Basic Web Form... A few text boxes and a checkbox - and a card reader...
The effect I want to accomplish is this:
The basic credit card fields are there and can be filled out. But if the
user swipes the card, I want to fill out the fields automatically and make
them read only. (So far I can do this.)
But I also want a checkbox to appear that indicates the card was swiped.
The user can clear the checkbox, re-enabling the fields so they can be
edited, but then I will no longer consider the data as being swiped. I want
the check box to disappear if they clear it.
Using server controls, if I create a checkbox, but make it not visible, then
it's not available at the client side to work with from client side code.
So I would need to send some flag back to the server to indicate a post back
and have the page re-rendered properly. But how do send info to the server
like that without having a visible control to attach the data to?
(Does this make any sense? Not sure if I'm explaining it well.)
Is there a way to send a value back to the server, in a postback, where the
data is not a property of a server control that's tracking viewstate? The
session object is only available on the server side right?
Any guidance here is appreciated. Thanks.
Jerry
6  1480 
to send additional value to server , one commonly used method is
a HiddenControl (you will access it like Request.Forms["HiddenContrlNa me"]
from code behind)
or a TextBox Webcontrol with size 0 or attribute style='display: none' ..
But if the only purpose of post back is to display/check the checkbox ,
probabaly a better approach is to do the display/check in the client side
javascript ..
Instead of settign Visibility=Fals e, you would just add an attribute to
make it hidden , but still available at client code
CheckBoxName.At tributes.Add("s tyle='display:n one'")
"Jerry Camel" wrote: Basic Web Form... A few text boxes and a checkbox - and a card reader...
The effect I want to accomplish is this:
The basic credit card fields are there and can be filled out. But if the
user swipes the card, I want to fill out the fields automatically and make
them read only. (So far I can do this.)
But I also want a checkbox to appear that indicates the card was swiped.
The user can clear the checkbox, re-enabling the fields so they can be
edited, but then I will no longer consider the data as being swiped. I want
the check box to disappear if they clear it.
Using server controls, if I create a checkbox, but make it not visible, then
it's not available at the client side to work with from client side code.
So I would need to send some flag back to the server to indicate a post back
and have the page re-rendered properly. But how do send info to the server
like that without having a visible control to attach the data to?
(Does this make any sense? Not sure if I'm explaining it well.)
Is there a way to send a value back to the server, in a postback, where the
data is not a property of a server control that's tracking viewstate? The
session object is only available on the server side right?
Any guidance here is appreciated. Thanks.
Jerry
Okay... I can have the checkbox on the form and available with 'Display:
None'...
But I can't seem to find the proper syntax to change the display state and
make it visible on the client side...
Thanks.
"Sreejith Ram" <Sr*********@di scussions.micro soft.com> wrote in message
news:43******** *************** ***********@mic rosoft.com... to send additional value to server , one commonly used method is
a HiddenControl (you will access it like Request.Forms["HiddenContrlNa me"]
from code behind)
or a TextBox Webcontrol with size 0 or attribute style='display: none' ..
But if the only purpose of post back is to display/check the checkbox ,
probabaly a better approach is to do the display/check in the client side
javascript ..
Instead of settign Visibility=Fals e, you would just add an attribute to
make it hidden , but still available at client code
CheckBoxName.At tributes.Add("s tyle='display:n one'")
"Jerry Camel" wrote:
Basic Web Form... A few text boxes and a checkbox - and a card
reader... The effect I want to accomplish is this:
The basic credit card fields are there and can be filled out. But if
the user swipes the card, I want to fill out the fields automatically and
make them read only. (So far I can do this.)
But I also want a checkbox to appear that indicates the card was swiped.
The user can clear the checkbox, re-enabling the fields so they can be
edited, but then I will no longer consider the data as being swiped. I
want the check box to disappear if they clear it.
Using server controls, if I create a checkbox, but make it not visible,
then it's not available at the client side to work with from client side
code. So I would need to send some flag back to the server to indicate a post
back and have the page re-rendered properly. But how do send info to the
server like that without having a visible control to attach the data to?
(Does this make any sense? Not sure if I'm explaining it well.)
