P.S. binspaul, datastore.close() function is not yet available, need to wait till dojo 1.2 for that.

console.info(”Tree store (before) : “);
console.info(_this.tree.store);

// Create a new store.
newStore = new dojo.data.ItemFileWriteStore({url: ‘folders.html?hidValAction=getjsondata’, jsId: “newFolderStore”});
newStore.fetch();
_this.tree.store = newStore;

console.info(”Tree store (after) : “);
console.info(_this.tree.store);

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The output obtained is :

Tree store (before) :
Object _arrayOfAllItems=[18] _arrayOfTopLevelItems=[18]

GET ………/folders.html?hidValAction=getjsondata

Tree store (after) :
Object _arrayOfAllItems=[0] _arrayOfTopLevelItems=[0]

Best regards,
Binu Paul

METHOD 1 :

var _this = this;
newStore = new dojo.data.ItemFileWriteStore({url: ‘test.html?hidValAction=getjsondata’, jsId: “datStore”});
newStore.fetch();
_this.tree.model.store.close();
_this.tree.store = newStore;

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

METHOD 2 :

var _this = this;

_this.tree.model.store = new dojo.data.ItemFileWriteStore({url: _this.tree.model.store.url});

_this.tree.model.store.fetch();

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The store is getting populated. But it is not getting reflected in the tree.

Best regards,
Binu Paul

var new_store = new dojo.data.ItemFileReadStore({url: ‘poptarts.txt’});
new_store.fetch();

var myTree = dijit.byId(”tree”);

myTree.store = new_store;

dojo.forEach(myTree._openedItemIds, function (item) {
n = myTree._itemNodeMap(item);
n.state = “UNCHECKED”
n.isExpanded = false;
n.expand();
});

foreach myTree.getExpanededNodes as n
   n.state = "UNCHECKED"
   n.isExpanded = false
   n.expand()

and

dojo.forEach(myTree._openedItemIds, function (item) {
   n = myTree._itemNodeMap(item);
   n.state = "UNCHECKED"
   n.isExpanded = false;
   n.expand();
});


foreach myTree.getExpanededNodes as n
n.state = "UNCHECKED"
n.isExpanded = false
n.expand()


Basically for each node in the tree that is already expanded, set its state to UNCHECKED and call the code to re-expand the nodes. By having the state as UNCHECKED it will hit the updated data store instead of in-memory cache.

You can try this, but it only works if persist=true is set on your tree:


dojo.forEach(myTree._openedItemIds, function (item) {
n = myTree._itemNodeMap(item);
n.state = "UNCHECKED"
n.isExpanded = false;
n.expand();
});


Note - the above is untested. persist=true is needed because it is the only way that myTree._openedItemIds is maintained. I’m checking with the dev’s to see if there’s a better way.

Hope that helps,

Josh