Initializing a list with type T of a complex type not working

[rogerfar]

When trying to execute the following code:

var test= new ComplexType();

var list = new List<ComplexType>();

ComplexType is just a class in this example.

it fails at the 2nd line with the message: Oops! The type could not be found. Only common type are registered by default. Make sure the type you are using is registered: https://github.com/zzzprojects/Eval-Expression.NET/wiki/EvalContext-Register-&-Unregister

[JonathanMagnan]

Hello @yesman85 ,

Did you register your ComplexType via RegisterType or RegisterAssembly` ? I tried some very basic scenario which seemed to work.

public class BaseType
{

}

public class ComplexType : BaseType
{
    public int ColumnInt { get; set; }
}

EvalManager.DefaultContext.RegisterType(typeof(ComplexType));

var item = Eval.Execute<ComplexType>("var test = new ComplexType();");
var list = Eval.Execute<List<ComplexType>>("var list = new List<ComplexType>();");

[rogerfar]

Yes, if I execute both lines in a single Execute it will break on the 2nd line, not the first one, indicating that the type is actually found.

[JonathanMagnan]

Strange, it seems to work on our side even in a single execute

Do you think you could try the following code?

public class BaseType
{

}

public class ComplexType : BaseType
{
    public int ColumnInt { get; set; }
}

EvalManager.DefaultContext.RegisterType(typeof(ComplexType));

var test = Eval.Execute(@"
var test= new ComplexType();
var list = new List<ComplexType>();
");

[rogerfar]

It works, BUT when I add: EvalManager.DefaultContext.RegisterDomainAssemblies(); it stopped working, even when I remove EvalManager.DefaultContext.RegisterType(typeof(ComplexType));.

I also noticed that my complex type is a partial class, maybe that's the culprit?

[JonathanMagnan]

Do you think you could provide a small example with this issue? By example in a new console application?

It will make easier on our side to fix it than trying to reproduce the problem.

It seems to work on partial class and with RegisterDomainAssemblies.

[rogerfar]

I tried it in a separate app but it worked then, but now I found out that it's not the complex type that's the issue but the List.

When I do var list = new System.Collections.Generic.List<ComplexType>(); it works, so there must be another assembly with the name List somewhere, although Visual Studio is not suggesting there is.

[JonathanMagnan]

Hello @yesman85 ,

Thank a lot,

We released the v2.4.2 which blacklist the class List when registering type via RegisterDomainAssemblies. A better solution will need to be found later.

Let me know if your expression can now work correctly.

Best Regards,

Jonathan

[rogerfar]

Yes it works good now! Thanks.