In an aspx page I have declared an Image control:
<asp:Image id="myImage" runat="server"> </asp:Image>
In the code-behind I populate it's ImageURL property, like this:
myImage.ImageUr l = "some.gif";
Then, in client-side JavaScript, the user can cause the image to be
replaced, like this:
document.all("m yImage").src = "other.gif" ;
Here's the problem: on postback, the image control's .ImageUrl property
still contains "some.gif" and not "other.gif" as I am needing.
What do I need to do to receive - during postback - the value set in the
client by the JavaScript?
Thanks! 5  2245 
After postback, the value of ImageUrl is coming from the control's ViewState.
One solution would be to set the value of a hidden field when you set the
image's src attribute. The value of the hidden field will get posted back
correctly.
"Guadala Harry" wrote: In an aspx page I have declared an Image control:
<asp:Image id="myImage" runat="server"> </asp:Image>
In the code-behind I populate it's ImageURL property, like this:
myImage.ImageUr l = "some.gif";
Then, in client-side JavaScript, the user can cause the image to be
replaced, like this:
document.all("m yImage").src = "other.gif" ;
Here's the problem: on postback, the image control's .ImageUrl property
still contains "some.gif" and not "other.gif" as I am needing.
What do I need to do to receive - during postback - the value set in the
client by the JavaScript?
Thanks!
Thanks - I thought about going the hidden field route - but was hoping for
some solution that wouldn't require adding another field or control that
needs synchronizing with the original Image control.
Any other ideas?
Thanks again...
-G
"Brad Quinn" <Br*******@disc ussions.microso ft.com> wrote in message
news:E0******** *************** ***********@mic rosoft.com... After postback, the value of ImageUrl is coming from the control's
ViewState.
One solution would be to set the value of a hidden field when you set the
image's src attribute. The value of the hidden field will get posted back
correctly.
"Guadala Harry" wrote:
In an aspx page I have declared an Image control:
<asp:Image id="myImage" runat="server"> </asp:Image>
In the code-behind I populate it's ImageURL property, like this:
myImage.ImageUr l = "some.gif";
Then, in client-side JavaScript, the user can cause the image to be
replaced, like this:
document.all("m yImage").src = "other.gif" ;
Here's the problem: on postback, the image control's .ImageUrl property
still contains "some.gif" and not "other.gif" as I am needing.
What do I need to do to receive - during postback - the value set in the
client by the JavaScript?
Thanks!
Can you make the code in your codebehind only execute the first time it
executes? i.e.
if (!Page.IsPostba ck)
myImage.ImageUr l = "some.gif";
Toby Mathews
"Guadala Harry" <GM**@NoSpam.co m> wrote in message
news:%2******** ********@TK2MSF TNGP10.phx.gbl. .. Thanks - I thought about going the hidden field route - but was hoping for
some solution that wouldn't require adding another field or control that
needs synchronizing with the original Image control.
Any other ideas?
Thanks again...
-G
"Brad Quinn" <Br*******@disc ussions.microso ft.com> wrote in message
news:E0******** *************** ***********@mic rosoft.com... After postback, the value of ImageUrl is coming from the control's
ViewState.
One solution would be to set the value of a hidden field when you set
the image's src attribute. The value of the hidden field will get posted
back correctly.
"Guadala Harry" wrote:
In an aspx page I have declared an Image control:
<asp:Image id="myImage" runat="server"> </asp:Image>
In the code-behind I populate it's ImageURL property, like this:
myImage.ImageUr l = "some.gif";
Then, in client-side JavaScript, the user can cause the image to be
replaced, like this:
document.all("m yImage").src = "other.gif" ;
Here's the problem: on postback, the image control's .ImageUrl
property still contains "some.gif" and not "other.gif" as I am needing.
What do I need to do to receive - during postback - the value set in
the client by the JavaScript?
Thanks!
That's not really relevant to the problem - it would be IF there was an
issue with postback processing walking on the value set in the client - but
issue is that the value set in the client code is never making it to the
server (unless I explicitly stuff the value into a hidden field - which I
don't want to do unless I really must).
