IContainerControl Antarmuka

Definisi

Ruang nama:

System.Windows.Forms

Rakitan:

System.Windows.Forms.dll

Sumber:

IContainerControl.cs

Menyediakan fungsionalitas agar kontrol bertindak sebagai induk untuk kontrol lain.

public interface class IContainerControl

public interface IContainerControl

type IContainerControl = interface

Public Interface IContainerControl

Turunan

System.Windows.Forms.ContainerControl

Contoh

Contoh berikut mewarisi dari ScrollableControl kelas dan mengimplementasikan IContainerControl antarmuka. Implementasi ditambahkan ke ActiveControl properti dan ActivateControl metode .

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;
   }
};

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;
        }
    }

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

Catatan Bagi Implementer

Terapkan antarmuka ini di kelas yang ingin Anda indukkan kumpulan kontrolnya. Anggota antarmuka ini memungkinkan Anda mengaktifkan kontrol anak, atau menentukan kontrol mana yang saat ini aktif. Saat diimplementasikan di kelas, ActivateControl(Control) mengambil Control sebagai parameter dan mengaktifkan kontrol yang ditentukan. Properti ActiveControl mengaktifkan atau mengambil kontrol yang aktif.

Dalam skenario yang paling umum, Anda tidak perlu langsung menerapkan antarmuka ini. Misalnya, jika Anda membuat proyek Pustaka Kontrol Windows, Visual Studio menghasilkan kelas awal untuk Anda. Kelas itu mewarisi dari UserControl kelas, dan UserControl mengimplementasikan IContainerControl untuk Anda.

Properti

Nama	Deskripsi
ActiveControl	Mendapatkan atau mengatur kontrol yang aktif pada kontrol kontainer.

Metode

Nama	Deskripsi
ActivateControl(Control)	Mengaktifkan kontrol yang ditentukan.

Lihat juga

• ContainerControl
• Control