[CLOSED] Adding Checkbox items to checkbox group during a postback?

[vedagopal2004]

Hi Team,

I am trying to add checkbox items during a post back. But it is showing a java script error as " Expected ';' ".

I have a user control to which i am passing the object (Question object)to bound. During page load the object is null. But from the page i am passing a object instance to the user control and by calling a method LoadData i am trying to add items to the checkbox group based on the options provided in the object (Question).

I am using the coolite version V 8.1. By reading the forum topics I understand that during a post back coolite controls cannot be added dynamically.

Is that true? If so, could you please suggest me any workaround for this. This is mandatory in my project.

Regards,
Gopal.
Bizbites Pvt. Limited.

[Vladimir]

Hi,

Coolite control cannot be added during AjaxEvent. But you can create it during pure PostBack. Please show test sample which demonstrates how you try to add checkbox to the group

[vedagopal2004]

Hi vladimir,

Sorry for not mentioning this. It is not a pure post back. we are using an asp update panel (with UpdateMmode = always).


Will this make any difference?


Regards,


Gopal.


Bizbites Pvt. Limited.

[Vladimir]

Hi Gopal,

Please provide test example which demonstrates the issue. If update panel updates whole checkbox group then it should works

[vedagopal2004]

Hi vladimir,

Thanks for your quick reply.

Please see the attachment for test example.

Waiting for your reply. :-)

Regards,
Gopal
Bizbites Pvt. Limited.

[Vladimir]

Hi,

The problem related with Items collection clear. Before clear Items you have to remove those items from Controls and LazyInit collection (by the way, in 1.0 version it is not required anymore)

OptionsQuestion class, LoadData method.

Before the following line

cbgOptionsQuestion.Items.Clear();

Add the following code

foreach (Coolite.Ext.Web.Component component in cbgOptionsQuestion.Items)
                    {
                        cbgOptionsQuestion.Controls.Remove(component);
                        cbgOptionsQuestion.LazyItems.Remove(component);
                    }

[vedagopal2004]

Hi vladimir,

Thank you very much. It solved my problem now. :-)

Regards,
Gopal.

[vedagopal2004]

Hi Vladimir Shcheglov,

I am getting a problem with adding an ajax event to the check box item when adding in post back.

I have added a ajax event "check" for each check box item while adding. But it is throwing an error that

"The control with ID 'ucSectionEvaluator_ctl09_ctl05' not found"

Could you please suggest anything in this.

I have attached a test sample again for this issue.

Thanks in advance
Regards,
Gopal.

[Vladimir]

Hi,

Any dynamic control with server side event handler must be recreated on each request (even AjaxEvent). You don't do that. Therefore ScriptManager cannot find event handler. Please always recreate checkboxes or use client side events (Listeners) and call AjaxMethod (AjaxMethod doesn't require controls)

[vedagopal2004]

Hi Vladimir Shcheglov,

I tried what you said. I created a ajaxmethod in user control (OptionsQuestion) and tried to call using checkbox check event listener.

But it is becoming as a failure request saying "Internal Server Error".

Please see the attachement with trial.

Thanks in Advance.

Regards,
Gopal.