CODEWITHSUNDEEP
c#
Sebi
Sebi

Reputation: 3979

Is it possible to get Class attributes? C#

I have a class which is using generics. This class do some operation which need serialization. So the class which will be given to myClass must hold the attribute [Serializable()]. Is it possible to request a class which attributes it holds? In best case at design time.

    [Serializable()]
    public class clsSchnappschuss<T>
    {
      //Some operations which need serialization
    }

So if someone uses clsSchnappschuss he must give the DataType (T) and i want to request that T implements [Serializable()]. Is this possible?

regards

Upvotes: 1

Views: 147

Answers (2)

Sergey Kalinichenko
Sergey Kalinichenko

Reputation: 727027

You cannot request a presence of an attribute statically (i.e. at compile time), but inside the code your generic type you can examine T as if it were an actual type name. For example, you can request its typeof, and pull attributes from it:

public class clsSchnappschuss<T> {
    static clsSchnappschuss() {
        if (Attribute.GetCustomAttribute(typeof(T), typeof(SerializableAttribute)) == null) {
            throw new InvalidOperationException(typeof(T).FullName +" is not serializable.");
        }
    }
}

Note that I put the check in a static constructor. This would execute once before any other code that uses clsSchnappschuss<> for each particular type.

Upvotes: 4

matthias
matthias

Reputation: 111

if your given classes implement the ISerializeable interface you could to following:

public class clsSchnappschuss<T> where T : ISerializable

Upvotes: 0

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