c# - How to set text color of aspx tree node in run time -

i want write on c# side:

protected void eventhandler(object sender, devexpress.web.somethingtreeviewevent e){    //figure out color mapping, may depend on date , time, whatever.    foreach (node in in mytree)      node.textcolor = colormapping(mappingfunc(node)); } 

question is, method setting color? there treeviewnodetextstyle, is read only, , it's constructor takes no arguments.