Question: I am dynamically creating dragrids in different rows of an existing datagrid in asp.NET

My generated datagrids have a column which is TemplateColumn (a CheckBox Column).

In my parent datagrid, I have a template column with checkboxes. when I check or uncheck the value of the check box, the check\_change method is called (autopostback is set to true), the dynamically generated datagrids lose the checked checkboxes (the checkboxes are all unchecked again). However, if i check any of the checkboxes of the child (dynamically generated) grids and press F5, it refreshes the page but still I have my checked checkboxes.

What's happening ?? how is post-back different from refresh F5??? understanding this might help me fix my problem here :[DataGrid not being altered!](https://stackoverflow.com/questions/3307878/datagrid-tree-two-levels-dynamically-generated-grids-cannot-be-altered)

Answer: 
It's simple, the browser caches the response. So if you press F5, you'd generally see your grid with the checked checkboxes each time. But if you do a post-back in code, you force the browser to connect to the server and post the data.

It will then wait for a response from the server, and return whatever the reason for the post-back was.

Annoying, but that's how browsers work. You can force a complete refresh than emulates a post-back by hitting Ctrl+F5.

This is (sometimes) browser dependent because not all browsers will act the same as you described here.

If a post-back is necessary but you still want to keep the checkbox status as checked, I'd recommend an AJAX call instead.
A "Refresh" simply calls the last request made for a page. So, if
you just browsed to a page then hit refresh, it simply asks for that page
again.

A Postback is essentially an action on the page that sends
information back to the server.