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Ruft die Modifiziererflags für ein KeyDown-Ereignis oder ein KeyUp-Ereignis ab. Die Flags geben an, welche Kombination aus STRG, UMSCHALTTASTE und ALT gedrückt wurde.
Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in system.windows.forms.dll)
Syntax
'Declaration
Public ReadOnly Property Modifiers As Keys
'Usage
Dim instance As KeyEventArgs
Dim value As Keys
value = instance.Modifiers
public Keys Modifiers { get; }
public:
property Keys Modifiers {
Keys get ();
}
/** @property */
public Keys get_Modifiers ()
public function get Modifiers () : Keys
Eigenschaftenwert
Ein Keys-Wert, der mindestens ein Modifiziererflag darstellt.
Hinweise
Verwenden Sie die Control-Eigenschaft, die Shift-Eigenschaft und die Alt-Eigenschaft, um festzustellen, ob eine bestimmte Modifizierertaste gedrückt wurde. Modifiziererflags können mit dem bitweisen OR-Operator kombiniert werden.
Beispiel
Im folgenden Codebeispiel wird veranschaulicht, wie mithilfe der Modifiers-Eigenschaft bestimmt werden kann, welche Modifizierertasten zusammen mit dem Primärtaste gedrückt wurden.
' This example demonstrates how to use the KeyDown event with the Help class to display
' pop-up style help to the user of the application. The example filters for all variations
' of pressing the F1 key with a modifier key by using the KeyEventArgs properties passed
' to the event-handler method.
' When the user presses any variation of F1 that includes any keyboard modifier, the Help
' class displays a pop-up window, similar to a ToolTip, near the control. If the user presses
' ALT + F2, a different Help pop-up is displayed with additional information. This example assumes
' that a TextBox control, named textBox1, has been added to the form and its KeyDown
' event has been contected to this event-handler method.
Private Sub textBox1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles textBox1.KeyDown
' Determine whether the key entered is the F1 key. If it is, display Help.
If e.KeyCode = Keys.F1 AndAlso (e.Alt OrElse e.Control OrElse e.Shift) Then
' Display a pop-up Help topic to assist the user.
Help.ShowPopup(textBox1, "Enter your name.", New Point(textBox1.Bottom, textBox1.Right))
ElseIf e.KeyCode = Keys.F2 AndAlso e.Modifiers = Keys.Alt Then
' Display a pop-up Help topic to provide additional assistance to the user.
Help.ShowPopup(textBox1, "Enter your first name followed by your last name. Middle name is optional.", _
New Point(textBox1.Top, Me.textBox1.Left))
End If
End Sub 'textBox1_KeyDown
// This example demonstrates how to use the KeyDown event with the Help class to display
// pop-up style help to the user of the application. The example filters for all variations
// of pressing the F1 key with a modifier key by using the KeyEventArgs properties passed
// to the event-handler method.
// When the user presses any variation of F1 that includes any keyboard modifier, the Help
// class displays a pop-up window, similar to a ToolTip, near the control. If the user presses
// ALT + F2, a different Help pop-up is displayed with additional information. This example assumes
// that a tTextBox control, named textBox1, has been added to the form and its KeyDown
// event has been contected to this event-handler method.
private void textBox1_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e)
{
// Determine whether the key entered is the F1 key. If it is, display Help.
if(e.KeyCode == Keys.F1 && (e.Alt || e.Control || e.Shift))
{
// Display a pop-up Help topic to assist the user.
Help.ShowPopup(textBox1, "Enter your name.", new Point(textBox1.Bottom, textBox1.Right));
}
else if(e.KeyCode == Keys.F2 && e.Modifiers == Keys.Alt)
{
// Display a pop-up Help topic to provide additional assistance to the user.
Help.ShowPopup(textBox1, "Enter your first name followed by your last name. Middle name is optional.",
new Point(textBox1.Top, this.textBox1.Left));
}
}
// This example demonstrates how to use the KeyDown event with the Help class to display
// pop-up style help to the user of the application. The example filters for all variations
// of pressing the F1 key with a modifier key by using the KeyEventArgs properties passed
// to the event handling method.
// When the user presses any variation of F1 that includes any keyboard modifier, the Help
// class displays a pop-up window, similar to a ToolTip, near the control. If the user presses
// ALT + F2, a different Help pop-up is displayed with additional information. This example assumes
// that a tTextBox control, named textBox1, has been added to the form and its KeyDown
// event has been contected to this event handling method.
private:
void textBox1_KeyDown( Object^ /*sender*/, System::Windows::Forms::KeyEventArgs^ e )
{
// Determine whether the key entered is the F1 key. If it is, display Help.
if ( e->KeyCode == Keys::F1 && (e->Alt || e->Control || e->Shift) )
{
// Display a pop-up Help topic to assist the user.
Help::ShowPopup( textBox1, "Enter your name.", Point(textBox1->Bottom,textBox1->Right) );
}
else
if ( e->KeyCode == Keys::F2 && e->Modifiers == Keys::Alt )
{
// Display a pop-up Help topic to provide additional assistance to the user.
Help::ShowPopup( textBox1, "Enter your first name followed by your last name. Middle name is optional.",
Point(textBox1->Top,this->textBox1->Left) );
}
}
// This example demonstrates how to use the KeyDown event with the Help
// class to display pop-up style help to the user of the application.
// The example filters for all variations of pressing the F1 key with
// a modifier key by using the KeyEventArgs properties passed to the
// event handling method.When the user presses any variation of F1 that
// includes any keyboard modifier, the Help class displays a pop-up window,
// similar to a ToolTip, near the control. If the user presses ALT + F2,
// a different Help pop-up is displayed with additional information.
// This example assumes that a tTextBox control, named textBox1, has been
// added to the form and its KeyDown event has been contected to this
// event handling method.
private void textBox1_KeyDown(Object sender,
System.Windows.Forms.KeyEventArgs e)
{
// Determine whether the key entered is the F1 key.
//If it is, display Help.
if (e.get_KeyCode().Equals(Keys.F1) && (e.get_Alt() || e.get_Control()
|| e.get_Shift())) {
// Display a pop-up Help topic to assist the user.
Help.ShowPopup(textBox1, "Enter your name.", new Point(textBox1.
get_Bottom(), textBox1.get_Right()));
}
else {
if (e.get_KeyCode().Equals(Keys.F2) && e.get_Modifiers().
Equals(Keys.Alt)) {
// Display a pop-up Help topic to provide additional assistance
// to the user.
Help.ShowPopup(textBox1, "Enter your first name followed by"
+ " your last name.Middle name is optional.",new Point(
textBox1.get_Top(), this.textBox1.get_Left()));
}
}
} //textBox1_KeyDown
} //Form1
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, 1.0
Siehe auch
Referenz
KeyEventArgs-Klasse
KeyEventArgs-Member
System.Windows.Forms-Namespace
KeyEventArgs.Alt-Eigenschaft
KeyEventArgs.Control-Eigenschaft
Shift
Control.ModifierKeys-Eigenschaft