Answer / alb.shah

Callback : It is a way to send a request to the web page
from the client script. Postback is an expensive call with
processing overhead. In callback a client function sends a
request and a special marked method is invoked on the
server. It does the processing & returns the value which is
received by another client function to process the result.
To have client side callbacks, the page has to implement
ICallbackEventHandler & implement functions
RaiseCallBackEvent & GetCallBackResult.

PostBack: Postback is the event which sends the form data to
the server. The server processes the data & sends it back to
the browser. The page goes through its full life cycle & is
rendered on the browser. It can be triggered by using the
server controls.

Callback is also the form of Postback, but the difference
is in postback execute a complete page life cycle and whole
page redraw, in callback only specific portion (Contorl) is
executed/redraw using client side scriptiong.

what is differences between bind and eval?

2 Answers  

---

When during the page processing cycle is ViewState available?

1 Answers  

---

which directive is mandatory in page control

3 Answers   AG Technologies,

---

What is preprocessor in .net?

0 Answers  

---

what is the difference between console.writeline &console.output.writeline?

2 Answers  

---

Is web config mandatory?

0 Answers  

---

What is rich control in asp.net?

0 Answers  

---

How do you do client-side validation in .net? How to disable validator control by client side javascript?

0 Answers  

---

Is There any Third party tools are using in .Net Technologies? Can u Explain?

4 Answers   HCL,

---

What is asp.net introduction?

0 Answers  

---

Should sn.exe be used before gacutil.exe ?

2 Answers   Accenture, BirlaSoft,

---

What can we do with asp.net?

0 Answers  

---