Tuple<T1,T2,T3,T4,T5>.Item1 Property
Definition
Important
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Gets the value of the current Tuple<T1,T2,T3,T4,T5> 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,T5> object's first component.
Examples
The following example defines an array of Tuple<T1,T2,T3,T4,T5> objects whose components contain the name of a state in the United States, its population in 1990 and 2000, its population change in this 10-year period, and the percentage change in its population. It then iterates through the array and displays the value of each component in a 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 %
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,T5> object, and retrieving the first element from the array that is returned by its Type.GetGenericArguments method.
