UIElement.DragStarting 事件

定义

命名空间:

Windows.UI.Xaml

在启动拖动操作时发生。

// Register
event_token DragStarting(TypedEventHandler<UIElement, DragStartingEventArgs const&> const& handler) const;

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

// Revoke with event_revoker
UIElement::DragStarting_revoker DragStarting(auto_revoke_t, TypedEventHandler<UIElement, DragStartingEventArgs const&> const& handler) const;

public event TypedEventHandler<UIElement,DragStartingEventArgs> DragStarting;

function onDragStarting(eventArgs) { /* Your code */ }
uIElement.addEventListener("dragstarting", onDragStarting);
uIElement.removeEventListener("dragstarting", onDragStarting);
- or -
uIElement.ondragstarting = onDragStarting;

Public Custom Event DragStarting As TypedEventHandler(Of UIElement, DragStartingEventArgs) 

<uiElement DragStarting="eventhandler"/>

事件类型

TypedEventHandler<UIElement,DragStartingEventArgs>

注解

DragStarting 是路由事件。 有关路由事件概念的详细信息，请参阅 事件和路由事件概述。

另请参阅

• DragStartingEventArgs
• 拖放示例 (Windows 10)