screen resolution

DavidS

Have resW=screen.wid th; resH=screen.hei ght in javascript. How can I read
these values in ASP.NET source code - Page_Load function of code behind?

Any suggestions?

Nov 19 '05 #1

Subscribe Reply

11647

Eliyahu Goldin

You need to pass the values from client to server side. The standard way is
to use hidden input controls:

<input type=hidden runat=server id=inhResW>

Eliyahu

"DavidS" <Da****@discuss ions.microsoft. com> wrote in message
news:BC******** *************** ***********@mic rosoft.com...

Have resW=screen.wid th; resH=screen.hei ght in javascript. How can I read
these values in ASP.NET source code - Page_Load function of code behind?

Any suggestions?

Nov 19 '05 #2

DavidS

I've have the following in HTML code...
<script language="javas cript">
document.getEle mentById('resW' ) = window.screen.w idth;
document.getEle mentById('resH' ) = window.screen.h eight;
</script>
<input type=hidden name=resW id=resW runat=server>
<input type=hidden name=resH id=resH runat=server>

How can I access the values in ASP.NET (VB) code behind? I keep getting
null values when I use Request.Form("r esW") or resW.Value?

What am I missing?

"Eliyahu Goldin" wrote:

You need to pass the values from client to server side. The standard way is
to use hidden input controls:

<input type=hidden runat=server id=inhResW>

Eliyahu

"DavidS" <Da****@discuss ions.microsoft. com> wrote in message
news:BC******** *************** ***********@mic rosoft.com...
Have resW=screen.wid th; resH=screen.hei ght in javascript. How can I read
these values in ASP.NET source code - Page_Load function of code behind?

Any suggestions?

Nov 19 '05 #3

S. Justin Gengo

David,

I can think of two things that may be happening.

The first is that there won't be any value in either of those fields until a
postback has occurred. The first time your code runs the page hasn't
displayed on the client and the javascript hasn't filled those fields.

The second (if the problem isn't the first) is that setting the controls as
runat="Server" may be interfering with the process. If you're going to use
Request.Form to get the values the controls don't have to be .Net controls.
You would only use runat="Server" if you want to reference the hidden inputs
as .Net server side controls. To do that you should declare them on your
page something like:

Protected WithEvents resW As System.Web.Html Controls.HtmlGe nericControl

(I typed that from memory, so double check the system declaration...)

But from the looks of things I would just remove the runat="Server" and then
do the Request.Form on postback only.

--
Sincerely,

S. Justin Gengo, MCP
Web Developer / Programmer

www.aboutfortunate.com

"Out of chaos comes order."
Nietzsche
"DavidS" <Da****@discuss ions.microsoft. com> wrote in message
news:9C******** *************** ***********@mic rosoft.com...

I've have the following in HTML code...
<script language="javas cript">
document.getEle mentById('resW' ) = window.screen.w idth;
document.getEle mentById('resH' ) = window.screen.h eight;
</script>
<input type=hidden name=resW id=resW runat=server>
<input type=hidden name=resH id=resH runat=server>

How can I access the values in ASP.NET (VB) code behind? I keep getting
null values when I use Request.Form("r esW") or resW.Value?

What am I missing?

"Eliyahu Goldin" wrote:
You need to pass the values from client to server side. The standard way
is
to use hidden input controls:

<input type=hidden runat=server id=inhResW>

Eliyahu

"DavidS" <Da****@discuss ions.microsoft. com> wrote in message
news:BC******** *************** ***********@mic rosoft.com...
> Have resW=screen.wid th; resH=screen.hei ght in javascript. How can I
> read
> these values in ASP.NET source code - Page_Load function of code
> behind?
>
> Any suggestions?

Nov 19 '05 #4

Eliyahu Goldin

Change to:

document.getEle mentById('resW' ).value = window.screen.w idth;
document.getEle mentById('resH' ).value = window.screen.h eight;

and use resW.Value.

Eliyahu

"DavidS" <Da****@discuss ions.microsoft. com> wrote in message
news:9C******** *************** ***********@mic rosoft.com...

I've have the following in HTML code...
<script language="javas cript">
document.getEle mentById('resW' ) = window.screen.w idth;
document.getEle mentById('resH' ) = window.screen.h eight;
</script>
<input type=hidden name=resW id=resW runat=server>
<input type=hidden name=resH id=resH runat=server>

How can I access the values in ASP.NET (VB) code behind? I keep getting
null values when I use Request.Form("r esW") or resW.Value?

