Asp.Net mvc nested actions HTTPPOST - asp.net-mvc

Question

i ve got a weird problem. My view :
#{
ViewBag.Title = "Index";
}
<h2>Index</h2>
#using(Html.BeginForm())
{
<input type="submit" value="asds"/>
}
#Html.Action("Index2")
My Controller:
public class DefaultController : Controller
{
//
// GET: /Default1/
[HttpPost]
public ActionResult Index(string t)
{
return View();
}
public ActionResult Index()
{
return View();
}
//
// GET: /Default1/
[HttpPost]
public ActionResult Index2(string t)
{
return PartialView("Index");
}
[ChildActionOnly()]
public ActionResult Index2()
{
return PartialView();
}
}
When i click on a button [HttpPost]Index(string t) is executed, wich is fine. But after that [HttpPost]Index2(string t) is excuted and thats really weird to me because i ve posted data for Index action not for Index2. My logic tells me that [ChildActionOnly()]ActionResult Index2() instead of HttpPost one.
Why is this happening? How can override this behaviour without renaming [HttpPost]Index2 action?

Answer 1

That's the default behavior. It is by design. If you cannot change the POST Index2 action name you could write a custom action name selector that will force the usage of the GET Index2 action even if the current request is a POST request:
public class PreferGetChildActionForPostAttribute : ActionNameSelectorAttribute
{
public override bool IsValidName(ControllerContext controllerContext, string actionName, MethodInfo methodInfo)
{
if (string.Equals("post", controllerContext.HttpContext.Request.RequestType, StringComparison.OrdinalIgnoreCase))
{
if (methodInfo.CustomAttributes.Where(x => x.AttributeType == typeof(HttpPostAttribute)).Any())
{
return false;
}
}
return controllerContext.IsChildAction;
}
}
and then decorate your two actions with it:
[HttpPost]
[PreferGetChildActionForPost]
public ActionResult Index2(string t)
{
return PartialView("Index");
}
[ChildActionOnly]
[PreferGetChildActionForPost]
public ActionResult Index2()
{
return PartialView();
}