Webforms Response.Redirect() different behaviour for route and page

Question

• Webforms ASP.NET 4.61

I have the following route configuration in place:

aRoutes.MapPageRoute("routePageA", "page/a", "~/Pages/A.aspx");
aRoutes.MapPageRoute("routePageB", "page/b", "~/Pages/B.aspx");

I have code in a click handler for A.aspx that is redirecting to B.aspx however I get different behaviour as follows:

1. When redirecting to the route without ending request:

   Response.Redirect("/page/b");

the events fired are:

• A.aspx Page_Load() <-- Why? I am already in PostBack.

• B.aspx Page_Load()

  2. When redirecting to the route without ending request:

  Response.Redirect("/page/b, true");

the events fired are:

• A.aspx Page_Load() <-- Why? I am already in PostBack.

• B.aspx Page_Load()

  3. When redirecting to aspx directly:

  Response.Redirect("/Pages/B.aspx");

the events fired are:

• B.aspx Page_Load()

The behaviour I am expecting is 3. But why does this only behave this way when the ASPX is the redirection target. Can someone explain to me why directing to a route produces different behavior?

Answer 1

You can use RedirectToRoute instead of Response.Redirect(). Try this instead.

return RedirectToRoute("routePageB");