VB.NET ArrayList.IndexOf方法代码示例

OStack程序员社区-中国程序员成长平台 › 门户 › 编程› VB.NET›VB.NET教程

原作者: [db:作者] 来自: [db:来源] 收藏邀请

本文整理汇总了VB.NET中System.Collections.ArrayList.IndexOf方法的典型用法代码示例。如果您正苦于以下问题：VB.NET ArrayList.IndexOf方法的具体用法？VB.NET ArrayList.IndexOf怎么用？VB.NET ArrayList.IndexOf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.ArrayList的用法示例。

在下文中一共展示了ArrayList.IndexOf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: SamplesArrayList

' 导入命名空间
Imports System.Collections

Public Class SamplesArrayList


    Public Shared Sub Main()

        ' Creates and initializes a new ArrayList with three elements of the same value.
        Dim myAL As New ArrayList()
        myAL.Add("the")
        myAL.Add("quick")
        myAL.Add("brown")
        myAL.Add("fox")
        myAL.Add("jumps")
        myAL.Add("over")
        myAL.Add("the")
        myAL.Add("lazy")
        myAL.Add("dog")
        myAL.Add("in")
        myAL.Add("the")
        myAL.Add("barn")

        ' Displays the values of the ArrayList.
        Console.WriteLine("The ArrayList contains the following values:")
        PrintIndexAndValues(myAL)

        ' Search for the first occurrence of the duplicated value.
        Dim myString As [String] = "the"
        Dim myIndex As Integer = myAL.IndexOf(myString)
        Console.WriteLine("The first occurrence of ""{0}"" is at index {1}.", myString, myIndex)

        ' Search for the first occurrence of the duplicated value in the last section of the ArrayList.
        myIndex = myAL.IndexOf(myString, 4)
        Console.WriteLine("The first occurrence of ""{0}"" between index 4 and the end is at index {1}.", myString, myIndex)

        ' Search for the first occurrence of the duplicated value in a section of the ArrayList.
        myIndex = myAL.IndexOf(myString, 6, 6)
        Console.WriteLine("The first occurrence of ""{0}"" between index 6 and index 11 is at index {1}.", myString, myIndex)

        ' Search for the first occurrence of the duplicated value in a small section at the end of the ArrayList.
        myIndex = myAL.IndexOf(myString, 11)
        Console.WriteLine("The first occurrence of ""{0}"" between index 11 and the end is at index {1}.", myString, myIndex)

    End Sub

    Public Shared Sub PrintIndexAndValues(ByVal myList As IEnumerable)
        Dim i As Integer
        Dim obj As [Object]
        For Each obj In myList
            Console.WriteLine("   [{0}]:    {1}", i, obj)
            i = i + 1
        Next obj
        Console.WriteLine()
    End Sub

End Class

开发者ID:VB.NET开发者，项目名称:System.Collections，代码行数:57，代码来源:ArrayList.IndexOf

输出：

The ArrayList contains the following values:
[0]:	the
[1]:	quick
[2]:	brown
[3]:	fox
[4]:	jumps
[5]:	over
[6]:	the
[7]:	lazy
[8]:	dog
[9]:	in
[10]:	the
[11]:	barn

The first occurrence of "the" is at index 0.
The first occurrence of "the" between index 4 and the end is at index 6.
The first occurrence of "the" between index 6 and index 11 is at index 6.
The first occurrence of "the" between index 11 and the end is at index -1.

示例2: MainClass

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

Public Class MainClass

   Public Shared Sub Main()
      Dim arrayList As arrayList = New arrayList(1)

      arrayList.Add("a")

      try
          Console.WriteLine(arrayList(0))
      Catch outOfRange As ArgumentOutOfRangeException
          Console.WriteLine(outOfRange.ToString())
      End Try

      Console.WriteLine(arrayList.Count)

      Console.WriteLine(arrayList.Contains("a"))
      
      Console.WriteLine(arrayList.IndexOf("a"))

      arrayList.Remove("a")

      arrayList.TrimToSize()
      Console.WriteLine(arrayList.Capacity)

      arrayList.Add("a")

      Dim enumerator As IEnumerator = arrayList.GetEnumerator()

      While enumerator.MoveNext()
         Console.WriteLine(enumerator.Current )
      End While 
   End Sub
End Class

开发者ID:VB程序员，项目名称:System.Collections，代码行数:37，代码来源:ArrayList.IndexOf

注：本文中的System.Collections.ArrayList.IndexOf方法示例整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。