Expander.Expanding 事件

  • 参考

定义

命名空间:
Microsoft.UI.Xaml.Controls
编辑

当 展开器 的内容区域开始显示时发生。

// Register
event_token Expanding(TypedEventHandler<Expander, ExpanderExpandingEventArgs const&> const& handler) const;

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

// Revoke with event_revoker
Expander::Expanding_revoker Expanding(auto_revoke_t, TypedEventHandler<Expander, ExpanderExpandingEventArgs const&> const& handler) const;
public event TypedEventHandler<Expander,ExpanderExpandingEventArgs> Expanding;
function onExpanding(eventArgs) { /* Your code */ }
expander.addEventListener("expanding", onExpanding);
expander.removeEventListener("expanding", onExpanding);
- or -
expander.onexpanding = onExpanding;
Public Custom Event Expanding As TypedEventHandler(Of Expander, ExpanderExpandingEventArgs)

事件类型

TypedEventHandler<Expander,ExpanderExpandingEventArgs>

适用于