onBeforeDataSending

fires before sending data to a server

id	string|number	the id of an item
state	string	the item's state (operation type)
data	object	serialized data that will be sent to the server side

Example

dp.attachEvent("onBeforeDataSending", function(id, state, data){
    //custom code here
    return true;
});

The event fires for each data update request (after onBeforeUpdate).

The event can be blocked. Returning false from event handler will prevent data sending.

Possible response statuses are the following:

• updated;
• inserted;
• deleted;
• invalid;
• error.

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