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Having to click button twice

Posted on 2007-03-21
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Last Modified: 2008-03-17
why do I have to click my Accept button twice to get to fire off the Javascript function?  Do I need a check on Postback here?

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        panAgreement.Visible = True

        sb.Append(vbCrLf)
        sb.Append("<script language='javascript' type='text/javascript'>" & vbCrLf)
        sb.Append("<!--" & vbCrLf)
        sb.Append("function closePopUp()" & vbCrLf)
        sb.Append("{" & vbCrLf)
        sb.Append(" window.opener.location.reload();")
        sb.Append(" self.close();")
        sb.Append("}" & vbCrLf)
        sb.Append("//-->" & vbCrLf)
        sb.Append("</script>")
        sb.Append(vbCrLf)
        Page.RegisterStartupScript("closePopUp", sb.ToString)
        btnAccept.Attributes.Add("onclick", "closePopUp()")
    End Sub

    Protected Sub btnAccept_Click(ByVal sender As Object, ByVal e As EventArgs)
        vcUser.UpdateEBookPolicyDate()
        Dim sb As System.Text.StringBuilder = New System.Text.StringBuilder("")

    End Sub
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Question by:dba123
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9 Comments
 
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Expert Comment

by:jef06
ID: 18769629
The code can go multiple time in Page_load
you might want to add
If page.IsPostBack = false Then
   btnAccept.Attributes.Add("onclick", "closePopUp()")
Also to not add multiple time the script closeopopup you can check if it is present
if Page.isRegisterStartupScript("closePopUp") = False Then
      Page.RegisterStartupScript("closePopUp", sb.ToString)
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Author Comment

by:dba123
ID: 18772870
hmm, thanks!!!
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Author Comment

by:dba123
ID: 18772947
nope, putting that in didn't help....
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Author Comment

by:dba123
ID: 18772955
also I noticed that Intellisense is not picking this up

isRegisterStartupScript

but is picking up everything else fine such as the egisterStartupScript
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Author Comment

by:dba123
ID: 18773022
I debugged it, but don't see what the problem is.  Your check for the postback is correct.  When I click the button, it definitely is calling Page.RegisterStartupScript("closePopUp", sb.ToString) the first click but nothing happens.
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Author Comment

by:dba123
ID: 18773141
It has something to do with the page lifecycle...probably the register isn't happening the first time through...
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Accepted Solution

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dba123 earned 0 total points
ID: 18781658
Ok, figured it out...it was the order of what was happening.

I ended up putting the stringbuilder in the page load but then the call to that function in my button click event and then got rid of the btnAccept.Attributes.Add("onclick", "closePopUp()")
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