injecting combobox client event handler from code behind

[Aarsh]

Hello !

I am trying to 'detect' if change is made to my page, containing telerik and asp.net controls.RadTextboxes behave as expected Code beneath the one for DropDownList does not work. I tried to have just a simple alert but though radComboBox does not seem to be playing fair ...

I am using traditional ASP.NET master/content page scenario. And the content page loads up as a radTab of a master page.

RadTextBox ( Works ! )

   ControlExtension.All(this.Controls).OfType<RadTextBox>().ToList().ForEach(radTb => radTb.Attributes.Add("onchange", "noticeChange(" + radTb.ClientID + ");"));
ControlExtension.All(this.Controls).OfType<RadTextBox>().ToList().ForEach(radTb => radTb.Attributes.Add("onkeydown", "noticeChange(" + radTb.ClientID + ");"))


DropDownList ( Works ! )

   ControlExtension.All(this.Controls).OfType<DropDownList>().ToList().ForEach(dd => dd.Attributes.Add("onChange", "noticeChange(" + dd.ClientID + ");"));
ControlExtension.All(this.Controls).OfType<DropDownList>().ToList().ForEach(dd => dd.Attributes.Add("onselectedindexchanged", "noticeChange(" + dd.ClientID + ");"));

RadComboBox ( Doesn't )

   ControlExtension.All(this.Controls).OfType<RadComboBox>().ToList().ForEach(radDd => radDd.Attributes.Add("onclientselectedindexchanging", "noticeChange(" + radDd.ClientID + ");"));
ControlExtension.All(this.Controls).OfType<RadComboBox>().ToList().ForEach(radDd => radDd.Attributes.Add("OnClientSelectedIndexChanged", "noticeChange(" + radDd.ClientID + ");"));
ControlExtension.All(this.Controls).OfType<RadComboBox>().ToList().ForEach(radDd => radDd.Attributes.Add("onclienttextchange", "noticeChange(" + radDd.ClientID + ");"));

Thanks,
-Aarsh

Added

I tried following, just in the case if you're wanting to suggest. It did not worked. The above approach at least added an attirb when I observed in F12 of IE9 but this guy do not seem to be working.

Additionally, it behaves as if it has a JavaScript error

(my radTab do not fill out in the screen upon JavaScript error, if I use the code posted underneath, this happened, so ... )

ControlExtension.All(this.Controls).OfType<RadComboBox>().ToList().ForEach(radDd => radDd.OnClientSelectedIndexChanged = "noticeChange(" + radDd.ClientID + ")");
ControlExtension.All(this.Controls).OfType<RadComboBox>().ToList().ForEach(radDd => radDd.OnClientTextChange = "noticeChange(" + radDd.ClientID + ");");

[Aarsh]

Can anyone please help me out here ?

[Hristo Valyavicharski]

Hi Aarsh,

Change the noticeChange function to have two parameters sender and args. Do not pass control ID to this function. You can get it from sender.get_id():

function noticeChange(sender, args) {
    alert(sender.get_id());
}

ControlExtension
         .All(this.Controls)
         .OfType<RadTextBox>()
         .ToList()
         .ForEach(radTb => radTb.ClientEvents.OnValueChanged = "noticeChange");

     ControlExtension
         .All(this.Controls)
         .OfType<RadTextBox>()
         .ToList().ForEach(radTb => radTb.ClientEvents.OnKeyPress = "noticeChange");

     ControlExtension
         .All(this.Controls)
         .OfType<RadComboBox>()
         .ToList()
         .ForEach(radCb => radCb.OnClientSelectedIndexChanged = "noticeChange");

All the best,
Hristo Valyavicharski
the Telerik team