How to write "Create and Update" Methods in MVC controller

[jsG]

I flow the webinar "Get Started With The Kendo UI DataSource"
I use MVC .net for that
I create the read method and its work fine.

public JsonResult read() {

return this.Json(db.Weapons, JsonRequestBehavior.AllowGet);

}

I need to create the create and update method for that demo