CODEWITHSUNDEEP
.netc#-4.0dynamicexpandoobject
Amr Badawy
Amr Badawy

Reputation: 7673

How can I overload method with ExpandoObject?

I have the following expando object

 dynamic person = new ExpandoObject();
        person.FirstName = " FirstName ";
        person.SecondName = " FirstName ";
        person.FullName = person.FirstName + person.SecondName;
        person.BirthDate = new DateTime(1990, 1, 1);

        person.CalcAge = (Func<int>)
            (() => DateTime.Now.Year - person.BirthDate.Year);

I define CalcAge method to calculate age .. I want to add overloaded method that have a parameter like the below 

person.CalcAge = (Func<DateTime, int>)
            ((DateTime date) => date.Year - person.BirthDate.Year);

How can I implement it with ExpandoObject in which I can do the below ?

int age1 = person.CalcAge();
MessageBox.Show(age1.ToString());

int age2 = person.CalcAge2(new DateTime(1980, 1, 1));
MessageBox.Show(age2.ToString());

Upvotes: 0

Views: 284

Answers (1)

Jon Skeet
Jon Skeet

Reputation: 1500515

I don't believe you can. I'd strongly suggest you create a new named type instead. It looks like you know all the properties and methods you want to create - so just create a Person type. ExpandoObject is useful in some scenarios, but don't expect it to be able to cope with everything.

If you really want a dynamic object with this functionality, you'll need to derive a class from DynamicObject instead - that way you could implement overloading, if you wanted to (by intercepting method invocations).

Upvotes: 3

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