Tuple<T1,T2,T3,T4,T5,T6,T7,TRest>.Item2 Özellik

Başvuru

Tanım

Ad Alanı:: System

Bütünleştirilmiş Kod:: System.Runtime.dll

Bütünleştirilmiş Kod:: mscorlib.dll

Bütünleştirilmiş Kod:: netstandard.dll

Önemli

Bazı bilgiler ürünün ön sürümüyle ilgilidir ve sürüm öncesinde önemli değişiklikler yapılmış olabilir. Burada verilen bilgilerle ilgili olarak Microsoft açık veya zımni hiçbir garanti vermez.

Geçerli Tuple<T1,T2,T3,T4,T5,T6,T7,TRest> nesnenin ikinci bileşeninin değerini alır.

public:
 property T2 Item2 { T2 get(); };

public T2 Item2 { get; }

member this.Item2 : 'T2

Public ReadOnly Property Item2 As T2

Özellik Değeri

T2

Geçerli Tuple<T1,T2,T3,T4,T5,T6,T7,TRest> nesnenin ikinci bileşeninin değeri.

Örnekler

Aşağıdaki örnek, Detroit şehri, Michigan için 1860-2000 arasındaki nüfus verilerini içeren 17 kayıt düzenli bir nesne oluşturur. 17 tanımlama grubunun ikinci bileşeni, veri serisinin ilk yılıdır. Örnek, özelliğinin Item2 değerini bir değişkene atar ve ardından verileri görüntülenen yılı temsil etmek için bu değişkeni kullanır.

using System;

class Example
{
    static void Main(string[] args)
    {
        Tuple<int, int, int> from1980 = Tuple.Create(1203339, 1027974, 951270);
        var from1910 = new Tuple<int, int, int, int, int, int, int, Tuple<int, int, int>> 
            (465766, 993078, 1568622, 1623452, 1849568, 1670144, 1511462, from1980);
        var population = new Tuple<string, int, int, int, int, int, int,
            Tuple<int, int, int, int, int, int, int, Tuple<int, int, int>>> 
            ("Detroit", 1860, 45619, 79577, 116340, 205876, 285704, from1910);

        Console.WriteLine("Population of {0}", population.Item1);
        Console.WriteLine();
        Console.WriteLine("{0,5}  {1,14}  {2,10}", "Year", "Population", "Change");

        int year = population.Item2;
        ShowPopulation(year, population.Item3);
        year += 10;
        ShowPopulationChange(year, population.Item4, population.Item3);
        year += 10;
        ShowPopulationChange(year, population.Item5, population.Item4);
        year += 10;
        ShowPopulationChange(year, population.Item6, population.Item5);
        year += 10;
        ShowPopulationChange(year, population.Item7, population.Item6);
        year += 10;
        ShowPopulationChange(year, population.Rest.Item1, population.Item7);
        year += 10;
        ShowPopulationChange(year, population.Rest.Item2, population.Rest.Item1);
        year += 10;
        ShowPopulationChange(year, population.Rest.Item3, population.Rest.Item2);
        year += 10;
        ShowPopulationChange(year, population.Rest.Item4, population.Rest.Item3);
        year += 10;
        ShowPopulationChange(year, population.Rest.Item5, population.Rest.Item4);
        year += 10;
        ShowPopulationChange(year, population.Rest.Item6, population.Rest.Item5);
        year += 10;
        ShowPopulationChange(year, population.Rest.Item7, population.Rest.Item6);
        year += 10;
        ShowPopulationChange(year, population.Rest.Rest.Item1, population.Rest.Item7);
        year += 10;
        ShowPopulationChange(year, population.Rest.Rest.Item2, population.Rest.Rest.Item1);
        year += 10;
        ShowPopulationChange(year, population.Rest.Rest.Item3, population.Rest.Rest.Item2);
    }

    private static void ShowPopulationChange(int year, int newPopulation, int oldPopulation)
    {
        Console.WriteLine("{0,5}  {1,14:N0}  {2,10:P2}", year, newPopulation,
                          ((double)(newPopulation - oldPopulation) / oldPopulation) / 10);
    }

