Issue after upgrading to latest stable versions of EpiServer nuge

Issue after upgrading to latest stable versions of EpiServer nuget packages

Manish

Vote:

Hello,

After upgrading to all Episerver nuget packages to latest stable versions of CMS12, we are seeing a casting issue:

Message=Unable to cast object of type 'Microsoft.AspNetCore.Mvc.ModelBinding.Metadata.DisplayMetadata' to type 'EPiServer.Shell.ObjectEditing.ExtendedMetadata'.

Sample Code:

namespace KK.Opti.Common.Menu.Infrastructure.Attributes
{
public class PropertyListLinkAttribute : Attribute, IMenuModelMetadataAware
{
public Injected<IUrlResolver> UrlResolver { get; set; }
public Dictionary<string, string> LinkMappings { get; set; }

public virtual void OnMetadataCreated(DisplayMetadata metadata)
{
var extendedMetadata = (ExtendedMetadata)metadata;

var list = ((MenuItemProperty)extendedMetadata.Model).List;

}

Any help is appreciated.

#294612

Edited, Jan 13, 2023 0:31

Minesh Shah (Netcel)

Vote:

Shot in the dark here, try removing the interface and include the following using

    using Microsoft.AspNetCore.Mvc.ModelBinding.Metadata;

After some reading

"One thing that has been removed in MVC6 is the IMetadataAware interface. This allowed you to create your own subclasses of Attribute that could add data to the ModelMetadata structure to be used in an EditorTemplate or DisplayTemplate view."

See more info here : Reinstating IMetadataAware in ASP.NET 5 vNext MVC 6 (emikek.com)

#294614

Jan 13, 2023 1:51

Manish

Vote:

We are doing exactly how that link suggests. The code was working until we just updated EpiServer nuget pkgs to latest stable versions.

#294634

Jan 13, 2023 16:58