Tuple<T1>.Item1 Property
Important
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Gets the value of the Tuple<T1> object's single component.
public:
property T1 Item1 { T1 get(); };
public T1 Item1 { get; }
member this.Item1 : 'T1
Public ReadOnly Property Item1 As T1
The value of the current Tuple<T1> object's single component.
The following example displays information about two singletons and their components.
using System;
using System.Numerics;
public class Example
{
public static void Main()
{
var tuple1 = Tuple.Create(-1.23445e-32);
// Display information about this singleton.
Type tuple1Type = tuple1.GetType();
Console.WriteLine("First 1-Tuple:");
Console.WriteLine(" Type: {0}", tuple1Type.Name);
Console.WriteLine(" Generic Parameter Type: {0}",
tuple1Type.GetGenericArguments()[0]);
Console.WriteLine(" Component Value: {0}", tuple1.Item1);
Console.WriteLine(" Component Value Type: {0}",
tuple1.Item1.GetType().Name);
Console.WriteLine();
var tuple2 = Tuple.Create((BigInteger)1.83789322281780983781356676e103);
// Display information about this singleton.
Type tuple2Type = tuple2.GetType();
Console.WriteLine("Second 1-Tuple:");
Console.WriteLine(" Type: {0}", tuple2Type.Name);
Console.WriteLine(" Generic Parameter Type: {0}",
tuple2Type.GetGenericArguments()[0]);
Console.WriteLine(" Component Value: {0}", tuple2.Item1);
Console.WriteLine(" Component Value Type: {0}",
tuple2.Item1.GetType().Name);
}
}
// The example displays the following output:
// First 1-Tuple:
// Type: Tuple`1
// Generic Parameter Type: System.Double
// Component Value: -1.23445E-32
// Component Value Type: Double
//
// Second 1-Tuple:
// Type: Tuple`1
// Generic Parameter Type: System.Numerics.BigInteger
// Component Value: 1.8378932228178098168858909492E+103
// Component Value Type: BigInteger
open System
let tuple1 = Tuple.Create -1.23445e-32
// Display information about this singleton.
let tuple1Type = tuple1.GetType()
printfn "First 1-Tuple:"
printfn $" Type: {tuple1Type.Name}"
printfn $" Generic Parameter Type: {tuple1Type.GetGenericArguments()[0]}"
printfn $" Component Value: {tuple1.Item1}"
printfn $" Component Value Type: {tuple1.Item1.GetType().Name}\n"
let tuple2 = Tuple.Create(bigint 1.83789322281780983781356676e103)
// Display information about this singleton.
let tuple2Type = tuple2.GetType()
printfn "Second 1-Tuple:"
printfn $" Type: {tuple2Type.Name}"
printfn $" Generic Parameter Type: {tuple2Type.GetGenericArguments()[0]}"
printfn $" Component Value: {tuple2.Item1}"
printfn $" Component Value Type: {tuple2.Item1.GetType().Name}"
// The example displays the following output:
// First 1-Tuple:
// Type: Tuple`1
// Generic Parameter Type: System.Double
// Component Value: -1.23445E-32
// Component Value Type: Double
//
// Second 1-Tuple:
// Type: Tuple`1
// Generic Parameter Type: System.Numerics.BigInteger
// Component Value: 1.8378932228178098168858909492E+103
// Component Value Type: BigInteger
Imports System.Numerics
Module modMain
Public Sub Main()
Dim tuple1 = Tuple.Create(-1.23445e-32)
' Display information about this singleton.
Dim tuple1Type As Type = tuple1.GetType()
Console.WriteLine("First 1-Tuple:")
Console.WriteLine(" Type: {0}", tuple1Type.Name)
Console.WriteLine(" Generic Parameter Type: {0}",
tuple1Type.GetGenericArguments()(0))
Console.WriteLine(" Component Value: {0}", tuple1.Item1)
Console.WriteLine(" Component Value Type: {0}",
tuple1.Item1.GetType().Name)
Console.WriteLine()
Dim tuple2 As New Tuple(Of BigInteger)(1.83789322281780983781356676e103)
' Display information about this singleton.
Dim tuple2Type As Type = tuple2.GetType()
Console.WriteLine("Second 1-Tuple:")
Console.WriteLine(" Type: {0}", tuple2Type.Name)
Console.WriteLine(" Generic Parameter Type: {0}",
tuple2Type.GetGenericArguments()(0))
Console.WriteLine(" Component Value: {0}", tuple2.Item1)
Console.WriteLine(" Component Value Type: {0}",
tuple2.Item1.GetType().Name)
End Sub
End Module
' The example displays the following output:
' First 1-Tuple:
' Type: Tuple`1
' Generic Parameter Type: System.Double
' Component Value: -1.23445E-32
' Component Value Type: Double
'
' Second 1-Tuple:
' Type: Tuple`1
' Generic Parameter Type: System.Numerics.BigInteger
' Component Value: 1.8378932228178098168858909492E+103
' Component Value Type: BigInteger
You can determine the type of the Item1 component in one of two ways:
By calling the
GetType
method on the value that is returned by the Item1 property.By retrieving the Type object that represents the Tuple<T1> object, and retrieving the first element from the array that is returned by its Type.GetGenericArguments method.
The example illustrates both approaches.
Produit | Versions |
---|---|
.NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Framework | 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1 |
UWP | 10.0 |
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