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POExecuteCore() method in ASP.NET MVC
 

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    <p>I am trying to understand how a controller and actions are invoked in mvc. After a lot of reading, I found out that the ExecuteCore() method gets executed, which is present inside the Controller.cs class.</p> <pre><code>protected override void ExecuteCore() { // If code in this method needs to be updated, please also check the BeginExecuteCore() and // EndExecuteCore() methods of AsyncController to see if that code also must be updated. PossiblyLoadTempData(); try { string actionName = RouteData.GetRequiredString("action"); if (!ActionInvoker.InvokeAction(ControllerContext, actionName)) { HandleUnknownAction(actionName); } } finally { PossiblySaveTempData(); } } public IActionInvoker ActionInvoker { get { if (_actionInvoker == null) { _actionInvoker = CreateActionInvoker(); } return _actionInvoker; } set { _actionInvoker = value; } } protected virtual IActionInvoker CreateActionInvoker() { // Controller supports asynchronous operations by default. return Resolver.GetService&lt;IAsyncActionInvoker&gt;() ?? Resolver.GetService&lt;IActionInvoker&gt;() ?? new AsyncControllerActionInvoker(); } </code></pre> <p>When ExecuteCore() starts executing, the reference to ActionInvoker property returns it a type of IActionInvoker. </p> <p>The IActionInvoker, is implemented by AsyncControllerActionInvoker.cs class which has the InvokeAction(ControllerContext, actionName) method implemented in it. </p> <p>So my question is :</p> <ol> <li>How the IActionInvoker interface is instantiated over here, and returned by ActionInvoker property ?</li> <li>Does the reference to the property returns an object of AsyncControllerActionInvoker class, so that we can use that object to make a call to InvokeAction(ControllerContext, actionName) method.</li> <li>What the does <code>Resolver.GetService&lt;IAsyncActionInvoker&gt;()</code> and <code>Resolver.GetService&lt;IActionInvoker&gt;()</code> do ?</li> </ol> <p>Please help me in understanding this.</p>
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