how does the following code work?

Question

0.00/5 (No votes)

See more:

suppose my page is ex.aspx
in the aspx.cs file how will the following code work??

if(!exPostback)
{
do something
}

does the control enter the loop if the page is loaded on browser for the first time or again and again????

and what does this mean??
return (ViewState["exPostback"] != null);

thanks in advance!!!!

Posted 10-Mar-14 23:35pm

Member 10604424

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Answer 1 · 2014-03-10T23:56:00

You need to look at the page event lifecycle: http://msdn.microsoft.com/en-us/library/ms178472.aspx[^] - the Load event for teh page is called every time you past back, becuas eteh server does not maintin the page status after the HMTL has been sent to teh client: it is thrown away.

So, when you press a button on the page, a postback occurs, the page is loaded, the Load event occurs and then the button Click event.
In you Load event, you can use Page.IsPostBack to check if this is the first time, or in response to an action at the client end - so you don't overwrite what the user typed when he clicked the button! I'm guessing that your code is typed wrong in the example above...

MAYANK GEETE · Answer 2 · 2014-03-11T01:25:00

Solution 2

Is Postback is normally used on page _load event to detect if the page is getting generated due to postback requested by a control on the page or if the page is getting loaded for the first time.

Posted 11-Mar-14 1:25am

MAYANK GEETE