ComboBox.DropDownOpened 事件

  • 参考

定义

命名空间:
Microsoft.UI.Xaml.Controls
编辑

在 ComboBox 的下拉部分打开时发生。

// 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"/>

事件类型

EventHandler<Object>

EventHandler<Object>

EventHandler<IInspectable>

适用于