Is there a way to send a value back to the server, in a postback, where
the data is not a property of a server control that's tracking viewstate?
The session object is only available on the server side right?
Any guidance here is appreciated. Thanks.
Jerry
Syntax to display ?
document.getEle mentById("Check BoxClientName") .style.display= '' ;
document.getEle mentById("Check BoxClientName") .Checked = true;
this may help... http://www.w3schools.com/htmldom/dom_obj_checkbox.asp http://www.w3schools.com/htmldom/dom...yle.asp#layout
"Jerry Camel" wrote: Okay... I can have the checkbox on the form and available with 'Display:
None'...
But I can't seem to find the proper syntax to change the display state and
make it visible on the client side...
Thanks.
"Sreejith Ram" <Sr*********@di scussions.micro soft.com> wrote in message
news:43******** *************** ***********@mic rosoft.com... to send additional value to server , one commonly used method is
a HiddenControl (you will access it like Request.Forms["HiddenContrlNa me"]
from code behind)
or a TextBox Webcontrol with size 0 or attribute style='display: none' ..
But if the only purpose of post back is to display/check the checkbox ,
probabaly a better approach is to do the display/check in the client side
javascript ..
Instead of settign Visibility=Fals e, you would just add an attribute to
make it hidden , but still available at client code
CheckBoxName.At tributes.Add("s tyle='display:n one'")
"Jerry Camel" wrote:
Basic Web Form... A few text boxes and a checkbox - and a card reader... The effect I want to accomplish is this:
The basic credit card fields are there and can be filled out. But if the user swipes the card, I want to fill out the fields automatically and make them read only. (So far I can do this.)
But I also want a checkbox to appear that indicates the card was swiped.
The user can clear the checkbox, re-enabling the fields so they can be
edited, but then I will no longer consider the data as being swiped. I want the check box to disappear if they clear it.
Using server controls, if I create a checkbox, but make it not visible, then it's not available at the client side to work with from client side code. So I would need to send some flag back to the server to indicate a post back and have the page re-rendered properly. But how do send info to the server like that without having a visible control to attach the data to?
(Does this make any sense? Not sure if I'm explaining it well.)
Is there a way to send a value back to the server, in a postback, where the data is not a property of a server control that's tracking viewstate? The session object is only available on the server side right?
Any guidance here is appreciated. Thanks.
Jerry
Thanks, but this doesn't seem to have any effect. I tried changing the
style.display property to all kinds of values, but the checkbox never
appears...
Jerry
"Sreejith Ram" <Sr*********@di scussions.micro soft.com> wrote in message
news:51******** *************** ***********@mic rosoft.com... Syntax to display ?
document.getEle mentById("Check BoxClientName") .style.display= '' ;
document.getEle mentById("Check BoxClientName") .Checked = true;
this may help...
http://www.w3schools.com/htmldom/dom_obj_checkbox.asp
http://www.w3schools.com/htmldom/dom...yle.asp#layout
"Jerry Camel" wrote:
Okay... I can have the checkbox on the form and available with
'Display: None'...
But I can't seem to find the proper syntax to change the display state
and make it visible on the client side...
Thanks.
"Sreejith Ram" <Sr*********@di scussions.micro soft.com> wrote in message
news:43******** *************** ***********@mic rosoft.com... to send additional value to server , one commonly used method is
a HiddenControl (you will access it like
Request.Forms["HiddenContrlNa me"] from code behind)
or a TextBox Webcontrol with size 0 or attribute style='display: none'
...
But if the only purpose of post back is to display/check the checkbox
, probabaly a better approach is to do the display/check in the client
side javascript ..
Instead of settign Visibility=Fals e, you would just add an attribute
to make it hidden , but still available at client code
CheckBoxName.At tributes.Add("s tyle='display:n one'")
"Jerry Camel" wrote:
> Basic Web Form... A few text boxes and a checkbox - and a card
reader... > The effect I want to accomplish is this:
>
> The basic credit card fields are there and can be filled out. But
if the > user swipes the card, I want to fill out the fields automatically
and make > them read only. (So far I can do this.)
