StringEnumerator.Reset 方法
定义
重要
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将枚举器设置为其初始位置，该位置位于集合中的第一个元素之前。
public:
void Reset();public void Reset();member this.Reset : unit -> unitPublic Sub Reset ()例外
创建枚举器后修改了集合。
示例
下面的代码示例演示了多个属性和方法 StringEnumerator。
using System;
using System.Collections.Specialized;
public class SamplesStringEnumerator {
public static void Main() {
// Creates and initializes a StringCollection.
StringCollection myCol = new StringCollection();
String[] myArr = new String[] { "red", "orange", "yellow", "green", "blue", "indigo", "violet" };
myCol.AddRange( myArr );
// Enumerates the elements in the StringCollection.
StringEnumerator myEnumerator = myCol.GetEnumerator();
while ( myEnumerator.MoveNext() )
Console.WriteLine( "{0}", myEnumerator.Current );
Console.WriteLine();
// Resets the enumerator and displays the first element again.
myEnumerator.Reset();
if ( myEnumerator.MoveNext() )
Console.WriteLine( "The first element is {0}.", myEnumerator.Current );
}
}
/*
This code produces the following output.
red
orange
yellow
green
blue
indigo
violet
The first element is red.
*/
Imports System.Collections.Specialized
Public Class SamplesStringEnumerator
Public Shared Sub Main()
' Creates and initializes a StringCollection.
Dim myCol As New StringCollection()
Dim myArr() As [String] = {"red", "orange", "yellow", "green", "blue", "indigo", "violet"}
myCol.AddRange(myArr)
' Enumerates the elements in the StringCollection.
Dim myEnumerator As StringEnumerator = myCol.GetEnumerator()
While myEnumerator.MoveNext()
Console.WriteLine("{0}", myEnumerator.Current)
End While
Console.WriteLine()
' Resets the enumerator and displays the first element again.
myEnumerator.Reset()
If myEnumerator.MoveNext() Then
Console.WriteLine("The first element is {0}.", myEnumerator.Current)
End If
End Sub
End Class
'This code produces the following output.
'
'red
'orange
'yellow
'green
'blue
'indigo
'violet
'
'The first element is red.
注解
Reset 将枚举器移到集合的开头，然后移到第一个元素之前。 之后 Reset， MoveNext 必须先调用枚举器，再将枚举器移动到集合的第一个元素，然后再读取值 Current。
