FindControl not working

**Keith G Hicks** · Jun 27 '08, 08:08 PM

Re: FindControl not working

I should mention that the hyperlink controls are not embeded inside another
control. They are in a content section but they are recognized by
intellisense when I type "me.hyp..." into the vb code page.

"Keith G Hicks" <krh@comcast.ne twrote in message
news:uFenXRSwIH A.1504@TK2MSFTN GP05.phx.gbl...

I'm not sure what I'm doing wrong. Here's my code:
>
Protected Sub Page_Load(ByVal sender As Object, ByVal e As

System.EventArg s)

Handles Me.Load
>
Dim hyp As HyperLink = CType(Me.FindCo ntrol("hypFilt" &
Request.QuerySt ring("Filt")), HyperLink)
If Not hyp Is Nothing Then
hyp.Font.Bold = True
EndIf
>
End If
>
I have several hyperlink controls on a page. Some are ID = hypFiltA,
hypFiltB, hypFiltC, etc. They are used to filter some data by first letter
of the alphabet. The code runs, nothing crashes but but the code above

never

finds them. hyp always = nothing.
>
"hypFilt" & Request.QuerySt ring("Filt") does evaluate out to the correct
value.
>
Thanks,
>
Keith
>
>

**Eliyahu Goldin** · Jun 27 '08, 08:08 PM

Re: FindControl not working

Set a breakpoint and see if the id is formed correctly, run Me.FindControl
in the watch window, see what is inside the Me.Controls collection. This
should help you to figure out what is going on.

--
Eliyahu Goldin,
Software Developer
Microsoft MVP [ASP.NET]

http://msmvps.com/blogs/egoldin

http://usableasp.net

"Keith G Hicks" <krh@comcast.ne twrote in message
news:uFenXRSwIH A.1504@TK2MSFTN GP05.phx.gbl...

I'm not sure what I'm doing wrong. Here's my code:
>
Protected Sub Page_Load(ByVal sender As Object, ByVal e As
System.EventArg s)
Handles Me.Load
>
Dim hyp As HyperLink = CType(Me.FindCo ntrol("hypFilt" &
Request.QuerySt ring("Filt")), HyperLink)
If Not hyp Is Nothing Then
hyp.Font.Bold = True
EndIf
>
End If
>
I have several hyperlink controls on a page. Some are ID = hypFiltA,
hypFiltB, hypFiltC, etc. They are used to filter some data by first letter
of the alphabet. The code runs, nothing crashes but but the code above
never
finds them. hyp always = nothing.
>
"hypFilt" & Request.QuerySt ring("Filt") does evaluate out to the correct
value.
>
Thanks,
>
Keith
>
>

**Keith G Hicks** · Jun 27 '08, 08:08 PM

Re: FindControl not working

It seems that the ID's are fine. When I put me.hypFiltA, or me.hypFiltB, etc
in the watch, they give me a value.
Request.QuerySt ring("Filt") in the watch window returns what I expect: "A"
or "B" or "C" etc.

When I put me.Controls in the watch window, I get a count of 1.

When I put Me.FindControl( "hypFilt" & Request.QuerySt ring("Filt")) in the
watch window, it comes up as Nothing.

If I hard code me.hypFiltA in the same event handler, it works fine. The
control exists and I'm able to set its properties. But I don't want to code
all 26 letters of the alphabet into the event handler.

I tried this in other page events as well (preload, init, initcomplete,
loadcomplete, prerender, prerendercomple te... all with same results.

"Eliyahu Goldin" <REMOVEALLCAPIT ALSeEgGoldDinN@ mMvVpPsS.orgwro te in
message news:eXlvunWwIH A.5472@TK2MSFTN GP06.phx.gbl...

Set a breakpoint and see if the id is formed correctly, run Me.FindControl
in the watch window, see what is inside the Me.Controls collection. This
should help you to figure out what is going on.
>
--
Eliyahu Goldin,
Software Developer
Microsoft MVP [ASP.NET]

http://msmvps.com/blogs/egoldin

http://usableasp.net

>
>
"Keith G Hicks" <krh@comcast.ne twrote in message
news:uFenXRSwIH A.1504@TK2MSFTN GP05.phx.gbl...

