FromRoute only partially decodes certain values

[nikitagon]

The problem I’m having is that we have a code that looks like this:

[FromRoute(Name = "event_name")]
public string EventName
{
    get
    {                
        return _eventName;
    }

The following URL gets passed to it:
something.com/events/0008%20-%2012%2F3%2F2018Existe%20um%20inventario%20incompleto%2C%20deseja%20continar%20%3F%20(Sim)

• The encoded value passed through the URL is 0008%20-%2012%2F3%2F2018Existe%20um%20inventario%20incompleto%2C%20deseja%20continar%20%3F%20(Sim)
• FromRoute decodes EventName it to 0008 - 12%2F3%2F2018Existe um inventario incompleto, deseja continar ? (Sim)
• Expected decoded value of EventName would be 0008 - 12/3/2018Existe um inventario incompleto, deseja continar ? (Sim)

Is there a workaround for that?

<PackageReference Include="Microsoft.AspNetCore.Mvc" Version="2.0.0" />

#region Assembly Microsoft.AspNetCore.Mvc.Core, Version=2.1.3.0, Culture=neutral, PublicKeyToken=adb9793829ddae60
// .nuget\packages\microsoft.aspnetcore.mvc.core\2.1.3\lib\netstandard2.0\Microsoft.AspNetCore.Mvc.Core.dll
#endregion

[mkArtakMSFT]

Thanks for contacting us, @nikitagon.
@rynowak, can you please suggest what can be done here? Thanks!

[mkArtakMSFT]

@nikitagon, MVC does not do any decoding of passed route values. The underlying layer, however, does decode some of the values and that's why you see the value of the EventName partially decoded. However, slashes are not decoded as they have special meaning.
If you want to decode slashes in your route value, you'll need to do that manually.
We could consider adding an option for model binding to automatically decode slashes too, but we haven't heard enough customer feedback with this ask.