ASP.NET MVC 2.0 JsonRequestBehavior Global Setting

Question

ASP.NET MVC 2.0 will now, by default, throw an exception when an action attempts to return JSON in response to a GET request. I know this can be overridden on a method by method basis by using JsonRequestBehavior.AllowGet, but is it possible to set on a controller or higher basis (possibly the web.config)?

Update: Per Levi's comment, this is what I ended up using-

protected override JsonResult Json(object data, string contentType, System.Text.Encoding contentEncoding)
{
    return Json(data, contentType, JsonRequestBehavior.AllowGet);
}

Answer 1

This, like other MVC-specific settings, is not settable via Web.config. But you have two options:

1. Override the Controller.Json(object, string, Encoding) overload to call Json(object, string, Encoding, JsonRequestBehavior), passing JsonRequestBehavior.AllowGet as the last argument. If you want this to apply to all controllers, then do this inside an abstract base controller class, then have all your controllers subclass that abstract class.

2. Make an extension method MyJson(this Controller, ...) which creates a JsonResult and sets the appropriate properties, then call it from your controller via this.MyJson(...).

Answer 2

MVC 2 block Json for GET requests for security reasons. If you want to override that behavior, check out the overload for Json that accepts a JsonRequestBehavior parameter.

public ActionResult Index()

{

   return Json(data, JsonRequestBehavior.AllowGet)

}