ComboBox.DropDownOpened Event

Definition

Namespace:

System.Windows.Controls

Assembly:

PresentationFramework.dll

Occurs when the drop-down list of the combo box opens.

C#

public event EventHandler DropDownOpened;

Event Type

EventHandler

Examples

The following example shows how to assign event handlers and handle the DropDownOpened and DropDownClosed events.

XAML

<ComboBox Name="cb" StaysOpenOnEdit="true" IsEditable="true" DropDownOpened="OnDropDownOpened" 
        DropDownClosed="OnDropDownClosed">

C#

void OnDropDownOpened(object sender, EventArgs e)
{
    if (cb.IsDropDownOpen)
    {
        cb.Text = "Combo box opened";
    }
}

void OnDropDownClosed(object sender, EventArgs e)
{
    if (!cb.IsDropDownOpen)
    {
        cb.Text = "Combo box closed";
    }
}

Applies to