Avoid sort the first colum in my Treegrid

I have a Treegrid with 3 columns (Data, Price and Amount), the method sort works when I click the header column, but I want avoid sorting the first column and only apply the sorting on the next columns.


The behavior that I want is this:

dhtmlx.com/docs/products/dhtmlxT … ndex.shtml

Unfortunately your issue is not clear.
Please, try to use “na” to deny sorting a column. or use “str/int/date” for a needed type of the sorting of the column.