DHTMLX Scheduler possibilities

Scheduler Javascript
#1

I still try to verify if I can use DHTMLX Scheduler for .Net in a potential project we try to win.

The project have to be usable with all devices (mobile or computer).
So we decide to create a Web Form project with a view dedicated to each device.
We are realizing a Proof Of Concept (POC).

We have to add server-side rules to limit the actions of the users.
For example, a user cannot add an event on the scheduler if another event exists for the same period in a particular state.

How can we develop this kind of rules and call them from the client-side code?

In our POC, we add a button to the lightbox to change some state of the event but we can only call javascript method.

How can we call code-behind method from the javascript method we add for the new button?

#2

From js code, assigned to the button you can trigger any serve side action, by ajax call

function runOnClick(){ dhtmlxAjax.post(model/validate", "value="+scheduler.getEvent(id).property, function(result){ var response = result.xmlDoc.responseText; alert(response); }); );