Thanks anyway.
"Toby Mathews" <to************ ***@yahoo.spamf ree.co.uk> wrote in message
news:cf******** **@thorium.cix. co.uk... Can you make the code in your codebehind only execute the first time it
executes? i.e.
if (!Page.IsPostba ck)
myImage.ImageUr l = "some.gif";
Toby Mathews
"Guadala Harry" <GM**@NoSpam.co m> wrote in message
news:%2******** ********@TK2MSF TNGP10.phx.gbl. .. Thanks - I thought about going the hidden field route - but was hoping
for some solution that wouldn't require adding another field or control that
needs synchronizing with the original Image control.
Any other ideas?
Thanks again...
-G
"Brad Quinn" <Br*******@disc ussions.microso ft.com> wrote in message
news:E0******** *************** ***********@mic rosoft.com... After postback, the value of ImageUrl is coming from the control's
ViewState.
One solution would be to set the value of a hidden field when you set
the image's src attribute. The value of the hidden field will get posted back correctly.
"Guadala Harry" wrote:
> In an aspx page I have declared an Image control:
> <asp:Image id="myImage" runat="server"> </asp:Image>
>
> In the code-behind I populate it's ImageURL property, like this:
> myImage.ImageUr l = "some.gif";
>
> Then, in client-side JavaScript, the user can cause the image to be
> replaced, like this:
> document.all("m yImage").src = "other.gif" ;
>
> Here's the problem: on postback, the image control's .ImageUrl property > still contains "some.gif" and not "other.gif" as I am needing.
>
> What do I need to do to receive - during postback - the value set in the > client by the JavaScript?
>
> Thanks!
>
>
>
>
Harry,
Sorry, I didn't read your message properly first time round. I'm not sure
how else you could achieve what you want to do other than how you decribe.
Good luck,
Toby
"Guadala Harry" <GM**@NoSpam.co m> wrote in message
news:%2******** ********@tk2msf tngp13.phx.gbl. .. That's not really relevant to the problem - it would be IF there was an
issue with postback processing walking on the value set in the client -
but issue is that the value set in the client code is never making it to the
server (unless I explicitly stuff the value into a hidden field - which I
don't want to do unless I really must).
Thanks anyway.
"Toby Mathews" <to************ ***@yahoo.spamf ree.co.uk> wrote in message
news:cf******** **@thorium.cix. co.uk... Can you make the code in your codebehind only execute the first time it
executes? i.e.
if (!Page.IsPostba ck)
myImage.ImageUr l = "some.gif";
Toby Mathews
"Guadala Harry" <GM**@NoSpam.co m> wrote in message
news:%2******** ********@TK2MSF TNGP10.phx.gbl. .. Thanks - I thought about going the hidden field route - but was hoping for some solution that wouldn't require adding another field or control
that needs synchronizing with the original Image control.
Any other ideas?
Thanks again...
-G
"Brad Quinn" <Br*******@disc ussions.microso ft.com> wrote in message
news:E0******** *************** ***********@mic rosoft.com...
> After postback, the value of ImageUrl is coming from the control's
ViewState.
>
> One solution would be to set the value of a hidden field when you
set the > image's src attribute. The value of the hidden field will get
posted back > correctly.
>
> "Guadala Harry" wrote:
>
> > In an aspx page I have declared an Image control:
> > <asp:Image id="myImage" runat="server"> </asp:Image>
> >
> > In the code-behind I populate it's ImageURL property, like this:
> > myImage.ImageUr l = "some.gif";
> >
> > Then, in client-side JavaScript, the user can cause the image to
be > > replaced, like this:
> > document.all("m yImage").src = "other.gif" ;
> >
> > Here's the problem: on postback, the image control's .ImageUrl
property > > still contains "some.gif" and not "other.gif" as I am needing.
> >
> > What do I need to do to receive - during postback - the value set
in the > > client by the JavaScript?
> >
> > Thanks!
> >
> >
> >
> >
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