c# - How to modify existing column value on a DataBound in GridView using if else -

i use data source populate grid view. need able se every column value equals 01/01/00 nothing.

here code , image of values:
the gridview no border lines.
doing wrong?

first of all: not paste code in image.

secondly, equals method supposed check whether value equal 1 pass in parameter. intstead of that, use row.cells[9] = "";