CODEWITHSUNDEEP
c#jsonjson.net
Scottingham
Scottingham

Reputation: 946

NewtonSoft JsonConvert deserialize on dynamic object type

I have an abstract object Item that has several children: RadioItem, CheckItem, etc.

Each item stores its own properties in a serialized JSON string property.

I'm trying to make a static class that can take in an Item, instantiate a new item from the JSON string and return that.

Right now I have the code looking something like this:

public static Item GetFreshItem(Item dirtyItem)
{
    string itemProperties = dirtyItem.InitialItemSettingsJSON;

    if (dirtyItem is RadioItem)
    {
        return JsonConvert.DeserializeObject<RadioItem>(itemProperties);
    }

    if (dirtyItem is CheckItem)
    {
        return JsonConvert.DeserializeObject<CheckItem>(itemProperties);
    }
    return null;
}

Is there a way to not have a long list of If (x is Type) and use a more dynamic single return statement depending on the type that was passed in?

I was thinking it'd be something like this (which doesn't work)

JsonConvert.DeserializeObject<typeOf(dirtyItem)>(itemProperties);

Upvotes: 0

Views: 1074

Answers (2)

csharpwinphonexaml
csharpwinphonexaml

Reputation: 3683

You could also do:

public static T GetFreshItem<T>(T dirtyItem) where T:Item
{
    string itemProperties = dirtyItem.InitialItemSettingsJSON;
    return JsonConvert.DeserializeObject<T>(itemProperties);
}

This way you don't need a cast.

Upvotes: 0

Tim S.
Tim S.

Reputation: 56556

I think you're looking for the (string, Type) overload of the deserialize method.

string itemProperties = dirtyItem.InitialItemSettingsJSON;
return (Item)JsonConvert.DeserializeObject(itemProperties, dirtyItem.GetType());

Upvotes: 3

Related Questions