LINQを使用して列を列に変換する方法は？

Question

すべての行を列に変換するにはどうすればよいですか？最初の列がLINQを使用して列名として生成されることを考慮してください。製品は、製品1のように、重複している場合

計算合計：

私は

YKey Year Product1 Product2 Product3 
Y1 2016 3 2 3 4 
Y2 2017 5 3 4 5 
Y3 2018 7 4 5 6 
Y4 2019 9 5 6 7 
Y5 2020 11 6 7 8 
Y6 2021 13 7 8 9 
Y7 2022 15 8 9 10 
Y8 2023 17 9 10 11 
Y9 2024 19 10 11 12 
Y10 2025 21 11 12 3 

は、私はちょうど持っているリストとして出力の下に取得する必要があります

Product  Y1 Y2 Y3 Y4 Y5 Y6 Y7 Y8 Y9 Y10 
    Product1 1 2 3 4 5 6 7 8 9 10 
    Product1 2 3 4 5 6 7 8 9 10 11 
    Product2 2 3 4 5 6 7 8 9 10 11 
    Product3 3 4 5 6 7 8 9 10 11 12 
    Product4 4 5 6 7 8 9 10 11 12 13 

リストは、データの下に含まれてい私の要件に関する明確なイメージを提供するために、4年間の製品を提供しています。 ..

に私は見ない例としてlist<class>

private List<Data> CreateColumnData() 
    { 
     var list = new List<Data>(); 

     list.Add(new Data() { ProductName = "Product1", Year1 = 1, Year2 = 2, Year3 = 3, Year4 = 4, Year5 = 5, Year6 = 6, Year7 = 7,Year8 = 8,Year9=9,Year10=10}); 
     list.Add(new Data() { ProductName = "Product2", Year1 = 2, Year2 = 3, Year3 = 4, Year4 = 5, Year5 = 6, Year6 = 7, Year7 = 8, Year8 = 9, Year9 = 10, Year10 = 11 }); 
     list.Add(new Data() { ProductName = "Product3", Year1 = 3, Year2 = 4, Year3 = 5, Year4 = 6, Year5 = 7, Year6 = 8, Year7 = 9, Year8 = 10, Year9 = 11, Year10 = 12 }); 
     list.Add(new Data() { ProductName = "Product4", Year1 = 4, Year2 = 5, Year3 = 6, Year4 = 7, Year5 = 8, Year6 = 9, Year7 = 10, Year8 = 11, Year9 = 12, Year10 = 13}); 

     return list; 
    } 
    public class Data 
{ 
    public string ProductName { get; set; } 
    public int Year1 { get; set; } 
    public int Year2 { get; set; } 
    public int Year3 { get; set; } 
    public int Year4 { get; set; } 
    public int Year5 { get; set; } 
    public int Year6 { get; set; } 
    public int Year7 { get; set; } 
    public int Year8 { get; set; } 
    public int Year9 { get; set; } 
    public int Year10 { get; set; } 
    public int Year11 { get; set; } 
    public int Year12 { get; set; } 
    public int Year13 { get; set; } 
    public int Year14 { get; set; } 
    public int Year15 { get; set; } 
} 

Answer 1

を提供してきた下よう

年であれば、現在の年間2016その後、Y1 = 2016、Y2 = 2017、現在の年から始まりますLinqのために多くの仕事、FirstOrDefaultだけ。

class Program 
{ 
    static void Main() 
    { 
     List<Data> src = CreateColumnData(); 

     // Result is a List 
     List<ResultRow> res = new List<ResultRow>(); 

     foreach (Data dd in src) { 
      for (int i = 1; i <= 15; i++) 
      { 
       String yk = "Y" + i.ToString(); 
       ResultRow r = res.FirstOrDefault(rr => rr.YK == yk); 
       if (r == null) 
       { 
        r = new ResultRow(yk, 2015 + i, 0, 0, 0, 0); 
        res.Add(r); 
       } 
       switch (dd.ProductName) 
       { 
        case "Product1": r.Product1 += dd.getYear(i); break; 
        case "Product2": r.Product2 += dd.getYear(i); break; 
        case "Product3": r.Product3 += dd.getYear(i); break; 
        case "Product4": r.Product4 += dd.getYear(i); break; 
        default: break; 
       } 
      }   
     } 

     res.All(rr => { 
      Console.WriteLine(rr.ToString()); 
      return true; }); 
     Console.ReadKey(); 
    } 

    static private List<Data> CreateColumnData() 
    { 
     var list = new List<Data>(); 

     list.Add(new Data() { ProductName = "Product1", Year1 = 1, Year2 = 2, Year3 = 3, Year4 = 4, Year5 = 5, Year6 = 6, Year7 = 7, Year8 = 8, Year9 = 9, Year10 = 10 }); 
     list.Add(new Data() { ProductName = "Product2", Year1 = 2, Year2 = 3, Year3 = 4, Year4 = 5, Year5 = 6, Year6 = 7, Year7 = 8, Year8 = 9, Year9 = 10, Year10 = 11 }); 
     list.Add(new Data() { ProductName = "Product3", Year1 = 3, Year2 = 4, Year3 = 5, Year4 = 6, Year5 = 7, Year6 = 8, Year7 = 9, Year8 = 10, Year9 = 11, Year10 = 12 }); 
     list.Add(new Data() { ProductName = "Product4", Year1 = 4, Year2 = 5, Year3 = 6, Year4 = 7, Year5 = 8, Year6 = 9, Year7 = 10, Year8 = 11, Year9 = 12, Year10 = 13 }); 

     return list; 
    } 
} 

// result POCO 
public class ResultRow 
{ 
    public string YK { get; set; } 
    public int Year { get; set; } 
    public int Product1 { get; set; } 
    public int Product2 { get; set; } 
    public int Product3 { get; set; } 
    public int Product4 { get; set; } 

    public ResultRow (string YK, int Year, int Product1, int Product2, int Product3, int Product4) 
    { 
     this.YK = YK; 
     this.Year = Year; 
     this.Product1 = Product1; 
     this.Product2 = Product2; 
     this.Product3 = Product3; 
     this.Product4 = Product4; 
    } 

    public override string ToString() { 
     return string.Format("{0},{1},{2},{3},{4},{5}", 
      YK, Year, Product1, Product2, Product3, Product4); 
    } 
} 

public class Data 
{ 
    public string ProductName { get; set; } 
    public int Year1 { get; set; } 
    public int Year2 { get; set; } 
    public int Year3 { get; set; } 
    public int Year4 { get; set; } 
    public int Year5 { get; set; } 
    public int Year6 { get; set; } 
    public int Year7 { get; set; } 
    public int Year8 { get; set; } 
    public int Year9 { get; set; } 
    public int Year10 { get; set; } 
    public int Year11 { get; set; } 
    public int Year12 { get; set; } 
    public int Year13 { get; set; } 
    public int Year14 { get; set; } 
    public int Year15 { get; set; } 

    public int getYear(int i) { 
     switch (i) { 
      case 1: return Year1; 
      case 2: return Year2; 
      case 3: return Year3; 
      case 4: return Year4; 
      case 5: return Year5; 
      case 6: return Year6; 
      case 7: return Year7; 
      case 8: return Year8; 
      case 9: return Year9; 
      case 10: return Year10; 
      case 11: return Year11; 
      case 12: return Year12; 
      case 13: return Year13; 
      case 14: return Year14; 
      case 15: return Year15; 
      default: return 0; 
     } 
    } 
}