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ContainerControl.ContainerControl Constructor

Initializes a new instance of the ContainerControl class.

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in system.windows.forms.dll)

public ContainerControl ()
public ContainerControl ()
public function ContainerControl ()
Not applicable.

The following code example inherits from the ScrollableControl class and implements the IContainerControl interface. Implementation is added to the ActiveControl property and the ActivateControl method.

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;
		}
	}

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

Windows 98, Windows Server 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

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

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