Form.CancelButton Form.CancelButton Form.CancelButton Form.CancelButton Property

Определение

Возвращает или задает кнопку, которая срабатывает при нажатии клавиши ESC.Gets or sets the button control that is clicked when the user presses the ESC key.

public:
 property System::Windows::Forms::IButtonControl ^ CancelButton { System::Windows::Forms::IButtonControl ^ get(); void set(System::Windows::Forms::IButtonControl ^ value); };
public System.Windows.Forms.IButtonControl CancelButton { get; set; }
member this.CancelButton : System.Windows.Forms.IButtonControl with get, set
Public Property CancelButton As IButtonControl

Значение свойства

Объект IButtonControl, который представляет кнопку "Отмена" для формы.An IButtonControl that represents the cancel button for the form.

Примеры

В следующем примере создается новый экземпляр класса Form и ShowDialog вызывается метод для вывода формы в виде диалогового окна.The following example creates a new instance of a Form and calls the ShowDialog method to display the form as a dialog box. FormBorderStyleВ примере задаются свойства CancelButton, MinimizeBox AcceptButton, MaximizeBox,, StartPosition и, чтобы изменить внешний вид и функциональность формы на диалоговое окно.The example sets the FormBorderStyle, AcceptButton, CancelButton, MinimizeBox, MaximizeBox, and StartPosition properties to change the appearance and functionality of the form to a dialog box. В примере также используется Add метод Controls коллекции формы для добавления двух Button элементов управления.The example also uses the Add method of the form's Controls collection to add two Button controls. В примере HelpButton свойство используется для вывода кнопки справки в строке заголовка диалогового окна.The example uses the HelpButton property to display a help button in the caption bar of the dialog box.

public:
   void CreateMyForm()
   {
      // Create a new instance of the form.
      Form^ form1 = gcnew Form;
      // Create two buttons to use as the accept and cancel buttons.
      Button^ button1 = gcnew Button;
      Button^ button2 = gcnew Button;
      
      // Set the text of button1 to "OK".
      button1->Text = "OK";
      // Set the position of the button on the form.
      button1->Location = Point(10,10);
      // Set the text of button2 to "Cancel".
      button2->Text = "Cancel";
      // Set the position of the button based on the location of button1.
      button2->Location =
         Point( button1->Left, button1->Height + button1->Top + 10 );
      // Set the caption bar text of the form.   
      form1->Text = "My Dialog Box";
      // Display a help button on the form.
      form1->HelpButton = true;
      
      // Define the border style of the form to a dialog box.
      form1->FormBorderStyle = ::FormBorderStyle::FixedDialog;
      // Set the MaximizeBox to false to remove the maximize box.
      form1->MaximizeBox = false;      
      // Set the MinimizeBox to false to remove the minimize box.
      form1->MinimizeBox = false;
      // Set the accept button of the form to button1.
      form1->AcceptButton = button1;
      // Set the cancel button of the form to button2.
      form1->CancelButton = button2;
      // Set the start position of the form to the center of the screen.
      form1->StartPosition = FormStartPosition::CenterScreen;
      
      // Add button1 to the form.
      form1->Controls->Add( button1 );
      // Add button2 to the form.
      form1->Controls->Add( button2 );
      // Display the form as a modal dialog box.
      form1->ShowDialog();
   }
public void CreateMyForm()
{
   // Create a new instance of the form.
   Form form1 = new Form();
   // Create two buttons to use as the accept and cancel buttons.
   Button button1 = new Button ();
   Button button2 = new Button ();
  
   // Set the text of button1 to "OK".
   button1.Text = "OK";
   // Set the position of the button on the form.
   button1.Location = new Point (10, 10);
   // Set the text of button2 to "Cancel".
   button2.Text = "Cancel";
   // Set the position of the button based on the location of button1.
   button2.Location
      = new Point (button1.Left, button1.Height + button1.Top + 10);
   // Set the caption bar text of the form.   
   form1.Text = "My Dialog Box";
   // Display a help button on the form.
   form1.HelpButton = true;

