IButtonControl IButtonControl IButtonControl IButtonControl Interface

定义

允许控件用作窗体上的按钮。Allows a control to act like a button on a form.

public interface class IButtonControl
public interface IButtonControl
type IButtonControl = interface
Public Interface IButtonControl
派生

示例

下面的示例从继承ButtonBase类并实现IButtonControl接口。The following example inherits from the ButtonBase class and implements the IButtonControl interface. 实现添加到DialogResult属性和NotifyDefaultPerformClick方法。Implementation is added to the DialogResult property and the NotifyDefault and PerformClick methods.

#using <System.dll>
#using <System.Drawing.dll>
#using <System.Windows.Forms.dll>

using namespace System;
using namespace System::Windows::Forms;
using namespace System::Drawing;

public ref class MyButton: public ButtonBase, public IButtonControl
{
private:
   System::Windows::Forms::DialogResult myDialogResult;

public:
   MyButton()
   {
      // Make the button White and a Popup style
      // so it can be distinguished on the form.
      this->FlatStyle = ::FlatStyle::Popup;
      this->BackColor = Color::White;
   }

   property System::Windows::Forms::DialogResult DialogResult 
   {
      // Add implementation to the IButtonControl.DialogResult property.
      virtual System::Windows::Forms::DialogResult get()
      {
         return this->myDialogResult;
      }

      virtual void set( System::Windows::Forms::DialogResult value )
      {
         if ( Enum::IsDefined( System::Windows::Forms::DialogResult::typeid, value ) )
         {
            this->myDialogResult = value;
         }
      }
   }

   // Add implementation to the IButtonControl.NotifyDefault method.
   virtual void NotifyDefault( bool value )
   {
      if ( this->IsDefault != value )
      {
         this->IsDefault = value;
      }
   }

   // Add implementation to the IButtonControl.PerformClick method.
   virtual void PerformClick()
   {
      if ( this->CanSelect )
      {
         this->OnClick( EventArgs::Empty );
      }
   }
};
using System;
using System.Windows.Forms;
using System.Drawing;

public class MyButton : ButtonBase, IButtonControl
{
	private DialogResult myDialogResult;

	public MyButton()
	{
		// Make the button White and a Popup style
		// so it can be distinguished on the form.
		this.FlatStyle = FlatStyle.Popup;
		this.BackColor = Color.White;
	}
		
	// Add implementation to the IButtonControl.DialogResult property.
	public DialogResult DialogResult
	{
		get
		{
			return this.myDialogResult;
		}

		set
		{
			if(Enum.IsDefined(typeof(DialogResult), value))				
			{
				this.myDialogResult = value;
			}
		}	
	}

	// Add implementation to the IButtonControl.NotifyDefault method.
	public void NotifyDefault(bool value)
	{
		if(this.IsDefault != value)
		{
			this.IsDefault = value;
		}
	}

	// Add implementation to the IButtonControl.PerformClick method.
	public void PerformClick()
	{
		if(this.CanSelect)
		{
			this.OnClick(EventArgs.Empty);
		}
	}
}
Imports System
Imports System.Windows.Forms
Imports System.Drawing


Public Class MyButton
   Inherits ButtonBase
   Implements IButtonControl 
   Private myDialogResult As DialogResult
      
   Public Sub New()
      ' Make the button White and a Popup style
      ' so it can be distinguished on the form.
      Me.FlatStyle = FlatStyle.Popup
      Me.BackColor = Color.White
   End Sub
   
   ' Add implementation to the IButtonControl.DialogResult property.
   Public Property DialogResult() As DialogResult Implements IButtonControl.DialogResult
      Get
         Return Me.myDialogResult
      End Get
      
      Set
         If [Enum].IsDefined(GetType(DialogResult), value) Then
            Me.myDialogResult = value
         End If
      End Set
   End Property
   
   ' Add implementation to the IButtonControl.NotifyDefault method.
   Public Sub NotifyDefault(value As Boolean) Implements IButtonControl.NotifyDefault
      If Me.IsDefault <> value Then
         Me.IsDefault = value
      End If
   End Sub 
      
   ' Add implementation to the IButtonControl.PerformClick method.
   Public Sub PerformClick() Implements IButtonControl.PerformClick
      If Me.CanSelect Then
         Me.OnClick(EventArgs.Empty)
      End If
   End Sub

End Class

注解

此接口可能实现的一个示例是默认值和取消按钮的处理。An example of where this interface might be implemented is default and cancel button processing. 为窗体,就像将关闭对话框中输入未经处理的 ENTER 键时,会收到通知默认按钮。Default buttons are notified when an unprocessed ENTER key is entered for a form, just like a dialog box would be closed. 同样,取消按钮会收到通知,每当未处理的 ESC 键输入窗体上更像一个对话框将关闭。Similarly, cancel buttons are notified whenever an unprocessed ESC key is entered on a form, much like a dialog box would be dismissed.

实施者说明

在用作按钮控件的类中实现此接口。Implement this interface in classes that act as button controls. 此接口的成员将提供基本按钮功能,例如提供DialogResult到父窗体或执行的能力Click事件或作为窗体的默认按钮。The members of this interface will provide basic button functionality, such as providing a DialogResult to the parent form or the ability to perform a Click event, or acting as the default button of a form.

属性

DialogResult DialogResult DialogResult DialogResult

获取或设置单击按钮时返回给父窗体的值。Gets or sets the value returned to the parent form when the button is clicked.

方法

NotifyDefault(Boolean) NotifyDefault(Boolean) NotifyDefault(Boolean) NotifyDefault(Boolean)

通知某个控件是默认按钮,以便相应调整其外观和行为。Notifies a control that it is the default button so that its appearance and behavior is adjusted accordingly.

PerformClick() PerformClick() PerformClick() PerformClick()

为该控件生成 Click 事件。Generates a Click event for the control.

适用于

另请参阅