Why ViewContext.RouteData.Values["X"] return key vlaue ? while I expect just the value

Question

I expect in Razor the @ViewContext.RouteData.Values["id"] return an integer , While it return 'Id=X'.

for instance my controller like :

public ActionResult Index(int? id)
 {
     return View();
 }

And in Razor :

<input type="text" value='@ViewContext.RouteData.Values["id"]' id="routeDataId" />

the result is a Textbox with the value of 'Id=X'

Answer 1

I expect in Razor the @ViewContext.RouteData.Values["id"] return an integer , While it return Id=X.

Returning Id=X by RouteData.Values["id"] is correct behaviour, according to MSDN.

If you want to get a value of that object, you could use:

@ViewContext.RouteData.Values["id"].ToString()

So, your input should look like:

<input type="text" value='@ViewContext.RouteData.Values["id"].ToString()' id="routeDataId" />

If this also won't work, you could do that trick:

public ActionResult Index(int? id)
 {
     if(id.HasValue)
        TempData["id"] = id;
     else
        TempData["id"] = "empty value";

     return View();
 }

and then:

<input type="text" value='@TempData["id"]' id="routeDataId" />