   // Define the border style of the form to a dialog box.
   form1.FormBorderStyle = FormBorderStyle.FixedDialog;
   // Set the MaximizeBox to false to remove the maximize box.
   form1.MaximizeBox = false;
   // Set the MinimizeBox to false to remove the minimize box.
   form1.MinimizeBox = false;
   // Set the accept button of the form to button1.
   form1.AcceptButton = button1;
   // Set the cancel button of the form to button2.
   form1.CancelButton = button2;
   // Set the start position of the form to the center of the screen.
   form1.StartPosition = FormStartPosition.CenterScreen;
   
   // Add button1 to the form.
   form1.Controls.Add(button1);
   // Add button2 to the form.
   form1.Controls.Add(button2);
   
   // Display the form as a modal dialog box.
   form1.ShowDialog();
}
Public Sub CreateMyForm()
    ' Create a new instance of the form.
    Dim form1 As New Form()
    ' Create two buttons to use as the accept and cancel buttons.
    Dim button1 As New Button()
    Dim button2 As New Button()
       
    ' Set the text of button1 to "OK".
    button1.Text = "OK"
    ' Set the position of the button on the form.
    button1.Location = New Point(10, 10)
    ' Set the text of button2 to "Cancel".
    button2.Text = "Cancel"
    ' Set the position of the button based on the location of button1.
    button2.Location = _
       New Point(button1.Left, button1.Height + button1.Top + 10)
    ' Set the caption bar text of the form.   
    form1.Text = "My Dialog Box"
    ' Display a help button on the form.
    form1.HelpButton = True
       
    ' Define the border style of the form to a dialog box.
    form1.FormBorderStyle = FormBorderStyle.FixedDialog
    ' Set the MaximizeBox to false to remove the maximize box.
    form1.MaximizeBox = False
    ' Set the MinimizeBox to false to remove the minimize box.
    form1.MinimizeBox = False
    ' Set the accept button of the form to button1.
    form1.AcceptButton = button1
    ' Set the cancel button of the form to button2.
    form1.CancelButton = button2
    ' Set the start position of the form to the center of the screen.
    form1.StartPosition = FormStartPosition.CenterScreen
       
    ' Add button1 to the form.
    form1.Controls.Add(button1)
    ' Add button2 to the form.
    form1.Controls.Add(button2)
       
    ' Display the form as a modal dialog box.
    form1.ShowDialog()
End Sub

Комментарии

Кнопка отмены для формы — это элемент управления "Кнопка", который щелкнул каждый раз, когда пользователь нажимает клавишу ESC.The cancel button for a form is the button control that is clicked whenever the user presses the ESC key. Кнопка, назначенная этому свойству, должна IButtonControl иметь значение, находящееся в текущей форме или расположенном в контейнере в текущей форме.The button assigned to this property must be an IButtonControl that is on the current form or located within a container on the current form.

Это свойство позволяет назначить действие по умолчанию, выполняемое при нажатии пользователем клавиши ESC в приложении.This property allows you to designate a default action to occur when the user presses the ESC key in your application. Это свойство позволяет пользователю быстро перемещаться по простой форме, позволяя просто нажать клавишу ESC, чтобы закрыть окно без фиксации изменений вместо того, чтобы вручную нажимать кнопку "Отмена" с помощью мыши.You can use this property to allow the user to quickly navigate a simple form by allowing them to simply press the ESC key to close a window without committing changes instead of manually clicking the cancel button with their mouse.

CancelButtonможет не работать, если другой элемент управления в форме перехватывает клавишу ESC.CancelButton may not work if another control on the form intercepts the ESC key. Например, если ComboBox в форме открыто окно, ESC ComboBox закроет вместо закрытия формы.For example, if you have a ComboBox open on your form, ESC will close the ComboBox instead of closing the Form.

Объект, которому назначено значение CancelButton , должен быть видимым в форме, иначе нажатие клавиши ESC не вызовет никаких последствий. IButtonControlThe IButtonControl object assigned to CancelButton must be visible on the form, or else pressing the ESC key will have no effect.

Применяется к

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