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ButtonBase类继承并IButtonControl实现接口。The following example inherits from the ButtonBase class and implements the IButtonControl interface. 将实现添加到DialogResult属性NotifyDefault和和PerformClick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.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

例如, 默认情况下, 可以使用此接口来处理此接口。An example of where this interface might be implemented is default and cancel button processing. 当为窗体输入未处理的 ENTER 键时, 将会通知默认按钮, 就像对话框关闭一样。Default buttons are notified when an unprocessed ENTER key is entered for a form, just like a dialog box would be closed. 同样, 只要在窗体上输入了未处理的 ESC 键, 就会收到 "取消" 按钮的通知, 这与对话框的效果非常类似。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

在充当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, 如DialogResult向父窗体提供或Click执行事件的功能, 或者充当窗体的默认按钮。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