Hi All,

I have created a grid using ExtJS.
Just an example is shown below,

something my grid looks like this.
while sorting depending upon the column1, Row2,Row4,Row5 are sorted at the end.
But Row2 is a subrow of Row1.similarly Row4 and Row5 are the subrows of Row3(but constructed as separate rows using ExtJs).After sorting also they should come below their respective rows.Since some of the column values are empty the sorting is not happening accordingly.
Can anyone suggest me what should be done.

column1
column2
column3
column4
abc
abc
abc
abc

def
def
def
xyz
xyz
xyz
xyz

pqr
pqr
pqr

stu
stu
stu
mno
mno
mno
mno

Regards
Manjula