CheckBox selection

  • Thread starter Thread starter Guest
  • Start date Start date
G

Guest

Hi,

I have a 5 checkboxes and I would like to be able to use them as grouped
radiobuttons or a checkboxlist (one selection at the time) in the client side
without having to use a autopostback.
I think the only way is javascript but I don't know how. does any one have a
sample code to do that?


Cheers
 
Hi,
Hi,

I have a 5 checkboxes and I would like to be able to use them as grouped
radiobuttons or a checkboxlist (one selection at the time) in the client side
without having to use a autopostback.
I think the only way is javascript but I don't know how. does any one have a
sample code to do that?


Cheers
Click to expand...

I would recommend against that, because checkboxes are not destined to
behave like radiobuttons, it's confusing the user and is bad ergonomy.

That said, you can programatically check or uncheck a checkbox in
JavaScript using this code:

// The checkbox's ID is myCheckbox1
var cb = document.getElementById( "myCheckbox1" );

if ( cb != null
&& cb.checked != null )
{
cb.checked = true; // or false
}

HTH,
Laurent
 
Yes, but I could find any OnClient event for checkboxes to call this
javascript code and I tried to run it in "OnCheckedChanged" but it looks that
this event needs the autopostback turned on!!!?
sorry, i'm a beginner in asp but how can I run this code to be executed in
client side

Laurent Bugnion said:
Hi,
Hi,

I have a 5 checkboxes and I would like to be able to use them as grouped
radiobuttons or a checkboxlist (one selection at the time) in the client side
without having to use a autopostback.
I think the only way is javascript but I don't know how. does any one have a
sample code to do that?


Cheers
Click to expand...

I would recommend against that, because checkboxes are not destined to
behave like radiobuttons, it's confusing the user and is bad ergonomy.

That said, you can programatically check or uncheck a checkbox in
JavaScript using this code:

// The checkbox's ID is myCheckbox1
var cb = document.getElementById( "myCheckbox1" );

if ( cb != null
&& cb.checked != null )
{
cb.checked = true; // or false
}

HTH,
Laurent
--
Laurent Bugnion [MVP ASP.NET]
Software engineering, Blog: http://www.galasoft-LB.ch
PhotoAlbum: http://www.galasoft-LB.ch/pictures
Support children in Calcutta: http://www.calcutta-espoir.ch
Click to expand...
 
Hi,
Yes, but I could find any OnClient event for checkboxes to call this
javascript code and I tried to run it in "OnCheckedChanged" but it looks that
this event needs the autopostback turned on!!!?
sorry, i'm a beginner in asp but how can I run this code to be executed in
client side
Click to expand...

First you need to understand what is running on the client (JavaScript)
and what runs on the server (C#, VB.NET). The events you set in C# code
will be executed on the server, so of course it needs a postback.

Events exist in JavaScript too, however the syntax is different.

For example:

<input type="checkbox" onclick="doSomething();" />

HTH,
Laurent
Laurent Bugnion said:
Hi,
Hi,

I have a 5 checkboxes and I would like to be able to use them as grouped
radiobuttons or a checkboxlist (one selection at the time) in the client side
without having to use a autopostback.
I think the only way is javascript but I don't know how. does any one have a
sample code to do that?


Cheers
Click to expand...
I would recommend against that, because checkboxes are not destined to
behave like radiobuttons, it's confusing the user and is bad ergonomy.

That said, you can programatically check or uncheck a checkbox in
JavaScript using this code:

// The checkbox's ID is myCheckbox1
var cb = document.getElementById( "myCheckbox1" );

if ( cb != null
&& cb.checked != null )
{
cb.checked = true; // or false
}

HTH,
Laurent
--
Laurent Bugnion [MVP ASP.NET]
Software engineering, Blog: http://www.galasoft-LB.ch
PhotoAlbum: http://www.galasoft-LB.ch/pictures
Support children in Calcutta: http://www.calcutta-espoir.ch
Click to expand...
Click to expand...
 
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