次の方法で共有

TreeView.Expanding イベント

  • リファレンス

定義

名前空間:
Microsoft.UI.Xaml.Controls
編集

ツリー内のノードが展開を開始したときに発生します。

// Register
event_token Expanding(TypedEventHandler<TreeView, TreeViewExpandingEventArgs const&> const& handler) const;

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

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

イベントの種類

TypedEventHandler<TreeView,TreeViewExpandingEventArgs>

適用対象