VB.NET IEnumerable.GetEnumerator方法代码示例

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本文整理汇总了VB.NET中System.Collections.IEnumerable.GetEnumerator方法的典型用法代码示例。如果您正苦于以下问题：VB.NET IEnumerable.GetEnumerator方法的具体用法？VB.NET IEnumerable.GetEnumerator怎么用？VB.NET IEnumerable.GetEnumerator使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Collections.IEnumerable的用法示例。

在下文中一共展示了IEnumerable.GetEnumerator方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的VB.NET代码示例。

示例1: Person

' 导入命名空间
Imports System.Collections

' Simple business object.
Public Class Person

    Public Sub New(ByVal fName As String, ByVal lName As String)
        Me.firstName = fName
        Me.lastName = lName
    End Sub


    Public firstName As String
    Public lastName As String
End Class

' Collection of Person objects, which implements IEnumerable so that
' it can be used with ForEach syntax.
Public Class People
    Implements IEnumerable

    Private _people() As Person

    Public Sub New(ByVal pArray() As Person)
        _people = New Person(pArray.Length - 1) {}

        Dim i As Integer
        For i = 0 To pArray.Length - 1
            _people(i) = pArray(i)
        Next i
    End Sub

    ' Implementation of GetEnumerator.
    Public Function GetEnumerator() As IEnumerator _
      Implements IEnumerable.GetEnumerator

        Return New PeopleEnum(_people)
    End Function

End Class

' When you implement IEnumerable, you must also implement IEnumerator.
Public Class PeopleEnum
    Implements IEnumerator

    Public _people() As Person

    ' Enumerators are positioned before the first element
    ' until the first MoveNext() call.
    Dim position As Integer = -1

    Public Sub New(ByVal list() As Person)
        _people = list
    End Sub

    Public Function MoveNext() As Boolean Implements IEnumerator.MoveNext
        position = position + 1
        Return (position < _people.Length)
    End Function

    Public Sub Reset() Implements IEnumerator.Reset
        position = -1
    End Sub

    Public ReadOnly Property Current() As Object Implements IEnumerator.Current
        Get
            Try
                Return _people(position)
            Catch ex As IndexOutOfRangeException
                Throw New InvalidOperationException()
            End Try
        End Get
    End Property
End Class

Class App
    Shared Sub Main()
        Dim peopleArray() As Person = { _
            New Person("John", "Smith"), _
            New Person("Jim", "Johnson"), _
            New Person("Sue", "Rabon")}

        Dim peopleList As New People(peopleArray)
        Dim p As Person
        For Each p In peopleList
            Console.WriteLine(p.firstName + " " + p.lastName)
        Next

    End Sub
End Class

开发者ID:VB.NET开发者，项目名称:System.Collections，代码行数:90，代码来源:IEnumerable.GetEnumerator

输出：

John Smith
Jim Johnson
Sue Rabon

示例2: MainClass

' 导入命名空间
Imports System
Imports System.Collections

Public Class MainClass
    
    Shared Sub Main()
             Dim intQueue As New Queue(  )

             Dim i As Integer
             For i = 0 To 4
                 intQueue.Enqueue((i * 5))
             Next i

             Console.WriteLine("intQueue values:")
             DisplayValues(intQueue)

             Console.WriteLine("(Dequeue) {0}", intQueue.Dequeue(  ))

             Console.WriteLine("intQueue values:")
             DisplayValues(intQueue)

             Console.WriteLine("(Dequeue) {0}", intQueue.Dequeue(  ))

             Console.WriteLine("intQueue values:")
             DisplayValues(intQueue)

             Console.WriteLine("(Peek)   {0}", intQueue.Peek(  ))

             Console.WriteLine("intQueue values:")
             DisplayValues(intQueue)
   End Sub

   Public Shared Sub DisplayValues(ByVal myCollection As IEnumerable)
       Dim myEnumerator As IEnumerator = myCollection.GetEnumerator(  )
       While myEnumerator.MoveNext(  )
           Console.WriteLine("{0} ", myEnumerator.Current)
       End While
       Console.WriteLine(  )
   End Sub

End Class

开发者ID:VB程序员，项目名称:System.Collections，代码行数:42，代码来源:IEnumerable.GetEnumerator

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