本文整理汇总了VB.NET中System.Collections.Specialized.StringCollection类的典型用法代码示例。如果您正苦于以下问题：VB.NET StringCollection类的具体用法？VB.NET StringCollection怎么用？VB.NET StringCollection使用的例子？那么, 这里精选的类代码示例或许可以为您提供帮助。
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示例1: SamplesStringCollection
' 导入命名空间
Imports System.Collections
Imports System.Collections.Specialized
Public Class SamplesStringCollection
Public Shared Sub Main()
' Create and initializes a new StringCollection.
Dim myCol As New StringCollection()
' Add a range of elements from an array to the end of the StringCollection.
Dim myArr() As String = {"RED", "orange", "yellow", "RED", "green", "blue", "RED", "indigo", "violet", "RED"}
myCol.AddRange(myArr)
' Display the contents of the collection using foreach. This is the preferred method.
Console.WriteLine("Displays the elements using foreach:")
PrintValues1(myCol)
' Display the contents of the collection using the enumerator.
Console.WriteLine("Displays the elements using the IEnumerator:")
PrintValues2(myCol)
' Display the contents of the collection using the Count and Item properties.
Console.WriteLine("Displays the elements using the Count and Item properties:")
PrintValues3(myCol)
' Add one element to the end of the StringCollection and insert another at index 3.
myCol.Add("* white")
myCol.Insert(3, "* gray")
Console.WriteLine("After adding ""* white"" to the end and inserting ""* gray"" at index 3:")
PrintValues1(myCol)
' Remove one element from the StringCollection.
myCol.Remove("yellow")
Console.WriteLine("After removing ""yellow"":")
PrintValues1(myCol)
' Remove all occurrences of a value from the StringCollection.
Dim i As Integer = myCol.IndexOf("RED")
While i > - 1
myCol.RemoveAt(i)
i = myCol.IndexOf("RED")
End While
' Verify that all occurrences of "RED" are gone.
If myCol.Contains("RED") Then
Console.WriteLine("*** The collection still contains ""RED"".")
End If
Console.WriteLine("After removing all occurrences of ""RED"":")
PrintValues1(myCol)
' Copy the collection to a new array starting at index 0.
Dim myArr2(myCol.Count) As String
myCol.CopyTo(myArr2, 0)
Console.WriteLine("The new array contains:")
For i = 0 To myArr2.Length - 1
Console.WriteLine(" [{0}] {1}", i, myArr2(i))
Next i
Console.WriteLine()
' Clears the entire collection.
myCol.Clear()
Console.WriteLine("After clearing the collection:")
PrintValues1(myCol)
End Sub
' Uses the foreach statement which hides the complexity of the enumerator.
' NOTE: The foreach statement is the preferred way of enumerating the contents of a collection.
Public Shared Sub PrintValues1(myCol As StringCollection)
Dim obj As [Object]
For Each obj In myCol
Console.WriteLine(" {0}", obj)
Next obj
Console.WriteLine()
End Sub
' Uses the enumerator.
' NOTE: The foreach statement is the preferred way of enumerating the contents of a collection.
Public Shared Sub PrintValues2(myCol As StringCollection)
Dim myEnumerator As StringEnumerator = myCol.GetEnumerator()
While myEnumerator.MoveNext()
Console.WriteLine(" {0}", myEnumerator.Current)
End While
Console.WriteLine()
End Sub
' Uses the Count and Item properties.
Public Shared Sub PrintValues3(myCol As StringCollection)
Dim i As Integer
For i = 0 To myCol.Count - 1
Console.WriteLine(" {0}", myCol(i))
Next i
Console.WriteLine()
End Sub
End Class输出：
Displays the elements using foreach: RED orange yellow RED green blue RED indigo violet RED Displays the elements using the IEnumerator: RED orange yellow RED green blue RED indigo violet RED Displays the elements using the Count and Item properties: RED orange yellow RED green blue RED indigo violet RED After adding "* white" to the end and inserting "* gray" at index 3: RED orange yellow * gray RED green blue RED indigo violet RED * white After removing "yellow": RED orange * gray RED green blue RED indigo violet RED * white After removing all occurrences of "RED": orange * gray green blue indigo violet * white The new array contains: [0] orange [1] * gray [2] green [3] blue [4] indigo [5] violet [6] * white After clearing the collection: