fix a time and date to fill and edit the gridview and save ?

Question

Hi

 

I am having saved data's in SQL table,while i bound dat in gridview its showing.now i want to edit it and having a column name as date,so with respect to dat ,

already saved data's for future date records oly can able to edit ...

how to fix date limit to fill ..

 

ex:

 

i having a form.

In that am  selecting date is : 15.05.2016

i filled all data's before itself (i.e) today(13.05.2016) .

now i wanna to edit the details which i submitted before..

with respect to 15th i can able to edit until tmrw only..

on 15 i cant able to edit that data which i was submitted on  (13 th day ) itself...

 

how to fix the condition to edit and fill in the gridview with respect to the date? 

 

please anyone help me...