ComboBox.DropDownOpened 事件

定義

命名空間:

Windows.UI.Xaml.Controls

發生于 ComboBox 的下拉式部分開啟時。

// Register
event_token DropDownOpened(EventHandler<IInspectable> const& handler) const;

// Revoke with event_token
void DropDownOpened(event_token const* cookie) const;

// Revoke with event_revoker
ComboBox::DropDownOpened_revoker DropDownOpened(auto_revoke_t, EventHandler<IInspectable> const& handler) const;

public event System.EventHandler<object> DropDownOpened;

function onDropDownOpened(eventArgs) { /* Your code */ }
comboBox.addEventListener("dropdownopened", onDropDownOpened);
comboBox.removeEventListener("dropdownopened", onDropDownOpened);
- or -
comboBox.ondropdownopened = onDropDownOpened;

Public Custom Event DropDownOpened As EventHandler(Of Object) 

<ComboBox DropDownOpened="eventhandler"/>

事件類型

EventHandler<Object>

EventHandler<Object>

EventHandler<IInspectable>