I'm not sure what I'm doing wrong. Here's my code:

Protected Sub Page_Load(ByVal sender As Object, ByVal e As
System.EventArg s)
Handles Me.Load

Dim hyp As HyperLink = CType(Me.FindCo ntrol("hypFilt" &
Request.QuerySt ring("Filt")), HyperLink)
If Not hyp Is Nothing Then
hyp.Font.Bold = True
EndIf

End If

I have several hyperlink controls on a page. Some are ID = hypFiltA,
hypFiltB, hypFiltC, etc. They are used to filter some data by first

letter

of the alphabet. The code runs, nothing crashes but but the code above
never
finds them. hyp always = nothing.

"hypFilt" & Request.QuerySt ring("Filt") does evaluate out to the correct
value.

Thanks,

Keith

>
>

**Mark Rae [MVP]** · Jun 27 '08, 08:08 PM

Re: FindControl not working

"Keith G Hicks" <krh@comcast.ne twrote in message
news:u4HbKcYwIH A.4560@TK2MSFTN GP03.phx.gbl...

When I put Me.FindControl( "hypFilt" & Request.QuerySt ring("Filt")) in the
watch window, it comes up as Nothing.

If you put Request.QuerySt ring("Filt") in the watch window, what do you see?

If you put "hypFilt" & Request.QuerySt ring("Filt") in the watch window, what
do you see?

Does Me.FindControl( "hypFilt" & Request.QuerySt ring("Filt").To String())
work?

--
Mark Rae
ASP.NET MVP

Mark Rae - JavaScript Disabled

http://www.markrae.net

**Keith G Hicks** · Jun 27 '08, 08:08 PM

Re: FindControl not working

"Mark Rae [MVP]" <mark@markNOSPA Mrae.netwrote in message
news:Og0NbkYwIH A.2028@TK2MSFTN GP05.phx.gbl...

"Keith G Hicks" <krh@comcast.ne twrote in message
news:u4HbKcYwIH A.4560@TK2MSFTN GP03.phx.gbl...
>

When I put Me.FindControl( "hypFilt" & Request.QuerySt ring("Filt")) in

the

watch window, it comes up as Nothing.

If you put Request.QuerySt ring("Filt") in the watch window, what do you

see?

returns "A"

>
If you put "hypFilt" & Request.QuerySt ring("Filt") in the watch window,

what

do you see?

returns "hypFiltA"

Does Me.FindControl( "hypFilt" & Request.QuerySt ring("Filt").To String())
work?

returns Nothing

>
--
Mark Rae
ASP.NET MVP

Mark Rae - JavaScript Disabled

http://www.markrae.net

>

**Mark Rae [MVP]** · Jun 27 '08, 08:08 PM

Re: FindControl not working

"Keith G Hicks" <krh@comcast.ne twrote in message
news:OlZNHsYwIH A.4916@TK2MSFTN GP03.phx.gbl...

>If you put Request.QuerySt ring("Filt") in the watch window, what do you
>see?

>
returns "A"
>

>If you put "hypFilt" & Request.QuerySt ring("Filt") in the watch window,
>what do you see?

>
returns "hypFiltA"
>

>Does Me.FindControl( "hypFilt" & Request.QuerySt ring("Filt").To String())
>work?

>
returns Nothing

In which case, it sounds very much like the hypFiltA hyperlink isn't
actually in the Page control container. Might it be contained within another
container within the Page container e.g. an <asp:Panel... ?

--
Mark Rae
ASP.NET MVP

Mark Rae - JavaScript Disabled

http://www.markrae.net

**Keith G Hicks** · Jun 27 '08, 08:08 PM

Re: FindControl not working

No. Like I said in my 2nd post, it's all in a content section. It's a master
page setup (asp.net 2.0 if that helps). This is one of the content pages.
Here's the markup (below the @Page and the @Register Assembly lines):

<asp:Content ID="Content1" ContentPlaceHol derID="ContentP laceHolder2"
runat="Server">
<asp:Image ID="Image1" runat="server"
ImageUrl="~/Images/PageTitles_Year bookPics.jpg" /> 
 
Click an image for a larger view. 
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHol derID="ContentP laceHolder1"
runat="Server">
 
Filters (based on last name at
graduation):
<asp:HyperLin k ID="hypFiltAll " runat="server"
NavigateUrl="~/ClassmateYearbo okPics.aspx?Fil t=ALL" Font-Size="11pt">Sho w
All</asp:HyperLink>
<asp:HyperLin k ID="hypFiltA" runat="server"
NavigateUrl="~/ClassmateYearbo okPics.aspx?Fil t=A"
Font-Size="11pt">A</asp:HyperLink>
<asp:HyperLin k ID="hypFiltB" runat="server"
NavigateUrl="~/ClassmateYearbo okPics.aspx?Fil t=B"
Font-Size="11pt">B</asp:HyperLink>

etc.....

