ContainerControl.ActiveControl 속성
컨테이너 컨트롤에 있는 활성 컨트롤을 가져오거나 설정합니다.
네임스페이스: System.Windows.Forms
어셈블리: System.Windows.Forms(system.windows.forms.dll)
구문
‘선언
Public Property ActiveControl As Control
‘사용 방법
Dim instance As ContainerControl
Dim value As Control
value = instance.ActiveControl
instance.ActiveControl = value
public Control ActiveControl { get; set; }
public:
virtual property Control^ ActiveControl {
Control^ get () sealed;
void set (Control^ value) sealed;
}
/** @property */
public final Control get_ActiveControl ()
/** @property */
public final void set_ActiveControl (Control value)
public final function get ActiveControl () : Control
public final function set ActiveControl (value : Control)
속성 값
ContainerControl에서 현재 활성 상태에 있는 Control입니다.
예외
| 예외 형식 | 조건 |
|---|---|
할당된 Control을 활성화할 수 없는 경우 |
설명
ActiveControl 속성은 컨테이너 컨트롤에 있는 활성 컨트롤을 활성화하거나 검색합니다.
이 속성에서 올바른 값을 받으려면 이 속성을 호출하는 개체는 호출하는 컨트롤을 포함하거나 호출하는 컨트롤에 포함되어야 합니다. 한 폼이 다른 폼의 ActiveControl 속성을 호출하는 경우 해당 폼은 정의되지 않은 값을 받습니다. 이 경우 폼 사이의 통신 메커니즘을 직접 정의하여 이 데이터를 전달해야 합니다.
예제
다음 코드 예제에서는 ScrollableControl 클래스에서 상속하여 IContainerControl 인터페이스를 구현합니다. ActiveControl 속성 및 ActivateControl 메서드에 구현이 추가됩니다.
Imports System
Imports System.Windows.Forms
Imports System.Drawing
Public Class MyContainerControl
Inherits ScrollableControl
Implements IContainerControl
Private myActiveControl As Control
Public Sub New()
' Make the container control Blue so it can be distinguished on the form.
Me.BackColor = Color.Blue
' Make the container scrollable.
Me.AutoScroll = True
End Sub
' Add implementation to the IContainerControl.ActiveControl property.
Public Property ActiveControl() As Control Implements IContainerControl.ActiveControl
Get
Return Me.myActiveControl
End Get
Set
' Make sure the control is a member of the ControlCollection.
If Me.Controls.Contains(value) Then
Me.myActiveControl = value
End If
End Set
End Property
' Add implementation to the IContainerControl.ActivateControl(Control) method.
public Function ActivateControl(active As Control) As Boolean Implements IContainerControl.ActivateControl
If Me.Controls.Contains(active) Then
' Select the control and scroll the control into view if needed.
active.Select()
Me.ScrollControlIntoView(active)
Me.myActiveControl = active
Return True
End If
Return False
End Function
End Class
using System;
using System.Windows.Forms;
using System.Drawing;
public class MyContainer : ScrollableControl, IContainerControl
{
private Control activeControl;
public MyContainer()
{
// Make the container control Blue so it can be distinguished on the form.
this.BackColor = Color.Blue;
// Make the container scrollable.
this.AutoScroll = true;
}
// Add implementation to the IContainerControl.ActiveControl property.
public Control ActiveControl
{
get
{
return activeControl;
}
set
{
// Make sure the control is a member of the ControlCollection.
if(this.Controls.Contains(value))
{
activeControl = value;
}
}
}
// Add implementations to the IContainerControl.ActivateControl(Control) method.
public bool ActivateControl(Control active)
{
if(this.Controls.Contains(active))
{
// Select the control and scroll the control into view if needed.
active.Select();
this.ScrollControlIntoView(active);
this.activeControl = active;
return true;
}
return false;
}
}
using namespace System;
using namespace System::Windows::Forms;
using namespace System::Drawing;
public ref class MyContainer: public ScrollableControl, public IContainerControl
{
private:
Control^ activeControl;
public:
MyContainer()
{
// Make the container control Blue so it can be distinguished on the form.
this->BackColor = Color::Blue;
// Make the container scrollable.
this->AutoScroll = true;
}
property Control^ ActiveControl
{
// Add implementation to the IContainerControl.ActiveControl property.
virtual Control^ get()
{
return activeControl;
}
virtual void set( Control^ value )
{
// Make sure the control is a member of the ControlCollection.
if ( this->Controls->Contains( value ) )
{
activeControl = value;
}
}
}
// Add implementations to the IContainerControl.ActivateControl(Control) method.
virtual bool ActivateControl( Control^ active )
{
if ( this->Controls->Contains( active ) )
{
// Select the control and scroll the control into view if needed.
active->Select( );
this->ScrollControlIntoView( active );
this->activeControl = active;
return true;
}
return false;
}
};
import System.*;
import System.Windows.Forms.*;
import System.Drawing.*;
public class MyContainer extends ScrollableControl implements IContainerControl
{
private Control activeControl;
public MyContainer()
{
// Make the container control Blue so it can be
// distinguished on the form.
this.set_BackColor(Color.get_Blue());
// Make the container scrollable.
this.set_AutoScroll(true);
} //MyContainer
// Add implementation to the IContainerControl.ActiveControl property.
/** @property
*/
public Control get_ActiveControl()
{
return activeControl;
} //get_ActiveControl
/** @property
*/
public void set_ActiveControl(Control value)
{
// Make sure the control is a member of the ControlCollection.
if (this.get_Controls().Contains(value)) {
activeControl = value;
}
} //set_ActiveControl
// Add implementations to the IContainerControl.
// ActivateControl(Control) method.
public boolean ActivateControl(Control active)
{
if (this.get_Controls().Contains(active)) {
// Select the control and scroll the control into view if needed.
active.Select();
this.ScrollControlIntoView(active);
this.activeControl = active;
return true;
}
return false;
} //ActivateControl
} //MyContainer
플랫폼
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
.NET Framework에서 모든 플래폼의 모든 버전을 지원하지는 않습니다. 지원되는 버전의 목록은 시스템 요구 사항을 참조하십시오.
버전 정보
.NET Framework
2.0, 1.1, 1.0에서 지원
참고 항목
참조
ContainerControl 클래스
ContainerControl 멤버
System.Windows.Forms 네임스페이스
ScrollableControl
Control