Tuple(Of T1, T2, T3, T4, T5, T6, T7).Item1 Property
Gets the value of the current Tuple(Of T1, T2, T3, T4, T5, T6, T7) object's first component.
Namespace: System
Assembly: mscorlib (in mscorlib.dll)
You can dynamically 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(Of T1, T2, T3, T4, T5, T6, T7) object, and retrieving the first element from the array that is returned by its Type.GetGenericArguments method.
The following example defines an array of Tuple(Of 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(Of T1, T2, T3, T4, T5, T6, T7) object.
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
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