"Mark Rae [MVP]" <mark@markNOSPA Mrae.netwrote in message
news:#EQ06wYwIH A.576@TK2MSFTNG P05.phx.gbl...

"Keith G Hicks" <krh@comcast.ne twrote in message
news:OlZNHsYwIH A.4916@TK2MSFTN GP03.phx.gbl...
>

If you put Request.QuerySt ring("Filt") in the watch window, what do you
see?

returns "A"

If you put "hypFilt" & Request.QuerySt ring("Filt") in the watch window,
what do you see?

returns "hypFiltA"

Does Me.FindControl( "hypFilt" & Request.QuerySt ring("Filt").To String())
work?

returns Nothing

>
In which case, it sounds very much like the hypFiltA hyperlink isn't
actually in the Page control container. Might it be contained within

another

container within the Page container e.g. an <asp:Panel... ?
>
>
--
Mark Rae
ASP.NET MVP

Mark Rae - JavaScript Disabled

http://www.markrae.net

>

**Mark Rae [MVP]** · Jun 27 '08, 08:08 PM

Re: FindControl not working

"Keith G Hicks" <krh@comcast.ne twrote in message
news:uQvEA9YwIH A.4376@TK2MSFTN GP06.phx.gbl...

[top-posting corrected]

>In which case, it sounds very much like the hypFiltA hyperlink isn't
>actually in the Page control container. Might it be contained within

another

>container within the Page container e.g. an <asp:Panel... ?

>
No. Like I said in my 2nd post, it's all in a content section. It's a
master
page setup (asp.net 2.0 if that helps). This is one of the content pages.
Here's the markup (below the @Page and the @Register Assembly lines):

OK, just for the sake of clarity, the hyperlinks are all within a content
page, not the MasterPage.

And presumably the code which is trying to refer to those hyperlinks is
similarly behind the content page, not behind the MasterPage...?

--
Mark Rae
ASP.NET MVP

Mark Rae - JavaScript Disabled

http://www.markrae.net

**Keith G Hicks** · Jun 27 '08, 08:08 PM

Re: FindControl not working

"Mark Rae [MVP]" <mark@markNOSPA Mrae.netwrote in message
news:e8J$xEZwIH A.3860@TK2MSFTN GP06.phx.gbl...

"Keith G Hicks" <krh@comcast.ne twrote in message
news:uQvEA9YwIH A.4376@TK2MSFTN GP06.phx.gbl...
>
[top-posting corrected]
>

In which case, it sounds very much like the hypFiltA hyperlink isn't
actually in the Page control container. Might it be contained within

another

container within the Page container e.g. an <asp:Panel... ?

No. Like I said in my 2nd post, it's all in a content section. It's a
master
page setup (asp.net 2.0 if that helps). This is one of the content

pages.

Here's the markup (below the @Page and the @Register Assembly lines):

>
OK, just for the sake of clarity, the hyperlinks are all within a content
page, not the MasterPage.

That's correct.

And presumably the code which is trying to refer to those hyperlinks is
similarly behind the content page, not behind the MasterPage...?

That's correct also.

>
--
Mark Rae
ASP.NET MVP

Mark Rae - JavaScript Disabled

http://www.markrae.net

>

**George Ter-Saakov** · Jun 27 '08, 08:08 PM

Re: FindControl not working

I am sorry to jump in, but do your hyperlinks have runat=server atribute??
Find control will only work with .NET object.

George.

"Keith G Hicks" <krh@comcast.ne twrote in message
news:OzXlf8awIH A.1236@TK2MSFTN GP02.phx.gbl...

"Mark Rae [MVP]" <mark@markNOSPA Mrae.netwrote in message
news:e8J$xEZwIH A.3860@TK2MSFTN GP06.phx.gbl...

>"Keith G Hicks" <krh@comcast.ne twrote in message
>news:uQvEA9YwI HA.4376@TK2MSFT NGP06.phx.gbl.. .
>>
>[top-posting corrected]
>>

>In which case, it sounds very much like the hypFiltA hyperlink isn't
>actually in the Page control container. Might it be contained within
another
>container within the Page container e.g. an <asp:Panel... ?
>
No. Like I said in my 2nd post, it's all in a content section. It's a
master
page setup (asp.net 2.0 if that helps). This is one of the content

pages.

