How to disable Sorting of Rows in TreeGrid


Can Anybody let me know how to disable sorting of rows on Clicking the header of the Treegrid . Kindly let me know as my first element goes right to the bottom of the grid on clicking the header

Thanks in Advance

You can enable|disable sorting for any column by

for example
will define sorting as
    first column - not available
    second column - as strings
    third column - as numbers
    4th column - not available

How to disable the Sorting for blank grids … I.e if i sort  the blank grids comes right on top and the the grid with values goes to the bottom

This can be caused by sorting rules - empty strings and numbers couted as lesser values, so in case of ASC sorting they coming to top.
You can create custom sorting functionality which will work in any custom way- please check