Problems with ASP.Net 2.0 and JavaScript

richard · Jul 27, 2006

OK,

Im working with a DataList in .Net 2.0, the code shows the list when
the query has executed. I have the page feature in its own div and
display:none so its not visible until the list shows. Ive written
javascript in ASP.Net to show the DIV. The code is as follows:

jScript = "<script LANGUAGE=""javascript"">" & vbNewLine
jScript = jScript & "function ToggleDiv(id){" & vbNewLine
jScript = jScript & "var elem = document.getElementById(id);" &
vbNewLine
jScript = jScript & "if (elem)" & vbNewLine
jScript = jScript & "{" & vbNewLine
jScript = jScript & " if (elem.style.display != 'block')" &
vbNewLine
jScript = jScript & " {" & vbNewLine
jScript = jScript & " elem.style.display = 'block';"
&vbNewLine
jScript = jScript & " elem.style.visibility = 'visible';"
& vbNewLine
jScript = jScript & " }" & vbNewLine
jScript = jScript & " else" & vbNewLine
jScript = jScript & " {" & vbNewLine
jScript = jScript & " elem.style.display =
'none';" & vbNewLine
jScript = jScript & " elem.style.visibility =
'hidden';" & vbNewLine
jScript = jScript & " }" & vbNewLine
jScript = jScript & " }" & vbNewLine
jScript = jScript & "}" & vbNewLine
jScript = jScript & "ToggleDiv('Page_Div');" & vbNewLine
jScript = jScript & "</sc" & "ript>"

Response.Write(jScript)

I dont get any errors, but the javascript doesn't execute either.
Anyone have any ideas?

Mark Rae · Jul 27, 2006

I dont get any errors, but the javascript doesn't execute either.
Anyone have any ideas?

I'm not a VB.NET specialist, but what happens if you replace vbNewLine with
"\n"

sloan · Jul 27, 2006

I think you gotta register it with the page (or are you not showing that
part?)

here is a sample I had ... written in vb.net

its actually a part of a class, where the constructor has the Page ... so I
can reuse it.

that's what _currentPage is all about.

I'd get a basic thing working first.. ( just an alert or something?) before
dealing with the hidden div stuff.

Private Sub CreateTrimJS()

Dim sb As StringBuilder = New StringBuilder

sb.Append("' + str);" &
vbCrLf)

sb.Append("var returnVal='';" & vbCrLf)

sb.Append("returnVal=str.replace(/^\s*|\s*$/g,"""");" &
vbCrLf)

''debug
''sb.Append("alert('str -->*' + str + '*\nreturnVal--> *' +
returnVal + '*');" & vbCrLf)

sb.Append("return returnVal;" & vbCrLf)

''close the entire function
sb.Append("}" & vbCrLf)
sb.Append(vbCrLf & "// -->" & vbCrLf)

If (Not
_currentPage.IsStartupScriptRegistered("someuniquevalueHere")) Then
'prevents a "double register"

_currentPage.RegisterStartupScript("someuniquevalueHere", sb.ToString)
End If

End Sub

cannontrodder · Jul 27, 2006

This works fine for me. However, It DOESN'T work if your div is AFTER
this block, it doesn't exist in the dom when you call the function with
the line:

ToggleDiv('Page_Div');

If your div is before this block, it works fine.

I advise putting the whole function in a .js file and including it into
your web page in a <script> tag between the <head> .. </head> section.
That will make it easier to read/debug. I'd then put the
"ToggleDiv('Page_Div');" call in the onload event of the <body> tag.
That way, no matter where the DIV exists, IE will only call your toggle
function once the entire page is loaded into the DOM.

Add recipes using JavaScript in table	20	Apr 17, 2023
progress indicator long running proc NO Button click	16	Jun 30, 2009
Ajax on .NET 2.0	3	Nov 13, 2008
Prevent copy of hidden elements	2	May 7, 2008
ASP.NET and Javascript	1	Aug 13, 2003
Only one table shows up with the information	2	Mar 29, 2023
Help with code	0	Jun 12, 2022
Help with Visual Lightbox: Scripts	2	May 3, 2023

Problems with ASP.Net 2.0 and JavaScript

richard

Mark Rae

sloan

cannontrodder

Ask a Question

Similar Threads

Members online

Forum statistics

Latest Threads