Here's the markup (below the @Page and the @Register Assembly lines):

>>
>OK, just for the sake of clarity, the hyperlinks are all within a content
>page, not the MasterPage.

>
That's correct.
>
>

>And presumably the code which is trying to refer to those hyperlinks is
>similarly behind the content page, not behind the MasterPage...?

>
That's correct also.
>

>>
>--
>Mark Rae
>ASP.NET MVP
>http://www.markrae.net
>>

>
>

**Keith G Hicks** · Jun 27 '08, 08:08 PM

Re: FindControl not working

Yes. It's in the code I posted a couple of posts up.

"George Ter-Saakov" <gt-nsp@cardone.com wrote in message
news:uw2XYJbwIH A.4876@TK2MSFTN GP02.phx.gbl...

I am sorry to jump in, but do your hyperlinks have runat=server atribute??
Find control will only work with .NET object.
>
George.
>

**George Ter-Saakov** · Jun 27 '08, 08:08 PM

Re: FindControl not working

Sorry did not see your message...
I've never had a problem with FindControl not working as it suppose to...
So here is my take...

you have a following code which appears to be fine.

Dim hyp As HyperLink = CType(Me.FindCo ntrol("hypFilt" &
Request.QuerySt ring("Filt")), HyperLink)
If Not hyp Is Nothing Then
hyp.Font.Bold = True
EndIf

Following options.

0. All you do is set Bold to font. Not sure how Hyperlink control works with
it. The style for <Atag might take over and overwrite the BOLD thing.
Cause it might product folowing html code <A>B</A></Bthen style for A
tag will take over the <Btag.
So do something else.

1. Code never executes.... Easy to test in debugger or just add
Response.Write( "AAA") right before you do FindCotrol

My bet would be on #0 then #1.

George.

"Keith G Hicks" <krh@comcast.ne twrote in message
news:uVklaabwIH A.4376@TK2MSFTN GP06.phx.gbl...

Yes. It's in the code I posted a couple of posts up.
>
"George Ter-Saakov" <gt-nsp@cardone.com wrote in message
news:uw2XYJbwIH A.4876@TK2MSFTN GP02.phx.gbl...

>I am sorry to jump in, but do your hyperlinks have runat=server
>atribute??
>Find control will only work with .NET object.
>>
>George.
>>

>
>

**Mark Rae [MVP]** · Jun 27 '08, 08:08 PM

Re: FindControl not working

"Keith G Hicks" <krh@comcast.ne twrote in message
news:OzXlf8awIH A.1236@TK2MSFTN GP02.phx.gbl...

>And presumably the code which is trying to refer to those hyperlinks is
>similarly behind the content page, not behind the MasterPage...?

>
That's correct also.

Hmm - OK. I'm starting to run out of options now...

If the code which is trying to reference the hyperlink is definitely behind
the same page where the hyperlink is defined, and the hyperlink is not
contained within a separate container, then FindControl should definitely
find it.

So, can you please try the following:

In the watch window, evaluate Me.Controls.Cou nt and then inspect each of
them e.g.

Me.Controls[0]
Me.Controls[1]

etc

Is hypFiltA one of them...?

--
Mark Rae
ASP.NET MVP

Mark Rae - JavaScript Disabled

http://www.markrae.net

**Keith G Hicks** · Jun 27 '08, 08:08 PM

Re: FindControl not working

There is only one control. Me.Controls.Cou nt = 1. Me.Control(0) =
{ASP.masterpage _master}. Interesting.

So here's the answer. Ready?

Dim hyp As HyperLink =
CType(Me.Master .FindControl("C ontentPlaceHold er1").FindContr ol("hypFilt" &
Request.QuerySt ring("Filt")), HyperLink)

This page helped a lot:

ASP.NET 2.0 MasterPages and FindControl()

http://www.west-wind.com/WebLog/posts/5127.aspx

Using MasterPages in your layout changes the control hierarchy of your page considerably which can break some existing code that relies on dynamically locating controls on the page with FindControl().

Apparently master pages really screw things up in this regard.

Thanks everyone for all your help.

Keith

FindControl not working

FindControl not working

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