CODEWITHSUNDEEP
c#asp.net-mvcasp.net-mvc-4
ShaneKm
ShaneKm

Reputation: 21328

ControllerDescriptor FindAction returns null

controller:

[HttpDelete]
public ActionResult Delete(int id)
{
}

method:

ControllerBase controllerToLinkTo = string.IsNullOrEmpty(controllerName)
                                        ? htmlHelper.ViewContext.Controller
                                        : GetControllerByName(htmlHelper, controllerName);

var controllerContext = new ControllerContext(htmlHelper.ViewContext.RequestContext, controllerToLinkTo);
var controllerDescriptor = new ReflectedControllerDescriptor(controllerToLinkTo.GetType());
ActionDescriptor actionDescriptor = controllerDescriptor.FindAction(controllerContext, actionName);

ActionDescriptor is null when an action has [Delete] attribute. Is there a way to get Action Name from controller context?

Upvotes: 8

Views: 2403

Answers (1)

Juan Carlos Velez
Juan Carlos Velez

Reputation: 2940

I had the same problem in .net 4.5, because the FindAction method only search the get attributes. I resolved the problem adding a second search with the GetCanonicalActions method.

ControllerBase controllerToLinkTo = string.IsNullOrEmpty(controllerName)
                                                        ? htmlHelper.ViewContext.Controller
                                                        : GetControllerByName(htmlHelper, controllerName);

var controllerContext = new ControllerContext(htmlHelper.ViewContext.RequestContext, controllerToLinkTo);
var controllerDescriptor = new ReflectedControllerDescriptor(controllerToLinkTo.GetType());
var actionDescriptor = controllerDescriptor.FindAction(controllerContext, actionName);

//add the following lines
if (actionDescriptor == null)
{
    actionDescriptor = controllerDescriptor.GetCanonicalActions().FirstOrDefault(a => a.ActionName == actionName);
}

Note: I use the linq method FirstOrDefault, so rember add using System.Linq;

Upvotes: 13

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