CODEWITHSUNDEEP
c#dynamicreflectionpropertiesgettype
MVC Newbie
MVC Newbie

Reputation: 365

How to Add to an unknown List property of an object at runtime?

I have a 'Profile' object/class with an IList of 'Addresses', of which, I will only know their type [profile / addresses] at runtime via GetType() / GetProperties() etc., though I wish to .Add to this list e.g.: 

var profile = session.Get<ProfileRecord>(1);

dynamic obj = new ExpandoObject();
obj = profile;
obj["Addresses"].Add(addressNew);

This does not work due to:

Cannot apply indexing with [] to an expression of type 'Test.Models.ProfileRecord'.

I've been looking at IDictionary, but have been unsuccessful in my attempts, nor even know if I should be heading down that path - so what is the correct way to go about this? This entire concept is new to me, so please don't over assume my capabilites ;) Many thanks in advance.

Upvotes: 0

Views: 54

Answers (1)

Boot750
Boot750

Reputation: 891

You could do it like this if you dont know the type of profile.

var prop = profile.GetType().GetProperty("Addresses").GetValue(profile);
prop.GetType().GetMethod("Add").Invoke(prop, new object[] {1}); // Add the Value to the list

But then you must be sure the List is already initalized.

But i think you should be able to cast your object and set the Property directly like:

if(profile.GetType == typeof (ProfileRecord))
{
    var record = (ProfileRecord)profile;
    if (profile.Addresses == null)
    {
         profile.Addresses = new List<Address>();
    }

    prfile.Addresses.Add(addressNew);
}

Upvotes: 1

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