How to call another controller Action From a controller in Mvc

Question

I need to call a controller B action FileUploadMsgView  from Controller A and need to pass a parameter for it    Code---its not going to the controller B s FileUploadMsgView        In ControllerA   private void Test                  try            some codes here             ViewBag FileUploadMsg    File uploaded successfully                ViewBag FileUploadFlag    2                RedirectToAction  B    FileUploadMsgView   new   FileUploadMsg    File   uploaded successfully                      In ControllerB receiving part   public ActionResult FileUploadMsgView string FileUploadMsg                 return View

User · Answer

I know it s old  but you can    Create a service layer Move method there Call method in both controllers

User · Answer

as  DLeh says Use rather  var controller   DependencyResolver Current GetService lt ControllerB gt       But  giving the controller  a controlller context is important especially when you need to access the User object  Server object  or the HttpContext inside  the  child  controller   I have added a line of code   controller ControllerContext   new ControllerContext Request RequestContext  controller     or else you could have used System Web to acces the current context too  to access Server or the early metioned objects   NB  i am targetting the framework version 4 6  Mvc5

User · Answer

This is exactly what I was looking for after finding that RedirectToAction   would not pass complex class objects     As an example  I want to call the IndexComparison method in the LifeCycleEffectsResults controller and pass it a complex class object named model   Here is the code that failed   return RedirectToAction  IndexComparison    LifeCycleEffectsResults   model     Worth noting is that Strings  integers  etc were surviving the trip to this controller method  but generic list objects were suffering from what was reminiscent of C memory leaks   As recommended above  here s the code I replaced it with   var controller   DependencyResolver Current GetService lt LifeCycleEffectsResultsController gt      var result   controller IndexComparison model   return result    All is working as intended now   Thank you for leading the way

User · Answer

If anyone is looking at how to do this in  net core I accomplished it by adding the controller in startup   services AddTransient lt MyControllerIwantToInject gt       Then Injecting it into the other controller   public class controllerBeingInjectedInto   ControllerBase       private readonly MyControllerIwantToInject  myControllerIwantToInject       public controllerBeingInjectedInto MyControllerIwantToInject myControllerIwantToInject            myControllerIwantToInject   myControllerIwantToInject            Then just call it like so  myControllerIwantToInject MyMethodINeed

User · Answer

As  mxmissile says in the comments to the accepted answer  you shouldn t new up the controller because it will be missing dependencies set up for IoC and won t have the HttpContext   Instead  you should get an instance of your controller like this   var controller   DependencyResolver Current GetService lt ControllerB gt     controller ControllerContext   new ControllerContext this Request RequestContext  controller

User · Answer

Dleh s answer is correct and explain how to get an instance of another controller without missing dependencies set up for IoC  However  we now need to call the method from this other controller  Full answer would be    var controller   DependencyResolver Current GetService lt ControllerB gt     controller ControllerContext   new ControllerContext this Request RequestContext  controller      Call your method ActionInvoker InvokeAction controller ControllerContext   MethodNameFromControllerB ToCall

User · Answer

Let the resolver automatically do that   Inside A controller   public class AController   ApiController       private readonly BController  bController       public AController      BController bController                 bController   bController             public httpMethod      var result     bController OtherMethodBController parameters

User · Answer

Controllers are just classes - new one up and call the action method just like you would any other class member   var result   new ControllerB   FileUploadMsgView  some string

User · Answer

if the problem is to call   you can call it using this method    yourController obj  new yourController     obj yourAction

User · Answer

Your sample looks like psuedo code  You need to return the result of RedirectToAction   return RedirectToAction  B                             FileUploadMsgView                           new   FileUploadMsg    File uploaded successfully

[c#] How to call another controller Action From a controller in Mvc

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