"Cannot redirect after HTTP headers have been sent" when doing RedirectToAction()

Question

So my question is a little different than the others. For others, they were using the Response.Redirect( url ); directly and so the fixes are just wrapping around it.

However, I have something like the following inside the same controller:

public ActionResult Index()
{
  // some other logic running inside this function...

  return RedirectToAction( "Result" );
}

public ActionResult Result()
{
   // Expecting calls being sent from Index

  return View ("done");
}

So I am not really calling Response.Redirect() directly, but RedirectToAction() probably calls Response.Redirect() eventually. In this case, what can I do?

These are the stack trace:

SYSTEM EXCEPTION:
- Message: Cannot redirect after HTTP headers have been sent.
- Source: System.Web

- Stack Trace:
   at System.Web.HttpResponse.Redirect(String url, Boolean endResponse, Boolean permanent)
   at System.Web.HttpResponseWrapper.Redirect(String url, Boolean endResponse)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult)
   at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass21.<BeginInvokeAction>b__1e(IAsyncResult asyncResult)

Seems pretty straight-forward to me. Somewhere before the redirect, you're modifying HTTP headers. However, given that you've redacted that code, who knows what's going on. — Chris Pratt, Nov 10 '16 at 16:50
Possible duplicate of [Why do I get "Cannot redirect after HTTP headers have been sent" when I call Response.Redirect()?](http://stackoverflow.com/questions/159523/why-do-i-get-cannot-redirect-after-http-headers-have-been-sent-when-i-call-res) — Michael Freidgeim, Mar 22 '17 at 06:30

score 1 · Accepted Answer · answered Nov 10 '16 at 23:37

1

Call Response.Headers.Clear() before RedirectToAction

answered Nov 10 '16 at 23:37

Yazan Ati

351
1
2

Redirect to Action to another Controller: `RedirectToAction("Logout", "Authentication");` – Kiquenet Mar 18 '19 at 08:51

"Cannot redirect after HTTP headers have been sent" when doing RedirectToAction()

1 Answers1