Checkboxlist inside Repeater - doesn't fire click event for Checkboxlist

[JD]

Hello,
I have a problem with checkboxlist inside Repeater (in ASP.NET page).
I am able to create Checkboxlist and bind it (inside Repeater_ItemBound -
including setting checked/unchecked). Checkboxlist has Autopostback=true so
whenever I click on checkbox, the page is submitted to the server.

Here starts my problem:
I am not able to capture the click event of checkbox list to find out which
checkbox was clicked (which generated click event) and retrieve the value
associated with it (for further processing).
I have List_SelectedIndexChanged function but it never fires. I am obviously
missing something, I don't undestand event bubling enough.
Any idea? Any help?
Thanks
JD

 

[S. Justin Gengo]

JD,

I have some sample code in the code library of my web site,
www.aboutfortunate.com, which shows how to get the value of the row clicked
in a datagrid when a check box is checked.

While it doesn't use a repeater or a checkbox list the process is very
similar to what you need to do and quite a bit simpler so it may be good for
you to give it a glance. It may help.

Click the "code library" link on the top right of the home page and then use
the search box to search for: "reference a checkbox" or something similar
and you'll find it.

Pay particular attention to how I'm using "oncheckedchanged" in the check
boxe's auto post back to call the proper subroutine when the checkbox is
clicked.

--
Sincerely,

S. Justin Gengo, MCP
Web Developer / Programmer

www.aboutfortunate.com

"Out of chaos comes order."
Nietzsche

 

[marinov]

have you tried to create the event of the checkboxlist like

<asp:CheckBoxList id=.... OnSelectedIndexChanged="YourEventName"
AutoPostBack=True>
.....

this will tell to the asp.net that when a checkbox is clicked the
YourEventName event will fired, BUT you have to declare your event as Public
other wise asp.net won't find it

Hope This Helps
Regards
Martin Marinov

 

[Cristian Suazo]

Hi,

an important thing in all this is that you recreate the control before the
viewstate is restored, for info when everything happens see this link:
http://msdn.microsoft.com/library/d...guide/html/cpconControlExecutionLifecycle.asp .
If the same control structure doesn't exists when the viewstate is restored
it will not be able to "discover" the events. As Marintov wrote you have
also to define where this event is going to be handled in the "tag" of the
checkbox list.

So what does all this mean, basically this (only pseudo code for how the
behind code could be structured.):


Sub Page_Init()
// code to bind your repeater
// after the page init the viewstate will be restored.
End Sub

Sub ChkBoxlist_IndexChange()
// here is your event!
// if you want to access some other control that is within the same
repeater element use the parent property of the reperater.
End Sub


I hope this clears things up
Cheers
Cristian

 

[dbeltran]

Hi There,

Where you able to find out how to process clicks on the checkboxlist inside a repeater?
Please let me know, as I am trying to get the same thing to work.

Thank you!

DBeltran

Hello,
I have a problem with checkboxlist inside Repeater (in ASP.NET page).
I am able to create Checkboxlist and bind it (inside Repeater_ItemBound -
including setting checked/unchecked). Checkboxlist has Autopostback=true so
whenever I click on checkbox, the page is submitted to the server.

Here starts my problem:
I am not able to capture the click event of checkbox list to find out which
checkbox was clicked (which generated click event) and retrieve the value
associated with it (for further processing).
I have List_SelectedIndexChanged function but it never fires. I am obviously
missing something, I don't undestand event bubling enough.
Any idea? Any help?
Thanks
JD

 

[NetArchitect]

Fire event from dropdownlist inside repeater or datagrid

Declare the event on your dropdownlist placed inside your repeater or datagrid

<aspropDownList
OnSelectedIndexChanged="GridItems_SelectedIndexChanged" ...>

Then in your code behind:

protected void GridItems_SelectedIndexChanged(object sender, System.EventArgs e)
{
//You get the line that threw the event
DataGridItem dgi = (DataGridItem)(((Control)sender).NamingContainer);

//You can get the value of the dropdownlist that fired the event
Trace.Warn("selected index: " + ((DropDownList)dgi.Cells[3].Controls[1]).SelectedIndex.ToString());

...

}