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ConsoleSpecialKey-Enumeration

Hinweis: Diese Enumeration ist neu in .NET Framework, Version 2.0.

Gibt Kombinationen von Modifizierer- und Konsolentasten an, mit denen der derzeit ausgeführte Prozess unterbrochen werden kann.

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

[SerializableAttribute] 
public enum ConsoleSpecialKey
/** @attribute SerializableAttribute() */ 
public enum ConsoleSpecialKey
SerializableAttribute 
public enum ConsoleSpecialKey

 MembernameBeschreibung
ControlBreakDie Modifizierertaste ConsoleModifiers.Control und die Konsolentaste UNTBR. 
ControlCDie Modifizierertaste ConsoleModifiers.Control und die Konsolentaste ConsoleKey.C

Die ConsoleCancelEventArgs.SpecialKey-Eigenschaft gibt den ConsoleSpecialKey-Enumerationstyp zurück.

Durch gleichzeitiges Drücken bestimmter Tastenkombinationen wird das Betriebssystem angewiesen, den gerade ausgeführten Prozess zu unterbrechen. Die zwei gültigen Tastenkombinationen sind ConsoleModifiers.Control und UNTBR (STRG+UNTBR) sowie ConsoleModifiers.Control und ConsoleKey.C (STRG+C).

Im folgenden Codebeispiel wird der Wert ConsoleSpecialKey angezeigt, der den zugeordneten Ereignishandler aufruft.

// This example demonstrates:
// the Console.CancelKeyPress event,
// the ConsoleCancelEventHandler delegate, 
// the ConsoleCancelEventArgs.SpecialKey property, and 
// the ConsoleCancelEventArgs.Cancel property.

using System;

class Sample 
{
    public static void Main()
    {
    ConsoleKeyInfo cki;

// Clear the screen.
    Console.Clear();

// Turn off the default system behavior when CTRL+C is pressed. When 
// Console.TreatControlCAsInput is false, CTRL+C is treated as an
// interrupt instead of as input.
    Console.TreatControlCAsInput = false;

// Establish an event handler to process key press events.
    Console.CancelKeyPress += new ConsoleCancelEventHandler(myHandler);
    while (true)
        {
// Prompt the user.
        Console.Write("Press any key, or 'X' to quit, or ");
        Console.WriteLine("CTRL+C to interrupt the read operation:");

// Start a console read operation. Do not display the input.
        cki = Console.ReadKey(true);

// Announce the name of the key that was pressed .
        Console.WriteLine("  Key pressed: {0}\n", cki.Key);

// Exit if the user pressed the 'X' key.
        if (cki.Key == ConsoleKey.X) break;
        }
    }

/*
   When you press CTRL+C, the read operation is interrupted and the 
   console cancel event handler, myHandler, is invoked. Upon entry 
   to the event handler, the Cancel property is false, which means 
   the current process will terminate when the event handler terminates. 
   However, the event handler sets the Cancel property to true, which 
   means the process will not terminate and the read operation will resume.
*/
    protected static void myHandler(object sender, ConsoleCancelEventArgs args)
    {
// Announce that the event handler has been invoked.
    Console.WriteLine("\nThe read operation has been interrupted.");

// Announce which key combination was pressed.
    Console.WriteLine("  Key pressed: {0}", args.SpecialKey);

// Announce the initial value of the Cancel property.
    Console.WriteLine("  Cancel property: {0}", args.Cancel);

// Set the Cancel property to true to prevent the process from terminating.
    Console.WriteLine("Setting the Cancel property to true...");
    args.Cancel = true;

// Announce the new value of the Cancel property.
    Console.WriteLine("  Cancel property: {0}", args.Cancel);
    Console.WriteLine("The read operation will resume...\n");
    }
}
/*
This code example produces results similar to the following text:

Press any key, or 'X' to quit, or CTRL+C to interrupt the read operation:
  Key pressed: J

Press any key, or 'X' to quit, or CTRL+C to interrupt the read operation:
  Key pressed: Enter

Press any key, or 'X' to quit, or CTRL+C to interrupt the read operation:

The read operation has been interrupted.
  Key pressed: ControlC
  Cancel property: False
Setting the Cancel property to true...
  Cancel property: True
The read operation will resume...

  Key pressed: Q

Press any key, or 'X' to quit, or CTRL+C to interrupt the read operation:
  Key pressed: X

*/

Windows 98, Windows 2000 SP4, Windows Millennium Edition, 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.

.NET Framework

Unterstützt in: 2.0
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