What am I missing?

"Eliyahu Goldin" wrote:
You need to pass the values from client to server side. The standard way is to use hidden input controls:

<input type=hidden runat=server id=inhResW>

Eliyahu

"DavidS" <Da****@discuss ions.microsoft. com> wrote in message
news:BC******** *************** ***********@mic rosoft.com...
Have resW=screen.wid th; resH=screen.hei ght in javascript. How can I read these values in ASP.NET source code - Page_Load function of code behind?
Any suggestions?

Nov 19 '05 #5

Franck

DavidS wrote:

I've have the following in HTML code...
<script language="javas cript">
document.getEle mentById('resW' ) = window.screen.w idth;
document.getEle mentById('resH' ) = window.screen.h eight;
have you tried
document.getEle mentById('resW' ).value = window.screen.w idth;
document.getEle mentById('resH' ).value = window.screen.h eight;
instead? </script>
<input type=hidden name=resW id=resW runat=server>
<input type=hidden name=resH id=resH runat=server>

How can I access the values in ASP.NET (VB) code behind? I keep getting
null values when I use Request.Form("r esW") or resW.Value?

What am I missing?

"Eliyahu Goldin" wrote:

You need to pass the values from client to server side. The standard way is
to use hidden input controls:

<input type=hidden runat=server id=inhResW>

Eliyahu

"DavidS" <Da****@discuss ions.microsoft. com> wrote in message
news:BC****** *************** *************@m icrosoft.com...
Have resW=screen.wid th; resH=screen.hei ght in javascript. How can I read
these values in ASP.NET source code - Page_Load function of code behind?

Any suggestions?

Nov 19 '05 #6

DavidS

I still get nothing for resW.value!

"Eliyahu Goldin" wrote:

Change to:

document.getEle mentById('resW' ).value = window.screen.w idth;
document.getEle mentById('resH' ).value = window.screen.h eight;

and use resW.Value.

Eliyahu

"DavidS" <Da****@discuss ions.microsoft. com> wrote in message
news:9C******** *************** ***********@mic rosoft.com...
I've have the following in HTML code...
<script language="javas cript">
document.getEle mentById('resW' ) = window.screen.w idth;
document.getEle mentById('resH' ) = window.screen.h eight;
</script>
<input type=hidden name=resW id=resW runat=server>
<input type=hidden name=resH id=resH runat=server>

How can I access the values in ASP.NET (VB) code behind? I keep getting
null values when I use Request.Form("r esW") or resW.Value?

What am I missing?

"Eliyahu Goldin" wrote:
You need to pass the values from client to server side. The standard way is to use hidden input controls:

<input type=hidden runat=server id=inhResW>

Eliyahu

"DavidS" <Da****@discuss ions.microsoft. com> wrote in message
news:BC******** *************** ***********@mic rosoft.com...
> Have resW=screen.wid th; resH=screen.hei ght in javascript. How can I read > these values in ASP.NET source code - Page_Load function of code behind? >
> Any suggestions?

Nov 19 '05 #7

DavidS

Yes - but getting nothing (vbNullstring) for values in ASP.NET

"Franck" wrote:

DavidS wrote:
I've have the following in HTML code...
<script language="javas cript">
document.getEle mentById('resW' ) = window.screen.w idth;
document.getEle mentById('resH' ) = window.screen.h eight;

have you tried
document.getEle mentById('resW' ).value = window.screen.w idth;
document.getEle mentById('resH' ).value = window.screen.h eight;
instead?
</script>
<input type=hidden name=resW id=resW runat=server>
<input type=hidden name=resH id=resH runat=server>

How can I access the values in ASP.NET (VB) code behind? I keep getting
null values when I use Request.Form("r esW") or resW.Value?

What am I missing?

"Eliyahu Goldin" wrote:

You need to pass the values from client to server side. The standard way is
to use hidden input controls:

<input type=hidden runat=server id=inhResW>

Eliyahu

"DavidS" <Da****@discuss ions.microsoft. com> wrote in message
news:BC****** *************** *************@m icrosoft.com...

Have resW=screen.wid th; resH=screen.hei ght in javascript. How can I read
these values in ASP.NET source code - Page_Load function of code behind?

Any suggestions?

