CODEWITHSUNDEEP
c#serializationbinary-serialization
siddharth
siddharth

Reputation: 159

Not marked as Serializable error

I have a class 'Entity'

[Serializable]
public class Entity
{
   public Guid Id { get; set; }
   public IEnumerable<Entity> ChildEntity { get; set; } 
}

I would notice that it has property ChildEntity which is a list of same class Entity.

Question1. Do I have to explicitly serialize this list ? Or Serializable attribute on the class will do that work for me.

Now when I try to Serialize this class using Binary Serializer I get exception saying this class is not marked as Serializable.

I think the exception occurs when it tries to serialize childEntities.

Here is my code for serializing. 

public static T DeepClone<T>(T obj)
{
    using (var ms = new MemoryStream())
    {
        var formatter = new BinaryFormatter();

        try
        {
            formatter.Serialize(ms, obj);
        }
        catch (Exception Ex)
        {
           //TODO
    }
    }
}

I also have a class from where the List of Entity Class is getting populated. 

[Serializable]
public class AllEntity
{
    public Guid ParentId {get; set; }
    public Guid Id {get; set;} //childId
    public string Desc {get; set;}
}

I am performing recursion to build the List of Entity class based on Parent Child Relationship. 

public IEnumerable<Entity> Build(IEnumerable<AllEntity> allentity)
{
    //recursivey builds List if Entity class
}

Exception Message:

Type 'System.LINQ.Enumerable+WhereSelectListIterator`2[[Common.Models.AllEntity, Common, Version=1.0.0.0, Culture=neutral, Token=null], [Common.Models.Entity, Common, Version=1.0.0.0, Culture=neutral, Token=null]' in Assembly 'System.Core, Version=4.0.0.0, Culture=neutral, Token=null' is not marked as Serializable

Upvotes: 4

Views: 4964

Answers (2)

dbc
dbc

Reputation: 116526

As indicated by the exception, your problem is that, in at least one Entity instance, the property IEnumerable<Entity> ChildEntity does not actually refer to a List<ChildEntity>, it refers to the unevaluated result of a .Where(). LINQ query.

Materialize it with ToList() before storage.

Upvotes: 5

Vijay Raheja
Vijay Raheja

Reputation: 290

I have checked with below code its working fine.

Entity ea = new Entity();
ea.Id = Guid.NewGuid();
var li = new List<Entity>();
li.Add(new Entity { Id = Guid.NewGuid() });
ea.ChildEntity = li;
DeepClone<Entity>(ea);

Just you need to mark class as [Serializable].

Upvotes: 0

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