Convert jsonDynamic to contentitem extension

[giannik]

resolves #16233

[giannik]

@gvkries please review.

[gvkries]

I think it is beneficial to add support for a generic ToObject<T> functionality back to JsonDynamicObject and probably JsonDynamicValue as well. This was possible with Newtonsoft and would avoid having a specialized extension method just for ContentItem. It would also solve problems like #16221.

It would look like in this example:

@foreach (var foo in Model.ContentItem.Content.NamedBagPart.ContentItems)
{
    var contentItem = foo.ToObject<ContentItem>();
    ...
}

Note that this is actually possible right now, but only when using the JsonObject directly:

@foreach (var foo in Model.ContentItem.Content.NamedBagPart.ContentItems)
{
    var contentItem = ((JsonObject)foo).ToObject<ContentItem>();
    ...
}

We also have references to this style in the documentation, so we must fix it anyway IMHO.

OrchardCore/src/docs/reference/modules/Media/README.md

Line 456 in 7196b5b

var anchors = (Anchor[])Model.ContentItem.Content.Blog.Image.Anchors.ToObject<Anchor[]>();

It would just require something like public T? ToObject<T>() => _jsonObject.ToObject<T>(); in JsonDynamicObject and JsonDynamicValue, as there is an existing extension method for JsonNode.

[gvkries]

I guess JsonDynamicArray must be considered as well.

[giannik]

@gvkries feel free to make any changes.

[gvkries]

@gvkries feel free to make any changes.

I don't think I have access to your PR :) I will open another PR with a different approach.

[gvkries]

@giannik Please have a look at #16292...

[giannik]

closing in favor of #16292