Stack.Clear-Methode

Entfernt alle Objekte aus Stack.

Namespace: System.Collections
Assembly: mscorlib (in mscorlib.dll)

Syntax

'Declaration
Public Overridable Sub Clear
'Usage
Dim instance As Stack

instance.Clear

public virtual void Clear ()

public:
virtual void Clear ()

public void Clear ()

public function Clear ()

Hinweise

Count wird auf 0 (null) festgelegt, und Verweise auf andere Objekte von Elementen in der Auflistung werden ebenfalls freigegeben.

Diese Methode ist eine O(n)-Operation, wobei n die Count ist.

Beispiel

Im folgenden Beispiel wird das Löschen der Werte in Stack erläutert.

Imports System
Imports System.Collections
Imports Microsoft.VisualBasic

Public Class SamplesStack    
    
    Public Shared Sub Main()
        
        ' Creates and initializes a new Stack.
        Dim myStack As New Stack()
        myStack.Push("The")
        myStack.Push("quick")
        myStack.Push("brown")
        myStack.Push("fox")
        myStack.Push("jumped")
        
        ' Displays the count and values of the Stack.
        Console.WriteLine("Initially,")
        Console.WriteLine("   Count    : {0}", myStack.Count)
        Console.Write("   Values:")
        PrintValues(myStack)
        
        ' Clears the Stack.
        myStack.Clear()
        
        ' Displays the count and values of the Stack.
        Console.WriteLine("After Clear,")
        Console.WriteLine("   Count    : {0}", myStack.Count)
        Console.Write("   Values:")
        PrintValues(myStack)

    End Sub    

    Public Shared Sub PrintValues(myCollection As IEnumerable)
        Dim obj As [Object]
        For Each obj In  myCollection
            Console.Write("    {0}", obj)
        Next obj
        Console.WriteLine()
    End Sub 'PrintValues

End Class


' This code produces the following output.
' 
' Initially,
'    Count    : 5
'    Values:    jumped    fox    brown    quick    The
' After Clear,
'    Count    : 0
'    Values:

using System;
using System.Collections;

public class SamplesStack  {

   public static void Main()  {

      // Creates and initializes a new Stack.
      Stack myStack = new Stack();
      myStack.Push( "The" );
      myStack.Push( "quick" );
      myStack.Push( "brown" );
      myStack.Push( "fox" );
      myStack.Push( "jumped" );

      // Displays the count and values of the Stack.
      Console.WriteLine( "Initially," );
      Console.WriteLine( "   Count    : {0}", myStack.Count );
      Console.Write( "   Values:" );
      PrintValues( myStack );

      // Clears the Stack.
      myStack.Clear();

      // Displays the count and values of the Stack.
      Console.WriteLine( "After Clear," );
      Console.WriteLine( "   Count    : {0}", myStack.Count );
      Console.Write( "   Values:" );
      PrintValues( myStack );

   }

   public static void PrintValues( IEnumerable myCollection )  {
      foreach ( Object obj in myCollection )
         Console.Write( "    {0}", obj );
      Console.WriteLine();
   }

}


/* 
This code produces the following output.

Initially,
   Count    : 5
   Values:    jumped    fox    brown    quick    The
After Clear,
   Count    : 0
   Values:
*/ 

using namespace System;
using namespace System::Collections;
void PrintValues( IEnumerable^ myCollection );
int main()
{
   
   // Creates and initializes a new Stack.
   Stack^ myStack = gcnew Stack;
   myStack->Push( "The" );
   myStack->Push( "quick" );
   myStack->Push( "brown" );
   myStack->Push( "fox" );
   myStack->Push( "jumped" );
   
   // Displays the count and values of the Stack.
   Console::WriteLine( "Initially," );
   Console::WriteLine( "   Count    : {0}", myStack->Count );
   Console::Write( "   Values:" );
   PrintValues( myStack );
   
   // Clears the Stack.
   myStack->Clear();
   
   // Displays the count and values of the Stack.
   Console::WriteLine( "After Clear," );
   Console::WriteLine( "   Count    : {0}", myStack->Count );
   Console::Write( "   Values:" );
   PrintValues( myStack );
}

void PrintValues( IEnumerable^ myCollection )
{
   IEnumerator^ myEnum = myCollection->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      Object^ obj = safe_cast<Object^>(myEnum->Current);
      Console::Write( "    {0}", obj );
   }

   Console::WriteLine();
}

/* 
 This code produces the following output.
 
 Initially,
    Count    : 5
    Values:    jumped    fox    brown    quick    The
 After Clear,
    Count    : 0
    Values:
 */

import System.*;
import System.Collections.*;

public class SamplesStack
{
    public static void main(String[] args)
    {
        // Creates and initializes a new Stack.
        Stack myStack = new Stack();

        myStack.Push("The");
        myStack.Push("quick");
        myStack.Push("brown");
        myStack.Push("fox");
        myStack.Push("jumped");

        // Displays the count and values of the Stack.
        Console.WriteLine("Initially,");
        Console.WriteLine("   Count    : {0}", 
            System.Convert.ToString(myStack.get_Count()));
        Console.Write("   Values:");
        PrintValues(myStack);

        // Clears the Stack.
        myStack.Clear();

        // Displays the count and values of the Stack.
        Console.WriteLine("After Clear,");
        Console.WriteLine("   Count    : {0}", 
            System.Convert.ToString(myStack.get_Count()));
        Console.Write("   Values:");
        PrintValues(myStack);
    } //main

    public static void PrintValues(IEnumerable myCollection)
    {
        IEnumerator objEnum = myCollection.GetEnumerator();
        while (objEnum.MoveNext()) {
            Console.Write("    {0}", objEnum.get_Current());
        }
        Console.WriteLine();
    } //PrintValues
} //SamplesStack

/* 
 This code produces the following output.
 
 Initially,
    Count    : 5
    Values:    jumped    fox    brown    quick    The
 After Clear,
    Count    : 0
    Values:
 */

Plattformen

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile für Pocket PC, Windows Mobile für Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.

Versionsinformationen

.NET Framework

Unterstützt in: 2.0, 1.1, 1.0

.NET Compact Framework

Unterstützt in: 2.0

Siehe auch

Referenz

Stack-Klasse
Stack-Member
System.Collections-Namespace