Flex:树组件:在数据提供者更新时保持状态 [英] Flex: Tree component: keeping state when data provider updates

问题描述

我将如何保持树控件的状态?我想在数据提供者更新时保持树的状态，而不是崩溃.

解决方案

这样的事情怎么样 :

<前>var openItems:Object = tree.openItems;tree.dataProvider = myNewDataProvider;tree.openItems = openItems;树.validateNow();

如果新的 dataProvider 与旧的完全不同，我不确定这将如何工作，但是当您延迟加载树节点时它会工作.

How would I go about keeping the state of a tree control? I'd like to keep the state of the tree when it's data provider gets updated, instead of it collapsing.

解决方案

How about something like this :

    var openItems:Object = tree.openItems;
    tree.dataProvider = myNewDataProvider;
    tree.openItems = openItems;
    tree.validateNow();

I'm not sure how well this will work if the new dataProvider is radically different from the old one, but it works when you're lazy loading tree nodes.

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