Question

这是一个示例代码，我希望以这种方式按照降序排列TotalCharge属性的排序数据。

//List<RateStatus> SortedList =  objListOrder.OrderByDescending(o=>o.TotalCharge).ToList();

请参阅下面的代码并指导我如何在desending中对TotalCharge属性进行排序。感谢

static class Program
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            List<RateStatus> oRateCollection = new List<RateStatus>();
            RateStatus oRateStatus = new RateStatus();

            oRateStatus.StatusMsg = "Ok";
            oRateStatus.ErrorMsg = "None";
            oRateStatus.RateDetails.Add(new RateDetails()
            {
                CurrentcyCode = "GBP",
                TotalCharge = 20

            });

            oRateCollection.Add(oRateStatus);

           // i want something like this below
           //List<RateStatus> SortedList =  objListOrder.OrderByDescending(o=>o.TotalCharge).ToList();
        }
    }

    public class RateStatus
    {
        public RateStatus()
        {
            RateDetails = new List<RateDetails>();
        }

        public string StatusMsg
        {
            get;
            set;
        }

        public string ErrorMsg
        {
            get;
            set;
        }

        public List<RateDetails> RateDetails
        {
            get;
            set;
        }
    }

    public class RateDetails
    {
        public string ServiceCode
        {
            get;
            set;
        }

        public string ServiceName
        {
            get;
            set;
        }

        public string CurrentcyCode
        {
            get;
            set;
        }

        public double TotalCharge
        {
            get;
            set;
        }

    }

这种方式已被排序。

oRateStatus.RateDetails.Sort(new RateStatusComparer());
oRateCollection.Add(oRateStatus);


public class RateStatusComparer : IComparer<RateDetails>
    {
        public int Compare(RateDetails x, RateDetails y)
        {
            if (x.TotalCharge > y.TotalCharge) return -1;
            else if (x.TotalCharge < y.TotalCharge) return 1;
            else return 0;
        }
    }

感谢

Answer 1

以下是代码

由于总费用是一个数值，我们可以使用Min和Max方法进行排序。

降序：

List<RateStatus> SortedList = oRateCollection.OrderByDescending(o => o.RateDetails.Max(r => r.TotalCharge)).ToList();

Answer 2

创建一个实现IComparer<RateStatus>的类。

例如，像这样：

public class RateStatusComparer: IComparer<RateStatus>
{
    public int Compare(RateStatus x, RateStatus y)
    {
        ... your comparing code here
    }
}

然后你可以使用List.Sort的重载并提供你的比较器

var с = new RateStatusComparer();
objListOrder.Sort(c);

有关详细信息，请参阅MSDN。

如何为特定案例排序列表c＃

这种方式已被排序。

2 个答案: