LinqのDateTimeに基づくリストのフィルタレコード

Question

以下は私のリストです。datetime.ieに基づいて最新の最もトランザクションの多いブランチを検索したい：過去2ヶ月間に100の預金を持っている支店は、過去5ヶ月間に約150の預金を有する銀行へ

 List<Branches> _branches = new List<Branches> 
       { 
        new Branch 
        { 
         Id = 1, 
         Name = "Branch:1", 
         Deposits = new List<Deposit>(){ 
         new Deposit{ 
          Id=1, 
          DateOfDeposit="01/01/2016", 
          Amount=50 
         }, 
    , 
         new Deposit{ 
          Id=2, 
          DateOfDeposit="05/02/2017", 
          Price=30 
         }, 
         new Deposit{ 
          Id=3, 
          DateOfDeposit="01/01/2017", 
          Price=30 
         } 
        } 
        },continues... 

Answer 1

あなたが比較していることはできません。あなたは同時に2つの比較を変更するよう求めています。同じ基準で項目を比較することしかできません。以下のコードを使用すると、あなたが始められます。

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.Xml; 
using System.Xml.Linq; 
using System.Data; 
using System.Globalization; 


namespace ConsoleApplication1 
{ 
    class Program 
    { 
     static void Main(string[] args) 
     { 
      List<Branch> branches = new List<Branch>() { 
       new Branch() { 
        Id = 1, 
        Name = "Branch:1", 
        Deposits = new List<Deposit>(){ 
         new Deposit{ 
          Id=1, 
          DateOfDeposit = DateTime.ParseExact("01/01/2016","dd/MM/yyyy",CultureInfo.InvariantCulture), 
          Amount=50 
         }, 
         new Deposit() { 
          Id=2, 
          DateOfDeposit = DateTime.ParseExact("05/02/2017","dd/MM/yyyy",CultureInfo.InvariantCulture), 
          Amount = 30 
         }, 
         new Deposit() { 
          Id=3, 
          DateOfDeposit = DateTime.ParseExact("01/01/2017","dd/MM/yyyy",CultureInfo.InvariantCulture), 
          Amount = 30 
         } 
        } 
       }, 
       new Branch() { 
        Id = 2, 
        Name = "Branch:2", 
        Deposits = new List<Deposit>() { 
         new Deposit{ 
          Id=1, 
          DateOfDeposit = DateTime.ParseExact("01/01/2016","dd/MM/yyyy",CultureInfo.InvariantCulture), 
          Amount=50 
         }, 
         new Deposit() { 
          Id=2, 
          DateOfDeposit = DateTime.ParseExact("05/02/2017","dd/MM/yyyy",CultureInfo.InvariantCulture), 
          Amount = 30 
         }, 
         new Deposit() { 
          Id=3, 
          DateOfDeposit = DateTime.ParseExact("01/01/2017","dd/MM/yyyy",CultureInfo.InvariantCulture), 
          Amount = 30 
         } 
        } 
       } 
      }; 

      var results = branches.Select(x => new { 
       Id = x.Id, 
       month1Deposits = x.Deposits.Where(y => y.DateOfDeposit >= DateTime.Now.AddMonths(-1)).Count(), 
       month2Deposits = x.Deposits.Where(y => y.DateOfDeposit >= DateTime.Now.AddMonths(-2)).Count(), 
       month3Deposits = x.Deposits.Where(y => y.DateOfDeposit >= DateTime.Now.AddMonths(-3)).Count(), 
       month4Deposits = x.Deposits.Where(y => y.DateOfDeposit >= DateTime.Now.AddMonths(-4)).Count(), 
       month5Deposits = x.Deposits.Where(y => y.DateOfDeposit >= DateTime.Now.AddMonths(-5)).Count(), 
       month6Deposits = x.Deposits.Where(y => y.DateOfDeposit >= DateTime.Now.AddMonths(-6)).Count(), 
       month7Deposits = x.Deposits.Where(y => y.DateOfDeposit >= DateTime.Now.AddMonths(-7)).Count(), 
       month8Deposits = x.Deposits.Where(y => y.DateOfDeposit >= DateTime.Now.AddMonths(-8)).Count(), 
       month9Deposits = x.Deposits.Where(y => y.DateOfDeposit >= DateTime.Now.AddMonths(-8)).Count(), 
       month10Deposits = x.Deposits.Where(y => y.DateOfDeposit >= DateTime.Now.AddMonths(-10)).Count(), 
       month11Deposits = x.Deposits.Where(y => y.DateOfDeposit >= DateTime.Now.AddMonths(-11)).Count(), 
       month12Deposits = x.Deposits.Where(y => y.DateOfDeposit >= DateTime.Now.AddMonths(-12)).Count() 
      }).ToList(); 

     } 
    } 
    public class Branch 
    { 
     public int Id { get; set;} 
     public string Name { get; set;} 
     public List<Deposit> Deposits { get; set;} 

    } 
    public class Deposit 
    { 
     public int Id { get; set;} 
     public DateTime DateOfDeposit { get; set;} 
     public int Amount { get; set;} 
    } 

}