adding new properties in expando object in foreach loop

Question

I have to add new properties in expando object in foreach loop but I am not able to see a way to do it. Here is the example:

var allProperties = new List { "Name", "Email", "Roles" }; allProperties.AddRange(metaDataModel.GetFormattedFolders());

dynamic expando = new ExpandoObject();
foreach (var s in allProperties)
{
    expando.s = string.Empty;
}

It consider 's' as a property instead of considering value of 's' as property name.

Thanks

What type of object is `expando`? – juan.facorro Apr 14 '14 at 09:58 — juan.facorro, Apr 14 '14 at 09:58
It is Dynamic: dynamic expando = new ExpandoObject(); – Azhar Kiani Apr 14 '14 at 10:06 — Azhar Kiani, Apr 14 '14 at 10:06

Damith · Accepted Answer · 2014-04-14T10:09:53.403

7

var expando = new ExpandoObject() as IDictionary<string, Object>;
foreach (var s in allProperties)
{
    expando.Add(s, string.Empty);
}

edited Apr 14 '14 at 10:09

answered Apr 14 '14 at 09:55

Damith

1

above does not work. It says:Cannot apply indexing with [] to an expression of type 'System.Dynamic.ExpandoObject' – Azhar Kiani Apr 14 '14 at 10:05
Thanks. It works. Not sure why we have to cast it into IDictionary object to acheive this? – Azhar Kiani Apr 14 '14 at 10:20
ExpandoObject is IDictionary underneath but you can't use indexing with`[]` or adding properties like we do with normal Collections. – Damith Apr 14 '14 at 10:27

1 Answers1