javascript - 如何动态更新道场树数据

Question

我想知道如何动态更新 dojo.dijit.tree 组件的数据。目前我正在使用 dojo.data.ItemFileReadStore 和 dijit.tree.ForestStoreModel 创建树。创建树后，我想使用新的 JSON 数据定期重新加载它。

这就是我现在创建树的方式:

<div dojoType="dojo.data.ItemFileReadStore" jsId="myStore" url=getJSONResult></div>

<div dojoType="dijit.tree.ForestStoreModel" jsId="myModel" store="myStore" query="{type:'cat'}" rootId="myRoot" rootLabel="Data" childrenAttrs="children"></div>

<div dojoType="dijit.Tree" model="myModel" labelAttr="sname" label="Data" />

提前致谢。

Answer 1

明确地说你“不能”，但这并不意味着你不能把事情搞砸然后死于尝试。

refreshTree : function(){
    dijit.byId("myTree").dndController.selectNone(); // As per the answer below     
    // Credit to this discussion: http://mail.dojotoolkit.org/pipermail/dojo-interest/2010-April/045180.html
    // Close the store (So that the store will do a new fetch()).
    dijit.byId("myTree").model.store.clearOnClose = true;
    dijit.byId("myTree").model.store.close();

    // Completely delete every node from the dijit.Tree     
    dijit.byId("myTree")._itemNodesMap = {};
    dijit.byId("myTree").rootNode.state = "UNCHECKED";
    dijit.byId("myTree").model.root.children = null;

    // Destroy the widget
    dijit.byId("myTree").rootNode.destroyRecursive();

    // Recreate the model, (with the model again)
    dijit.byId("myTree").model.constructor(dijit.byId("myTree").model)

    // Rebuild the tree
    dijit.byId("myTree").postMixInProperties();
    dijit.byId("myTree")._load();

},

这将刷新您的树。