>
> But I also want a checkbox to appear that indicates the card was
swiped. > The user can clear the checkbox, re-enabling the fields so they can
be > edited, but then I will no longer consider the data as being swiped.
I want > the check box to disappear if they clear it.
>
> Using server controls, if I create a checkbox, but make it not
visible, then > it's not available at the client side to work with from client side
code. > So I would need to send some flag back to the server to indicate a
post back > and have the page re-rendered properly. But how do send info to the
server > like that without having a visible control to attach the data to?
>
> (Does this make any sense? Not sure if I'm explaining it well.)
>
> Is there a way to send a value back to the server, in a postback,
where the > data is not a property of a server control that's tracking
viewstate? The > session object is only available on the server side right?
>
> Any guidance here is appreciated. Thanks.
>
> Jerry
>
>
>
Obviously there is some thing not right other than the syntax.. :) .. Is
there any javascript error when you call the function to display the
checkbox?...
if still no luck, you may want to create a simple HTML page with only
following code in it...
<INPUT TYPE=checkbox ID=chk1 style='display: hidden'>
<INPUT TYPE=button ID=btn1 onClick="toggle ()" value="Click to Toggle
Display" >
<script>
function toggle(id)
{
el = document.getEle mentById("chk1" );
var display = el.style.displa y ? '' : 'none';
el.style.displa y = display;
}
</script>
Once this works, you can compare with the HTML your aspx generated and that
may help in finding the issue..
This link got a working sample... with code...pls see if this helps.. http://www.sam-i-am.com/work/sandbox...e_display.html
"Jerry Camel" wrote: Thanks, but this doesn't seem to have any effect. I tried changing the
style.display property to all kinds of values, but the checkbox never
appears...
Jerry
"Sreejith Ram" <Sr*********@di scussions.micro soft.com> wrote in message
news:51******** *************** ***********@mic rosoft.com... Syntax to display ?
document.getEle mentById("Check BoxClientName") .style.display= '' ;
document.getEle mentById("Check BoxClientName") .Checked = true;
this may help...
http://www.w3schools.com/htmldom/dom_obj_checkbox.asp
http://www.w3schools.com/htmldom/dom...yle.asp#layout
"Jerry Camel" wrote:
Okay... I can have the checkbox on the form and available with 'Display: None'...
But I can't seem to find the proper syntax to change the display state and make it visible on the client side...
Thanks.
"Sreejith Ram" <Sr*********@di scussions.micro soft.com> wrote in message
news:43******** *************** ***********@mic rosoft.com...
> to send additional value to server , one commonly used method is
>
> a HiddenControl (you will access it like Request.Forms["HiddenContrlNa me"] > from code behind)
>
> or a TextBox Webcontrol with size 0 or attribute style='display: none' ... >
> But if the only purpose of post back is to display/check the checkbox , > probabaly a better approach is to do the display/check in the client side > javascript ..
>
> Instead of settign Visibility=Fals e, you would just add an attribute to > make it hidden , but still available at client code
>
> CheckBoxName.At tributes.Add("s tyle='display:n one'")
>
>
>
> "Jerry Camel" wrote:
>
> > Basic Web Form... A few text boxes and a checkbox - and a card
reader...
> > The effect I want to accomplish is this:
> >
> > The basic credit card fields are there and can be filled out. But if the
> > user swipes the card, I want to fill out the fields automatically and make
> > them read only. (So far I can do this.)
> >
> > But I also want a checkbox to appear that indicates the card was swiped. > > The user can clear the checkbox, re-enabling the fields so they can be > > edited, but then I will no longer consider the data as being swiped. I want
> > the check box to disappear if they clear it.
> >
> > Using server controls, if I create a checkbox, but make it not visible, then
> > it's not available at the client side to work with from client side
code.
> > So I would need to send some flag back to the server to indicate a post back
> > and have the page re-rendered properly. But how do send info to the
server
> > like that without having a visible control to attach the data to?
> >
> > (Does this make any sense? Not sure if I'm explaining it well.)
> >
> > Is there a way to send a value back to the server, in a postback, where the
> > data is not a property of a server control that's tracking viewstate? The
> > session object is only available on the server side right?
