Strange .NET Core Partial View loading issue using a built string

Question

A bit of background is that I'm trying to load a Navigation partial file per Sub Area that I'm in. Simple I originally thought...

Okay, so this works:

@await Html.PartialAsync("~/Areas/Admin/SubAreas/General/Views/Shared/_Navigation.cshtml")

And this does not work:

@if (ViewContext.RouteData.Values.ContainsKey("subarea"))
{
    // ViewContext.RouteData.Values["subarea"].ToString() comes out as "General"
    await Html.PartialAsync("~/Areas/Admin/SubAreas/" + ViewContext.RouteData.Values["subarea"].ToString() + "/Views/Shared/_Navigation.cshtml");
}

I've tried removing the if statement to see if that was something to do with it, nope. I've tried string formatting like:

await Html.PartialAsync(string.Format("~/Areas/Admin/SubAreas/{0}/Views/Shared/_Navigation.cshtml", ViewContext.RouteData.Values["subarea"].ToString()));

Still no banana - the string definitely comes out as "~/Areas/Admin/SubAreas/General/Views/Shared/_Navigation.cshtml", and if I try changing this to a path that's invalid then it throws an error, so it's definitely finding the View, but just refuses to display it.

I can't seem to find anything about this around the net, but may be searching for the wrong thing. Any ideas out there?!

Unbelievable, the View engine doesn't flag an error for that at all, but that's solved it! If you post that as an answer I'll accept it. — Chris Dixon
– Chris Dixon, Commented Jul 3, 2017 at 11:03

Lloyd · Accepted Answer · 2017-07-03 11:04:23Z

4

Try putting the @ back before the await partial.

I had issues with something like this last week and scratched my head for a while.

I think without the @ the view contents is kept code side and not marshalled back into the callers view.

edited Jul 3, 2017 at 11:04

answered Jul 3, 2017 at 11:03

Lloyd

29.7k5 gold badges89 silver badges100 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Chris Dixon Over a year ago

When the timer is up I'll accept this. Thanks again, just hope it helps others!

Jingo · Accepted Answer · 2023-10-11 16:58:53Z

0

Lloyd's answer above was the fix I needed (thank you!), but another idiosyncrasy revealed itself to me as I was implementing it. Wrapping the code too closely in HTML caused the same issue.

<div>@{@await PartialAsync("View");}</div>

Failed to render the view, however I was able to simply by breaking it up as so

<div>
   @{@await PartialAsync("View");}
</div>

I'm not sure why this happens, I haven't looked much into that part of it yet, but I thought this was worth sharing in the same topic, since it's a different instance of the same issue with a different fix.

answered Oct 11, 2023 at 16:58

Jingo

213 bronze badges

Collectives™ on Stack Overflow

Strange .NET Core Partial View loading issue using a built string

2 Answers 2

1 Comment

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Related