    private static void ShowPopulation(int year, int newPopulation)
    {
        Console.WriteLine("{0,5}  {1,14:N0}  {2,10:P2}", year, newPopulation, "n/a");
    }
}
// The example displays the following output:
//
//    Population of Detroit
//    Year      Population      Change
//    1860          45,619         n/a
//    1870          79,577      7.44 %
//    1880         116,340      4.62 %
//    1890         205,876      7.70 %
//    1900         285,704      3.88 %
//    1910         465,766      6.30 %
//    1920         993,078     11.32 %
//    1930       1,568,622      5.80 %
//    1940       1,623,452      0.35 %
//    1950       1,849,568      1.39 %
//    1960       1,670,144     -0.97 %
//    1970       1,511,462     -0.95 %
//    1980       1,203,339     -2.04 %
//    1990       1,027,974     -1.46 %
//    2000         951,270     -0.75 %

let showPopulation year newPopulation =
    printfn $"""{year,5}  {newPopulation,14:N0}  {"n/a",10:P2}"""

let showPopulationChange year newPopulation oldPopulation =
    printfn $"{year,5}  {newPopulation,14:N0}  {(double (newPopulation - oldPopulation) / oldPopulation) / 10.,10:P2}"

let from1980 = Tuple.Create(1203339, 1027974, 951270)
let from1910 = new Tuple<int, int, int, int, int, int, int, Tuple<int, int, int>>(465766, 993078, 1568622, 1623452, 1849568, 1670144, 1511462, from1980)
let population = new Tuple<string, int, int, int, int, int, int, Tuple<int, int, int, int, int, int, int, Tuple<int, int, int>>>("Detroit", 1860, 45619, 79577, 116340, 205876, 285704, from1910)
printfn $"Population of {population.Item1}\n"
printfn "%5s  %14s  %10s" "Year" "Population" "Change"

do
    let year = population.Item2
    showPopulation year population.Item3
    let year = year + 10
    showPopulationChange year population.Item4 population.Item3
    let year = year + 10
    showPopulationChange year population.Item5 population.Item4
    let year = year + 10
    showPopulationChange year population.Item6 population.Item5
    let year = year + 10
    showPopulationChange year population.Item7 population.Item6
    let year = year + 10
    showPopulationChange year population.Rest.Item1 population.Item7
    let year = year + 10
    showPopulationChange year population.Rest.Item2 population.Rest.Item1
    let year = year + 10
    showPopulationChange year population.Rest.Item3 population.Rest.Item2
    let year = year + 10
    showPopulationChange year population.Rest.Item4 population.Rest.Item3
    let year = year + 10
    showPopulationChange year population.Rest.Item5 population.Rest.Item4
    let year = year + 10
    showPopulationChange year population.Rest.Item6 population.Rest.Item5
    let year = year + 10
    showPopulationChange year population.Rest.Item7 population.Rest.Item6
    let year = year + 10
    showPopulationChange year population.Rest.Rest.Item1 population.Rest.Item7
    let year = year + 10
    showPopulationChange year population.Rest.Rest.Item2 population.Rest.Rest.Item1
    let year = year + 10
    showPopulationChange year population.Rest.Rest.Item3 population.Rest.Rest.Item2

// The example displays the following output:
//
//    Population of Detroit
//    Year      Population      Change
//    1860          45,619         n/a
//    1870          79,577      7.44 %
//    1880         116,340      4.62 %
//    1890         205,876      7.70 %
//    1900         285,704      3.88 %
//    1910         465,766      6.30 %
//    1920         993,078     11.32 %
//    1930       1,568,622      5.80 %
//    1940       1,623,452      0.35 %
//    1950       1,849,568      1.39 %
//    1960       1,670,144     -0.97 %
//    1970       1,511,462     -0.95 %
//    1980       1,203,339     -2.04 %
//    1990       1,027,974     -1.46 %
//    2000         951,270     -0.75 %

