WPF框架对象的生命周期

最新推荐文章于 2025-04-30 13:59:32 发布

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本文探讨了WPF框架级别元素（从FrameworkElement或FrameworkContentElement派生的对象）的生命周期。初始化(Initialized)事件在元素树（包括视觉树和逻辑树）中的顺序不确定，而加载(Loaded)事件则遵循从父到子的顺序依次触发。

所谓框架对象--WPF framework-level element (those objects deriving from either FrameworkElement or FrameworkContentElement)

的生命周期见这里

值得注意的是Initialized事件的顺序在树（包括视觉树和逻辑树）的顺序是不确定的。而loaded事件居然是从父到子的。

The mechanism by which the Loaded event is raised is different than Initialized. The Initialized event is raised element by element, without a direct coordination by a completed element tree. By contrast, the Loaded event is raised as a coordinated effort throughout the entire element tree (specifically, the logical tree). When all elements in the tree are in a state where they are considered loaded, the Loaded event is first raised on the root element. The Loaded event is then raised successively on each child element.