Tuple<T1,T2,T3,T4,T5,T6,T7>.Item1 Property
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Gets the value of the current Tuple<T1,T2,T3,T4,T5,T6,T7> 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,T6,T7> object's first component.
Examples
The following example defines an array of Tuple<T1,T2,T3,T4,T5,T6,T7> objects whose components contain population data for three U.S. cities (New York, Chicago, and Los Angeles) from 1950 through 2000. It then displays a table that lists the data. To display the city name, it retrieves the value of the Item1 property for each Tuple<T1,T2,T3,T4,T5,T6,T7> object.
using System;
using System.Text.RegularExpressions;
public class Class1
{
public static void Main()
{
// Create tuples containing population data for New York, Chicago,
// and Los Angeles, 1960-2000.
Tuple<string, int, int, int, int, int, int>[] cities =
{ Tuple.Create("New York", 7891957, 7781984, 7894862, 7071639, 7322564, 8008278),
Tuple.Create("Los Angeles", 1970358, 2479015, 2816061, 2966850, 3485398, 3694820),
Tuple.Create("Chicago", 3620962, 3550904, 3366957, 3005072, 2783726, 2896016) };
// Display tuple data in table.
string header = "Population in";
Console.WriteLine("{0,-12} {1,66}",
"City", new String('-',(66-header.Length)/2) + header +
new String('-', (66-header.Length)/2));
Console.WriteLine("{0,24}{1,11}{2,11}{3,11}{4,11}{5,11}\n",
"1950", "1960", "1970", "1980", "1990", "2000");
foreach (var city in cities)
Console.WriteLine("{0,-12} {1,11:N0}{2,11:N0}{3,11:N0}{4,11:N0}{5,11:N0}{6,11:N0}",
city.Item1, city.Item2, city.Item3, city.Item4,
city.Item5, city.Item6, city.Item7);
}
}
// The example displays the following output:
// City --------------------------Population in--------------------------
// 1950 1960 1970 1980 1990 2000
//
// New York 7,891,957 7,781,984 7,894,862 7,071,639 7,322,564 8,008,278
// Los Angeles 1,970,358 2,479,015 2,816,061 2,966,850 3,485,398 3,694,820
// Chicago 3,620,962 3,550,904 3,366,957 3,005,072 2,783,726 2,896,016
open System
// Create tuples containing population data for New York, Chicago,
// and Los Angeles, 1960-2000.
let cities =
[| Tuple.Create("New York", 7891957, 7781984, 7894862, 7071639, 7322564, 8008278)
Tuple.Create("Los Angeles", 1970358, 2479015, 2816061, 2966850, 3485398, 3694820)
Tuple.Create("Chicago", 3620962, 3550904, 3366957, 3005072, 2783726, 2896016) |]
// Display tuple data in table.
let header = "Population in"
printfn $"""{"City",-12} {String('-',(66 - header.Length) / 2) + header + String('-', (66 - header.Length) / 2),66}"""
printfn "%24s%11s%11s%11s%11s%11s\n" "1950" "1960" "1970" "1980" "1990" "2000"
for city in cities do
printfn $"{city.Item1,-12} {city.Item2,11:N0}{city.Item3,11:N0}{city.Item4,11:N0}{city.Item5,11:N0}{city.Item6,11:N0}{city.Item7,11:N0}"
// The example displays the following output:
// City --------------------------Population in--------------------------
// 1950 1960 1970 1980 1990 2000
//
// New York 7,891,957 7,781,984 7,894,862 7,071,639 7,322,564 8,008,278
// Los Angeles 1,970,358 2,479,015 2,816,061 2,966,850 3,485,398 3,694,820
// Chicago 3,620,962 3,550,904 3,366,957 3,005,072 2,783,726 2,896,016
Module Example
Public Sub Main()
' Create tuples containing population data for New York, Chicago,
' and Los Angeles, 1960-2000.
Dim cities() =
{ Tuple.Create("New York", 7891957, 7781984, 7894862,
7071639, 7322564, 8008278),
Tuple.Create("Los Angeles", 1970358, 2479015, 2816061,
2966850, 3485398, 3694820),
Tuple.Create("Chicago", 3620962, 3550904, 3366957,
3005072, 2783726, 2896016) }
' Display tuple data in table.
Dim header As String = "Population in"
Console.WriteLine("{0,-12} {1,66}",
"City", New String("-"c,(66-header.Length)\2) + header + _
New String("-"c, (66-header.Length)\2))
Console.WriteLine("{0,24}{1,11}{2,11}{3,11}{4,11}{5,11}",
"1950", "1960", "1970", "1980", "1990", "2000")
Console.WriteLine()
For Each city In cities
Console.WriteLine("{0,-12} {1,11:N0}{2,11:N0}{3,11:N0}{4,11:N0}{5,11:N0}{6,11:N0}",
city.Item1, city.Item2, city.Item3, city.Item4,
city.Item5, city.Item6, city.Item7)
Next
End Sub
End Module
' The example displays the following output:
' City --------------------------Population in--------------------------
' 1950 1960 1970 1980 1990 2000
'
' New York 7,891,957 7,781,984 7,894,862 7,071,639 7,322,564 8,008,278
' Los Angeles 1,970,358 2,479,015 2,816,061 2,966,850 3,485,398 3,694,820
' Chicago 3,620,962 3,550,904 3,366,957 3,005,072 2,783,726 2,896,016
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,T6,T7> object, and retrieving the first element from the array that is returned by its Type.GetGenericArguments method.
Applies to
.NET