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ASP.NET MVC controller action with Interceptor pattern

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2 Oct 2012CPOL8 min read 67.6K   924   24  
This article is to demonstrate interceptor pattern with MVC controller action, and so action can be intercepted in controller classes without using action filters.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using MvcCallInterceptors.Controllers;

namespace MvcCallInterceptors.Interceptors
{
    public class ActionInterceptorAttribute : Attribute
    {
        InterceptionOrder _interceptionOrder;
        Type _interceptionForViewControllerType;
        string _viewName;
        string _actionName;
        bool _breakExecutionOnException;

        public ActionInterceptorAttribute(InterceptionOrder interceptionOrder, Type interceptionForViewControllerType, string actionName, bool breakExecutionOnException = true) :
            this(interceptionOrder, interceptionForViewControllerType, string.Empty, actionName, breakExecutionOnException)
        {
        }

        public ActionInterceptorAttribute(InterceptionOrder interceptionOrder, string viewName, string actionName, bool breakExecutionOnException = true) :
            this(interceptionOrder, null, viewName, actionName, breakExecutionOnException)
        {
        }

        public ActionInterceptorAttribute(string viewName, string actionName, bool breakExecutionOnException = true) :
            this(InterceptionOrder.After, null, viewName, actionName, breakExecutionOnException)
        {
        }

        public ActionInterceptorAttribute(Type interceptionForView, string actionName, bool breakExecutionOnException = true) :
            this(InterceptionOrder.After, interceptionForView, string.Empty, actionName, breakExecutionOnException)
        {
        }

        private ActionInterceptorAttribute(InterceptionOrder interceptionOrder, Type interceptionForViewControllerType, string viewName, string actionName, bool breakExecutionOnException)
        {
            if (string.IsNullOrWhiteSpace(actionName))
            {
                throw new ArgumentNullException("actionName");
            }
            if (interceptionForViewControllerType == null && string.IsNullOrWhiteSpace(viewName))
            {
                throw new Exception("Failed to initialize required parameters in ActionInterceptor decorator.");
            }
            if (interceptionForViewControllerType!=null && !interceptionForViewControllerType.IsSubclassOf(typeof(BaseMvcController)))
            {
                throw new Exception(string.Format("{0} is not valid for action interception.", interceptionForViewControllerType));
            }

            _interceptionOrder = interceptionOrder;
            _interceptionForViewControllerType = interceptionForViewControllerType;
            _viewName = viewName;
            _actionName = actionName;
            _breakExecutionOnException = breakExecutionOnException;
        }

        public InterceptionOrder InterceptionOrder
        {
            get { return _interceptionOrder; }
        }
        public Type InterceptionForViewControllerType
        {
            get { return _interceptionForViewControllerType; }
        }
        public string ViewName
        {
            get { return _viewName; }
        }
        public string ActionName
        {
            get { return _actionName; }
        }

        public bool BreakExecutionOnException
        {
            get { return _breakExecutionOnException; }
        }

    }
}

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License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


Written By
Technical Lead
India India
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