Module Example
    Sub Main()
        Dim from1980 As Tuple(Of Integer, Integer, Integer) =
            Tuple.Create(1203339, 1027974, 951270)
        Dim from1910 As New Tuple(Of Integer, Integer, Integer, Integer, Integer, Integer, Integer, _
            Tuple(Of Integer, Integer, Integer)) _
            (465766, 993078, 1568622, 1623452, 1849568, 1670144, 1511462, from1980)
        Dim population As New Tuple(Of String, Integer, Integer, Integer, Integer, Integer, Integer, _ 
            Tuple(Of Integer, Integer, Integer, Integer, Integer, Integer, Integer, Tuple(Of Integer, Integer, Integer))) _
            ("Detroit", 1860, 45619, 79577, 116340, 205876, 285704, from1910)

        Console.WriteLine("Population of {0}", population.Item1)
        Console.WriteLine()
        Console.WriteLine("{0,5}  {1,14}  {2,10}", "Year", "Population", "Change")

        Dim year As Integer = population.Item2
        ShowPopulation(year, population.Item3)
        year += 10
        ShowPopulationChange(year, population.Item4, population.Item3)
        year += 10
        ShowPopulationChange(year, population.Item5, population.Item4)
        year += 10
        ShowPopulationChange(year, population.Item6, population.Item5)
        year += 10
        ShowPopulationChange(year, population.Item7, population.Item6)
        year += 10
        ShowPopulationChange(year, population.Rest.Item1, population.Item7)
        year += 10
        ShowPopulationChange(year, population.Rest.Item2, population.Rest.Item1)
        year += 10
        ShowPopulationChange(year, population.Rest.Item3, population.Rest.Item2)
        year += 10
        ShowPopulationChange(year, population.Rest.Item4, population.Rest.Item3)
        year += 10
        ShowPopulationChange(year, population.Rest.Item5, population.Rest.Item4)
        year += 10
        ShowPopulationChange(year, population.Rest.Item6, population.Rest.Item5)
        year += 10
        ShowPopulationChange(year, population.Rest.Item7, population.Rest.Item6)
        year += 10
        ShowPopulationChange(year, population.Rest.Rest.Item1, population.Rest.Item7)
        year += 10
        ShowPopulationChange(year, population.Rest.Rest.Item2, population.Rest.Rest.Item1)
        year += 10
        ShowPopulationChange(year, population.Rest.Rest.Item3, population.Rest.Rest.Item2)
    End Sub

    Private Sub ShowPopulationChange(ByVal year As Integer, ByVal newPopulation As Integer, ByVal oldPopulation As Integer)
        Console.WriteLine("{0,5}  {1,14:N0}  {2,10:P2}", year, newPopulation,
                          (newPopulation - oldPopulation) / oldPopulation / 10)
    End Sub

    Private Sub ShowPopulation(ByVal year As Integer, ByVal newPopulation As Integer)
        Console.WriteLine("{0,5}  {1,14:N0}  {2,10:P2}", year, newPopulation, "n/a")
    End Sub
End Module
' The example displays the following output:
'
'    Population of Detroit
'    Year      Population      Change
'    1860          45,619         n/a
'    1870          79,577      7.44 %
'    1880         116,340      4.62 %
'    1890         205,876      7.70 %
'    1900         285,704      3.88 %
'    1910         465,766      6.30 %
'    1920         993,078     11.32 %
'    1930       1,568,622      5.80 %
'    1940       1,623,452      0.35 %
'    1950       1,849,568      1.39 %
'    1960       1,670,144     -0.97 %
'    1970       1,511,462     -0.95 %
'    1980       1,203,339     -2.04 %
'    1990       1,027,974     -1.46 %
'    2000         951,270     -0.75 %

Açıklamalar

Bileşenin Item2 türünü iki yoldan biriyle dinamik olarak belirleyebilirsiniz:

özelliği tarafından döndürülen değer üzerinde yöntemini çağırarak GetType Item2 .
Nesnesini temsil Tuple<T1,T2,T3,T4,T5,T6,T7,TRest> eden nesneyi alarak Type ve yöntemi tarafından Type.GetGenericArguments döndürülen diziden ikinci öğeyi alarak.

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