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dhtmlXTreeGrid refreshItem method

How can I refresh dhtmlXTreeGrid data from xml service without component flicker, rows collapsing, and loosing scrollbar position. I thing dhtmlXTree has an method that does just that: refreshItem(0)

thanks.

Unfortunately there is no way to update item in the treeGrid with saving collapsing state and scroll bar position. The only way to update values in treeGrid is to use setValue() method:
treeGrid.cells(rowId,cellIndex).setValue("newValue")