after Postback whether data go to server when it is true ? I am confused with autopostback properties............. please explain .....
A:
A simple google would have told you the answer to this:
Robbed from here as I thought someone else would be able to explain this better than me.
http://www.asp101.com/samples/autopostback_aspx.asp
AutoPostBack is built into the form-based server controls, and when enabled, automatically posts the page back to the server whenever the value of the control in question is changed. Because of the additional server requests it causes, it's not something you'll want to enable for all your controls, but for things that affect page display or change choices further down the form, it can be really handy. Not to mention the fact that it will save you a lot of time and headaches over trying to implement something similar on your own. Not that it's really all that complex to do on your own if you're good with javascript, but it's hard to get any simpler then just setting AutoPostBack="True"
One thing to point out, this will only work when javascript is enabled, in the absense of javascript you will need to provide another mechanism to envoke the postback.
jimplode
2010-09-23 13:42:53
+2
A:
AutoPostBack is the mechanism by which the page will be posted back to the server automatically based on some events in the web controls.
Use it when you want to programmatically react to a change of that control. Perhaps you want to rebind some data in another control.
p.campbell
2010-09-23 13:43:20
+1
A:
AutoPostBack set to true will initiate a page postback (like clicking a button) whenever a server event for the control is fired. Server-side code tied to initiated control events will happen immediately (along with a full/partial page load).
AutoPostBack set to false will NOT initiate this and event code will not fire until another "posting-back" event fires.
Brad
2010-09-23 13:43:55