Nov 19 '05 #8

S. Justin Gengo

David,

After you bring up your page on the client do a view source and check the
hidden inputs and see if the value exists there or not.

If it doesn't, show us how you're calling the initial javascript on page
load.

--
Sincerely,

S. Justin Gengo, MCP
Web Developer / Programmer

www.aboutfortunate.com

"Out of chaos comes order."
Nietzsche
"DavidS" <Da****@discuss ions.microsoft. com> wrote in message
news:CE******** *************** ***********@mic rosoft.com...

I still get nothing for resW.value!

"Eliyahu Goldin" wrote:
Change to:

document.getEle mentById('resW' ).value = window.screen.w idth;
document.getEle mentById('resH' ).value = window.screen.h eight;

and use resW.Value.

Eliyahu

"DavidS" <Da****@discuss ions.microsoft. com> wrote in message
news:9C******** *************** ***********@mic rosoft.com...
> I've have the following in HTML code...
> <script language="javas cript">
> document.getEle mentById('resW' ) = window.screen.w idth;
> document.getEle mentById('resH' ) = window.screen.h eight;
> </script>
> <input type=hidden name=resW id=resW runat=server>
> <input type=hidden name=resH id=resH runat=server>
>
> How can I access the values in ASP.NET (VB) code behind? I keep
> getting
> null values when I use Request.Form("r esW") or resW.Value?
>
> What am I missing?
>
> "Eliyahu Goldin" wrote:
>
> > You need to pass the values from client to server side. The standard
> > way

is
> > to use hidden input controls:
> >
> > <input type=hidden runat=server id=inhResW>
> >
> > Eliyahu
> >
> > "DavidS" <Da****@discuss ions.microsoft. com> wrote in message
> > news:BC******** *************** ***********@mic rosoft.com...
> > > Have resW=screen.wid th; resH=screen.hei ght in javascript. How can
> > > I

read
> > > these values in ASP.NET source code - Page_Load function of code

behind?
> > >
> > > Any suggestions?
> >
> >
> >

Nov 19 '05 #9

DavidS

Any example code I can review to get this to work is appreciated. I'd think
this wouldn't be complicated - but right now, I'm getting null values from
solutions recommended. Again, I simply want to read the screen resolution on
the client. In the ASP.NET code - after a postback, I simply then want to be
able to read these javascript values and do respective processing.

Please advise - I have 3 replies - and now seem confused by the solution
presented by all.
"S. Justin Gengo" wrote:

David,

I can think of two things that may be happening.

The first is that there won't be any value in either of those fields until a
postback has occurred. The first time your code runs the page hasn't
displayed on the client and the javascript hasn't filled those fields.

The second (if the problem isn't the first) is that setting the controls as
runat="Server" may be interfering with the process. If you're going to use
Request.Form to get the values the controls don't have to be .Net controls.
You would only use runat="Server" if you want to reference the hidden inputs
as .Net server side controls. To do that you should declare them on your
page something like:

Protected WithEvents resW As System.Web.Html Controls.HtmlGe nericControl

(I typed that from memory, so double check the system declaration...)

But from the looks of things I would just remove the runat="Server" and then
do the Request.Form on postback only.

--
Sincerely,

S. Justin Gengo, MCP
Web Developer / Programmer

www.aboutfortunate.com

"Out of chaos comes order."
Nietzsche
"DavidS" <Da****@discuss ions.microsoft. com> wrote in message
news:9C******** *************** ***********@mic rosoft.com...
I've have the following in HTML code...
<script language="javas cript">
document.getEle mentById('resW' ) = window.screen.w idth;
document.getEle mentById('resH' ) = window.screen.h eight;
</script>
<input type=hidden name=resW id=resW runat=server>
<input type=hidden name=resH id=resH runat=server>

How can I access the values in ASP.NET (VB) code behind? I keep getting
null values when I use Request.Form("r esW") or resW.Value?

What am I missing?

"Eliyahu Goldin" wrote:
You need to pass the values from client to server side. The standard way
is
to use hidden input controls:

<input type=hidden runat=server id=inhResW>

Eliyahu

"DavidS" <Da****@discuss ions.microsoft. com> wrote in message
news:BC******** *************** ***********@mic rosoft.com...
> Have resW=screen.wid th; resH=screen.hei ght in javascript. How can I
> read
> these values in ASP.NET source code - Page_Load function of code
> behind?
>
> Any suggestions?

Nov 19 '05 #10

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