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dhtmlXTree drag-and-drop

I know how to load the tree using tree.loadXML("mytree.xml"). How do I load the tree if I don't have an xml file - either I am gathering/generating the tree information or it's being forwarded to me (from another page)?

loadXML requires only XML stream with data from server ( it can be generated by any server side script ).

So, you can use following:

    tree.loadXML(somescript);

Also tree provides other ways of adding data:

1) loading from xml string

    tree.loadXMLString(xml_string)

2) loading from json object or file, please see sample - http://www.dhtmlx.com/docs/products/dhtmlxTree/samples/json_support/pro_load_json.html

3) using insertNewItem and insertNewChild methods to add nodes one by one. Here is the sample -  http://www.dhtmlx.com/docs/products/dhtmlxTree/samples/loading_processing_data/pro_add_item.html