Control.ControlAdded Event

Occurs when a new control is added to the Control.ControlCollection.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

[BrowsableAttribute(true)]
public event ControlEventHandler ControlAdded

For more information about handling events, see Handling and Raising Events.

The following code example uses ControlAdded to add a control to a form and displays the name of the added control in a MessageBox.

// This example demonstrates the use of the ControlAdded and 
// ControlRemoved events. This example assumes that two Button controls 
// are added to the form and connected to the addControl_Click and 
// removeControl_Click event-handler methods. 
private void Form1_Load(object sender, System.EventArgs e)
{
    // Connect the ControlRemoved and ControlAdded event handlers 
    // to the event-handler methods. 
    // ControlRemoved and ControlAdded are not available at design time. 
    this.ControlRemoved += new System.Windows.Forms.ControlEventHandler(this.Control_Removed);
    this.ControlAdded += new System.Windows.Forms.ControlEventHandler(this.Control_Added);
}

private void Control_Added(object sender, System.Windows.Forms.ControlEventArgs e)
{
    MessageBox.Show("The control named " + e.Control.Name + " has been added to the form.");
}

private void Control_Removed(object sender, System.Windows.Forms.ControlEventArgs e)
{
    MessageBox.Show("The control named " + e.Control.Name + " has been removed from the form.");
}

// Click event handler for a Button control. Adds a TextBox to the form. 
private void addControl_Click(object sender, System.EventArgs e)
{
    // Create a new TextBox control and add it to the form.
    TextBox textBox1 = new TextBox();
    textBox1.Size = new Size(100,10);
    textBox1.Location = new Point(10,10);
    // Name the control in order to remove it later. The name must be specified 
    // if a control is added at run time.
    textBox1.Name = "textBox1";

    // Add the control to the form's control collection. 
    this.Controls.Add(textBox1);
}

// Click event handler for a Button control. 
// Removes the previously added TextBox from the form. 
private void removeControl_Click(object sender, System.EventArgs e)
{
    // Loop through all controls in the form's control collection. 
    foreach (Control tempCtrl in this.Controls)
    {
        // Determine whether the control is textBox1, 
        // and if it is, remove it. 
        if (tempCtrl.Name == "textBox1")
        {
            this.Controls.Remove(tempCtrl);
        }
    }
}

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Was this page helpful?
(1500 characters remaining)
Thank you for your feedback
Show:
© 2014 Microsoft