Access to Dynamic object properties by name

Question

I have created this dynamic object, and I want to access the properties by name:

dynamic obj = new ExpanadoObject();
obj.Name = "Reza";

What I want is

obj["Name"] = "Reza";

or

var name = obj["Name"];

How can I do that?

Answer 1

Check the definition of ExpandoObject:

public sealed class ExpandoObject : IDynamicMetaObjectProvider, 
IDictionary<string, object>, ICollection<KeyValuePair<string, object>>, 
IEnumerable<KeyValuePair<string, object>>, IEnumerable, INotifyPropertyChanged

As you can see, one of the interfaces implemented by the class is IDictionary<string, object>. Therefore, you could do this:

var dict = (IDictionary<string, object>)obj;
dict["Name"] = "Reza";
var name = dict["Name"] as string;

Note that if all you need is behavior where you access elements the dictionary-style, using ExpandoObject is not necessary; a plain Dictionary<string,object> would do just fine.