C# – RedirectToAction outside of Areas

asp.net-mvc-2asp.net-mvc-areasc

I've recently updated our MVC 2 project at work to use Areas however I'm having a little problem with the RedirectToAction method.

We still have some of our controllers etc outside of our Areas. These controllers include the Home controller etc.

How do I do a RedirectToAction from inside an Area to a controller outside of Areas.

I thought something like the following might work but doesn't:

return RedirectToAction("Index", "Home", new { area = "" });

return RedirectToAction("Index", "Home", new { area = null });

Best Answer

It seems that my origional solution:

return RedirectToAction("Index", "Home", new { area = "" });

does infact work.

I'm not sure how I was managing to make it not work before but it seems to be working as expected now.

Also worth noting that Visual Studio 2010 still tells me that Cannot resolve action 'Index' even though the code works fine.

Related Solutions

C# – Should ‘using’ directives be inside or outside the namespace

There is actually a (subtle) difference between the two. Imagine you have the following code in File1.cs:

// File1.cs
using System;
namespace Outer.Inner
{
    class Foo
    {
        static void Bar()
        {
            double d = Math.PI;
        }
    }
}

Now imagine that someone adds another file (File2.cs) to the project that looks like this:

// File2.cs
namespace Outer
{
    class Math
    {
    }
}

The compiler searches Outer before looking at those using directives outside the namespace, so it finds Outer.Math instead of System.Math. Unfortunately (or perhaps fortunately?), Outer.Math has no PI member, so File1 is now broken.

This changes if you put the using inside your namespace declaration, as follows:

// File1b.cs
namespace Outer.Inner
{
    using System;
    class Foo
    {
        static void Bar()
        {
            double d = Math.PI;
        }
    }
}

Now the compiler searches System before searching Outer, finds System.Math, and all is well.

Some would argue that Math might be a bad name for a user-defined class, since there's already one in System; the point here is just that there is a difference, and it affects the maintainability of your code.

It's also interesting to note what happens if Foo is in namespace Outer, rather than Outer.Inner. In that case, adding Outer.Math in File2 breaks File1 regardless of where the using goes. This implies that the compiler searches the innermost enclosing namespace before it looks at any using directive.

C# – RedirectToAction with parameter

You can pass the id as part of the routeValues parameter of the RedirectToAction() method.

return RedirectToAction("Action", new { id = 99 });

This will cause a redirect to Site/Controller/Action/99. No need for temp or any kind of view data.

Best Answer

Related Solutions

C# – Should ‘using’ directives be inside or outside the namespace

C# – RedirectToAction with parameter

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