Tuple<T1,T2,T3,T4>.Item1 Property
Definition
Important
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Gets the value of the current Tuple<T1,T2,T3,T4> object's first component.
public:
property T1 Item1 { T1 get(); };public T1 Item1 { get; }member this.Item1 : 'T1Public ReadOnly Property Item1 As T1Property Value
The value of the current Tuple<T1,T2,T3,T4> object's first component.
Examples
The following example defines an array of Tuple<T1,T2,T3,T4> objects whose components contain the name of a city, a month of the year, and the average high and low temperatures for that month. It then retrieves and displays the value of each component.
using System;
using System.Globalization;
public class Example
{
public static void Main()
{
Tuple<string, int, double, double>[] temperatures =
{ Tuple.Create("New York, NY", 4, 61.0, 43.0),
Tuple.Create("Chicago, IL", 2, 34.0, 18.0),
Tuple.Create("Newark, NJ", 4, 61.0, 43.0),
Tuple.Create("Boston, MA", 6, 77.0, 59.0),
Tuple.Create("Detroit, MI", 9, 74.0, 53.0),
Tuple.Create("Minneapolis, MN", 8, 81.0, 61.0) };
// Display the array of 4-tuple objects.
Console.WriteLine("{0,41}", "Temperatures");
Console.WriteLine("{0,-20} {1,5} {2,4} {3,4}\n",
"City", "Month", "High", "Low");
foreach (var temperature in temperatures)
Console.WriteLine("{0,-20} {1,5} {2,4:N1} {3,4:N1}",
temperature.Item1,
DateTimeFormatInfo.CurrentInfo.GetAbbreviatedMonthName(temperature.Item2 - 1),
temperature.Item3, temperature.Item4);
}
}
// The example displays the following output:
// Temperatures
// City Month High Low
//
// New York, NY Mar 61.0 43.0
// Chicago, IL Jan 34.0 18.0
// Newark, NJ Mar 61.0 43.0
// Boston, MA May 77.0 59.0
// Detroit, MI Aug 74.0 53.0
// Minneapolis, MN Jul 81.0 61.0
open System
open System.Globalization
let temperatures =
[| Tuple.Create("New York, NY", 4, 61.0, 43.0)
Tuple.Create("Chicago, IL", 2, 34.0, 18.0)
Tuple.Create("Newark, NJ", 4, 61.0, 43.0)
Tuple.Create("Boston, MA", 6, 77.0, 59.0)
Tuple.Create("Detroit, MI", 9, 74.0, 53.0)
Tuple.Create("Minneapolis, MN", 8, 81.0, 61.0) |]
// Display the array of 4-tuple objects.
printfn "%41s" "Temperatures"
printfn "%-20s %5s %4s %4s\n" "City" "Month" "High" "Low"
for temperature in temperatures do
printfn $"{temperature.Item1,-20} {DateTimeFormatInfo.CurrentInfo.GetAbbreviatedMonthName(temperature.Item2 - 1),5} {temperature.Item3,4:N1} {temperature.Item4,4:N1}"
// The example displays the following output:
// Temperatures
// City Month High Low
//
// New York, NY Mar 61.0 43.0
// Chicago, IL Jan 34.0 18.0
// Newark, NJ Mar 61.0 43.0
// Boston, MA May 77.0 59.0
// Detroit, MI Aug 74.0 53.0
// Minneapolis, MN Jul 81.0 61.0
Imports System.Globalization
Module Example
Public Sub Main()
Dim temperatures() =
{ Tuple.Create("New York, NY", 4, 61, 43), _
Tuple.Create("Chicago, IL", 2, 34, 18), _
Tuple.Create("Newark, NJ", 4, 61, 43), _
Tuple.Create("Boston, MA", 6, 77, 59), _
Tuple.Create("Detroit, MI", 9, 74, 53), _
Tuple.Create("Minneapolis, MN", 8, 81, 61) }
' Display the array of 4-tuples.
Console.WriteLine("{0,41}", "Temperatures")
Console.WriteLine("{0,-20} {1,5} {2,4} {3,4}",
"City", "Month", "High", "Low")
Console.WriteLine()
For Each temperature In temperatures
Console.WriteLine("{0,-20} {1,5} {2,4:N1} {3,4:N1}",
temperature.Item1,
DateTimeFormatInfo.CurrentInfo.GetAbbreviatedMonthName(temperature.Item2 - 1),
temperature.Item3, temperature.Item4)
Next
End Sub
End Module
' The example displays the following output:
' Temperatures
' City Month High Low
'
' New York, NY Mar 61.0 43.0
' Chicago, IL Jan 34.0 18.0
' Newark, NJ Mar 61.0 43.0
' Boston, MA May 77.0 59.0
' Detroit, MI Aug 74.0 53.0
' Minneapolis, MN Jul 81.0 61.0
Remarks
You can dynamically determine the type of the Item1 component in one of two ways:
By calling the
GetTypemethod on the value that is returned by the Item1 property.By retrieving the Type object that represents the Tuple<T1,T2,T3,T4> object, and retrieving the first element from the array that is returned by its Type.GetGenericArguments method.