> >
> > Any guidance here is appreciated. Thanks.
> >
> > Jerry
> >
> >
> >
I'll play with it. Thanks for your help. I was trying to use vbscript, but
I may have to switch to javascript...
Jerry
"Sreejith Ram" <Sr*********@di scussions.micro soft.com> wrote in message
news:54******** *************** ***********@mic rosoft.com... Obviously there is some thing not right other than the syntax.. :) .. Is
there any javascript error when you call the function to display the
checkbox?...
if still no luck, you may want to create a simple HTML page with only
following code in it...
<INPUT TYPE=checkbox ID=chk1 style='display: hidden'>
<INPUT TYPE=button ID=btn1 onClick="toggle ()" value="Click to Toggle
Display" >
<script>
function toggle(id)
{
el = document.getEle mentById("chk1" );
var display = el.style.displa y ? '' : 'none';
el.style.displa y = display;
}
</script>
Once this works, you can compare with the HTML your aspx generated and
that may help in finding the issue..
This link got a working sample... with code...pls see if this helps..
http://www.sam-i-am.com/work/sandbox...e_display.html
"Jerry Camel" wrote:
Thanks, but this doesn't seem to have any effect. I tried changing the
style.display property to all kinds of values, but the checkbox never
appears...
Jerry
"Sreejith Ram" <Sr*********@di scussions.micro soft.com> wrote in message
news:51******** *************** ***********@mic rosoft.com... Syntax to display ?
document.getEle mentById("Check BoxClientName") .style.display= '' ; document.getEle mentById("Check BoxClientName") .Checked =
true;
this may help...
http://www.w3schools.com/htmldom/dom_obj_checkbox.asp
http://www.w3schools.com/htmldom/dom...yle.asp#layout
"Jerry Camel" wrote:
> Okay... I can have the checkbox on the form and available with
'Display: > None'...
>
> But I can't seem to find the proper syntax to change the display
state and > make it visible on the client side...
>
> Thanks.
>
>
> "Sreejith Ram" <Sr*********@di scussions.micro soft.com> wrote in
message > news:43******** *************** ***********@mic rosoft.com...
> > to send additional value to server , one commonly used method is
> >
> > a HiddenControl (you will access it like
Request.Forms["HiddenContrlNa me"] > > from code behind)
> >
> > or a TextBox Webcontrol with size 0 or attribute
style='display: none' ... > >
> > But if the only purpose of post back is to display/check the
checkbox , > > probabaly a better approach is to do the display/check in the
client side > > javascript ..
> >
> > Instead of settign Visibility=Fals e, you would just add an
attribute to > > make it hidden , but still available at client code
> >
> > CheckBoxName.At tributes.Add("s tyle='display:n one'")
> >
> >
> >
> > "Jerry Camel" wrote:
> >
> > > Basic Web Form... A few text boxes and a checkbox - and a card
> reader...
> > > The effect I want to accomplish is this:
> > >
> > > The basic credit card fields are there and can be filled out.
But if > the
> > > user swipes the card, I want to fill out the fields
automatically and > make
> > > them read only. (So far I can do this.)
> > >
> > > But I also want a checkbox to appear that indicates the card was
swiped. > > > The user can clear the checkbox, re-enabling the fields so they
can be > > > edited, but then I will no longer consider the data as being
swiped. I > want
> > > the check box to disappear if they clear it.
> > >
> > > Using server controls, if I create a checkbox, but make it not
visible, > then
> > > it's not available at the client side to work with from client
side > code.
> > > So I would need to send some flag back to the server to indicate
a post > back
> > > and have the page re-rendered properly. But how do send info to
the > server
> > > like that without having a visible control to attach the data
to? > > >
> > > (Does this make any sense? Not sure if I'm explaining it well.)
> > >
> > > Is there a way to send a value back to the server, in a
postback, where > the
> > > data is not a property of a server control that's tracking
viewstate? > The
> > > session object is only available on the server side right?
> > >
> > > Any guidance here is appreciated. Thanks.
> > >
> > > Jerry
> > >
> > >
> > >
>
>
>
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