Control.OnKeyUp メソッドとは? わかりやすく解説

Control.OnKeyUp メソッド

KeyUp イベント発生させます

名前空間: System.Windows.Forms
アセンブリ: System.Windows.Forms (system.windows.forms.dll 内)
構文構文

Protected Overridable Sub
 OnKeyUp ( _
    e As KeyEventArgs _
)
Dim e As KeyEventArgs

Me.OnKeyUp(e)
protected virtual void OnKeyUp (
    KeyEventArgs e
)
protected:
virtual void OnKeyUp (
    KeyEventArgs^ e
)
protected void OnKeyUp (
    KeyEventArgs e
)
protected function OnKeyUp (
    e : KeyEventArgs
)

パラメータ

e

イベント データ格納している KeyEventArgs。

解説解説
使用例使用例

KeyUp イベントHelp クラス使用してポップアップ スタイルヘルプユーザー表示するコード例次に示します

' This example demonstrates how to use the KeyUp event with the Help
 class to display
' pop-up style help to the user of the application. When the user presses
 F1, the Help
' class displays a pop-up window, similar to a ToolTip, near the control.
 This example assumes
' that a TextBox control, named textBox1, has been added to the form
 and its KeyUp
' event has been contected to this event handler method.
Private Sub textBox1_KeyUp(ByVal
 sender As Object, ByVal
 e As System.Windows.Forms.KeyEventArgs) Handles textBox1.KeyUp
    ' Determine whether the key entered is the F1 key. Display help
 if it is.
    If e.KeyCode = Keys.F1 Then
        ' Display a pop-up help topic to assist the user.
        Help.ShowPopup(textBox1, "Enter your first name",
 New Point(textBox1.Right, Me.textBox1.Bottom))
    End If
End Sub 'textBox1_KeyUp
// This example demonstrates how to use the KeyUp event with the Help
 class to display
// pop-up style help to the user of the application. When the user presses
 F1, the Help
// class displays a pop-up window, similar to a ToolTip, near the control.
 This example assumes
// that a TextBox control, named textBox1, has been added to the form
 and its KeyUp
// event has been contected to this event handler method.
private void textBox1_KeyUp(object sender,
 System.Windows.Forms.KeyEventArgs e)
{
    // Determine whether the key entered is the F1 key. Display help
 if it is.
    if(e.KeyCode == Keys.F1)
    {
        // Display a pop-up help topic to assist the user.
        Help.ShowPopup(textBox1, "Enter your first name", new
 Point(textBox1.Right, this.textBox1.Bottom));
    }
}
   // This example demonstrates how to use the KeyUp event with the Help
 class to display
   // pop-up style help to the user of the application. When the user presses
 F1, the Help
   // class displays a pop-up window, similar to a ToolTip, near the control.
 This example assumes
   // that a TextBox control, named textBox1, has been added to the form
 and its KeyUp
   // event has been connected to this event handler method.
private:
   void textBox1_KeyUp( Object^ /*sender*/, System::Windows::Forms::KeyEventArgs^
 e )
   {
      
      // Determine whether the key entered is the F1 key. Display help
 if it is.
      if ( e->KeyCode == Keys::F1 )
      {
         
         // Display a pop-up help topic to assist the user.
         Help::ShowPopup( textBox1, "Enter your first name", Point(textBox1->Right,this->textBox1->Bottom)
 );
      }
   }
// This example demonstrates how to use the KeyUp event with the Help
 
// class to display pop-up style help to the user of the application.
 
// When the user presses F1, the Help class displays a pop-up window,
 
// similar to a ToolTip, near the control. This example assumes that
 a 
// TextBox control, named textBox1, has been added to the form and its
 
// KeyUp event has been contected to this event handler method.
private void textBox1_KeyUp(Object sender,
 
    System.Windows.Forms.KeyEventArgs e)
{
    // Determine whether the key entered is the F1 key. 
    // Display help if it is.
    if (e.get_KeyCode().Equals(Keys.F1)) {
        // Display a pop-up help topic to assist the user.
        Help.ShowPopup(textBox1, "Enter your first name", 
            new Point(textBox1.get_Right(), this.textBox1.get_Bottom()));
    }
} //textBox1_KeyUp
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