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Tuple<T1,T2,T3,T4,T5>.Item1 Propriété

  • Référence

Définition

Espace de noms:
System
Assembly:
System.Runtime.dll
Assembly:
mscorlib.dll
Assembly:
netstandard.dll

Obtient la valeur du premier composant de l'objet Tuple<T1,T2,T3,T4,T5> actif.

public:
 property T1 Item1 { T1 get(); };
public T1 Item1 { get; }
member this.Item1 : 'T1
Public ReadOnly Property Item1 As T1

Valeur de propriété

T1

Valeur du premier composant de l'objet Tuple<T1,T2,T3,T4,T5> actif.

Exemples

L’exemple suivant définit un tableau d’objets Tuple<T1,T2,T3,T4,T5> dont les composants contiennent le nom d’un état dans le États-Unis, sa population en 1990 et 2000, son changement de population dans cette période de 10 ans et le changement de pourcentage dans sa population. Il itère ensuite dans le tableau et affiche la valeur de chaque composant dans un tuple.

using System;

public class Example
{
   public static void Main()
   {
      // Define array of tuples reflecting population change by state, 1990-2000.
      Tuple<string, int, int, int, double>[] statesData = 
         { Tuple.Create("California", 29760021, 33871648, 4111627, 13.8), 
           Tuple.Create("Illinois", 11430602, 12419293, 988691, 8.6), 
           Tuple.Create("Washington", 4866692, 5894121, 1027429, 21.1) };

      // Display the items of each tuple
      Console.WriteLine("{0,-12}{1,18}{2,18}{3,15}{4,12}\n", "State", 
                        "Population 1990", "Population 2000", "Change", 
                        "% Change");
      foreach(Tuple<string, int, int, int, double> stateData in statesData)
         Console.WriteLine("{0,-12}{1,18:N0}{2,18:N0}{3,15:N0}{4,12:P1}", 
                           stateData.Item1, stateData.Item2, 
                           stateData.Item3, stateData.Item4, stateData.Item5/100);      
   }
}
// The example displays the following output:
//    State          Population 1990   Population 2000         Change    % Change
//    
//    California          29,760,021        33,871,648      4,111,627      13.8 %
//    Illinois            11,430,602        12,419,293        988,691       8.6 %
//    Washington           4,866,692         5,894,121      1,027,429      21.1 %

open System

// Define array of tuples reflecting population change by state, 1990-2000.
let statesData = 
    [| Tuple.Create("California", 29760021, 33871648, 4111627, 13.8)
       Tuple.Create("Illinois", 11430602, 12419293, 988691, 8.6)
       Tuple.Create("Washington", 4866692, 5894121, 1027429, 21.1) |]

// Display the items of each tuple
printfn "%-12s%18s%18s%15s%12s\n" "State" "Population 1990" "Population 2000" "Change" "% Change"
for stateData in statesData do
    printfn $"{stateData.Item1,-12}{stateData.Item2,18:N0}{stateData.Item3,18:N0}{stateData.Item4,15:N0}{stateData.Item5,12:P1}"
// The example displays the following output:
//    State          Population 1990   Population 2000         Change    % Change
//    
//    California          29,760,021        33,871,648      4,111,627      13.8 %
//    Illinois            11,430,602        12,419,293        988,691       8.6 %
//    Washington           4,866,692         5,894,121      1,027,429      21.1 %

Module Example
   Public Sub Main()
      ' Define array of tuples reflecting population change by state, 1990-2000.
      Dim statesData() = 
          { Tuple.Create("California", 29760021, 33871648, 4111627, 13.8), 
            Tuple.Create("Illinois", 11430602, 12419293, 988691, 8.6), 
            Tuple.Create("Washington", 4866692, 5894121, 1027429, 21.1) }
      ' Display the items of each tuple
      Console.WriteLine("{0,-12}{1,18}{2,18}{3,15}{4,12}", "State", "Population 1990", _
                        "Population 2000", "Change", "% Change")
      Console.WriteLine()
      For Each stateData As Tuple(Of String, Integer, Integer, Integer, Double) In statesData
         Console.WriteLine("{0,-12}{1,18:N0}{2,18:N0}{3,15:N0}{4,12:P1}", _
                           stateData.Item1, stateData.Item2, _
                           stateData.Item3, stateData.Item4, stateData.Item5/100)      
      Next                                                                    
   End Sub
End Module
' The example displays the following output:
'    State          Population 1990   Population 2000         Change    % Change
'    
'    California          29,760,021        33,871,648      4,111,627      13.8 %
'    Illinois            11,430,602        12,419,293        988,691       8.6 %
'    Washington           4,866,692         5,894,121      1,027,429      21.1 %

Remarques

Vous pouvez déterminer dynamiquement le type du Item1 composant de l’une des deux manières suivantes :

S’applique à