Avoid the Page_Load after clicking dropdownlist

•

What is DaniWeb IT Discussion Community?

You're currently browsing the ASP.NET section within the Web Development category of DaniWeb, a massive community of 402,974 software developers, web developers, Internet marketers, and tech gurus who are all enthusiastic about making contacts, networking, and learning from each other. In fact, there are 2,722 IT professionals currently interacting right now! Registration is free, only takes a minute and lets you enjoy all of the interactive features of the site.

Join our community!

Please support our ASP.NET advertiser: Lunarpages ASP Web Hosting

Thread Tools Display Modes

Views: 299 | Replies: 2

•

Join Date: May 2008

Posts: 47

Reputation: pranav_jog is an unknown quantity at this point

Rep Power: 1

Solved Threads: 0

pranav_jog pranav_jog is offline

Offline

Light Poster

Avoid the Page_Load after clicking dropdownlist

Jul 8th, 2008

I have a user control dropdownlist, and its intended that when a user selects any item from dropdownlist , then accordingly image is displayed on the same form.

My problem is, when i select once from dropdownlist then , the page is going through the page_load and after clicking again the second time, it again walks through page_load and diretly displayes image

My question is, is it possible to avoid the page_load in any way ? & to load when i select the item first time from the dropdownlist ??

please help me to resolve this...

•

Join Date: Jan 2008

Location: istanbul

Posts: 265

Reputation: serkansendur is an unknown quantity at this point

Rep Power: 1

Solved Threads: 23

serkansendur serkansendur is offline

Offline

Posting Whiz in Training

Re: Avoid the Page_Load after clicking dropdownlist

Jul 8th, 2008

wrap your code in the page load event handler with the following:
if(!IsPostBack)
{
//your code
}

Serkan Şendur
MCAD.NET

•

Join Date: Jul 2007

Location: Surathkal

Posts: 106

Reputation: tuse is an unknown quantity at this point

Rep Power: 2

Solved Threads: 10

tuse

Offline

Junior Poster

Re: Avoid the Page_Load after clicking dropdownlist

Jul 8th, 2008

If you want the code inside the Page_load to execute just the first time the page loads and prevent it from executing subsequently, put this part of code inside an if not IsPostBack block

 Help with Code Tags 
 asp.net Syntax (Toggle Plain Text) 
 Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
 
 If Not IsPostBack Then
 
' Code here that needs to be executed only on first page_load
 
End If
End Sub
 
 Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

 If Not IsPostBack Then

' Code here that needs to be executed only on first page_load

End If
End Sub

IsPostBack is a Boolean property of a page when is set (=true) when a page is first loaded. Thus, the first time that the page loads the IsPostBack is false and for subsequent PostBacks, it is true.

Read more here: http://dotnet.tekyt.info/?p=30

My blog on .NET- http://dotnet.tekyt.info