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

Answer 1

There's another option. Use Action Filters.

Create a new ActionFilterAttribute, apply it to your controller or a specific action (depending on your needs). This should suffice:

public class JsonRequestBehaviorAttribute : ActionFilterAttribute
{
    private JsonRequestBehavior Behavior { get; set; }

    public JsonRequestBehaviorAttribute()
    {
        Behavior = JsonRequestBehavior.AllowGet;
    }

    public override void OnResultExecuting(ResultExecutingContext filterContext)
    {
        var result = filterContext.Result as JsonResult;

        if (result != null)
        {
            result.JsonRequestBehavior = Behavior;
        }
    }
}

Then apply it like this:

[JsonRequestBehavior]
public class Upload2Controller : Controller