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Stop Function Executing on Page Refresh

Posted on 2008-10-01
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Last Modified: 2012-05-05
How can I make a function only execute on the first page load and not when a person/user clicks the refresh button?
I have tried the following but it does not work.

I also have hyperlinks in the page which also cause the fuction to execute becuase their navigateURL is the same page (they are used to sort the DB results.)

Thanks
If Not Page.IsPostBack Then
                    loadDBHotels()
else
 findMatch()
 
                End If

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Question by:footballencounters
5 Comments
 
LVL 39

Expert Comment

by:Pratima Pharande
ID: 22613881
Check What you are getting in Response.Write(Request.UrlReferrer.AbsoluteUri) , then in page load

check that if its coming form same page ( Refresh did the same ) then do not excute that function like below


  If (Request.UrlReferrer.AbsoluteUri <> "http://localhost:3160/CMA/WebForm1.aspx") Then
            loadDBHotels()
        End If
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LVL 20

Expert Comment

by:Obadiah Christopher
ID: 22613955
Pass a querystring when u r setting the navigateUrl

Reload = 1 in the navigateurl....


If Request.Querystring("Reload") Is Nothing OrElse Request.Querystring("Reload").ToString().Equals("0") Then
    
    loadDBHotels()
End If

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Author Comment

by:footballencounters
ID: 22614296
informaniac:
Your suggestion works well from links within the page but does not solve the problem of a refresh.

pratima_mcs:
Is there any way of just checking the last part of the URL (i.e. the page name only) rather than the full absolute URL as this becomes a problem when moving the site to different base domains.

Thanks both for your assitance
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LVL 83

Accepted Solution

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CodeCruiser earned 2000 total points
ID: 22614299
Use a session variable. When loaded first time, add this variable to the session and then check for its existence when refreshing. For example

If Not Page.IsPostBack Then
   if not session("DetailsPageLoaded") Then
      loadDBHotels()
   End If
else
 findMatch()
 Session("DetailPageLoaded")=True
End If
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Author Closing Comment

by:footballencounters
ID: 31501936
Thanks - that was the most logical solution.
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