var list = new List<MyEntity>
            {
                new MyEntity() {MyValue = "Reset"},
                new MyEntity() {MyValue = "Locked"},
                new MyEntity() {MyValue = "Active"},
                new MyEntity() {MyValue = "Expired"}

            };

            var item =
                list.FirstOrDefault(x => x.MyValue));

        }
    }
    public class MyEntity
    {
        public string MyValue { get; set; }
    }
}

我需要做什么才能根据值将过滤器列入清单...

Answer 1

这听起来像你想做的OrderBy,如果你想要的是Sam,然后是Paul,然后是Jimmy,那么Jeff,然后null如果没有这些,那么你可以做以下事情.

var listOfNames = new List<string> { "Sam", "Paul", "Jimmy", "Jeff" };
var item = list.Where(x => listOfNames.Contains(x.MyValue))
    .OrderyBy(x => listOfName.IndexOf(x.MyValue))
    .FirstOrDefault();

这将首先筛选出与您感兴趣的值不匹配的任何内容.然后按照他们在列表中的位置对它们进行排序,最后选择第一个或者null过滤器没有匹配.

此外,我只是假设MyValue是在string这里,但如果你需要,你可以做任何需要的转换.