Is it possible to add an attribute of Object with C#

Question

In JavaScript, I can create a new object (called clean). Then if I want to set an attribute of that object I just set objectName.attributeName = whatever. Is it possible to do something similar in C#, WITHOUT defining a class?

var clean = new Object();
clean.isClean = true;

`dynamic` https://msdn.microsoft.com/en-us/library/dd264741.aspx — Yuck, Mar 04 '15 at 20:50
And I'm voting to close because this really could have been found rather easily. — Yuck, Mar 04 '15 at 20:50

Matías Fidemraizer · Accepted Answer · 2015-03-04T20:58:30.500

3

Since .NET 4.0 yes, you can using ExpandoObject:

dynamic expando = new ExpandoObject();
expando.text = "hello world";

Anyway, if you're just looking to create objects on-the-fly, you should use an anonymous type declaration:

var obj = new { text = "hello world" };

Actually, expando objects have an added value: you can also add methods using delegates. For example:

dynamic expando = new ExpandoObject();
expando.DoIt = new Action
(
    () => 
    {
        // Code here
    }
);

expando.DoIt();

edited Mar 04 '15 at 20:58

answered Mar 04 '15 at 20:51

Matías Fidemraizer

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1

Do you have some documentation? I'm interested in learning about this `ExpandoObject`. – Sumner Evans Mar 04 '15 at 20:54
1

@jsve Maybe this article: http://blogs.msdn.com/b/csharpfaq/archive/2009/10/01/dynamic-in-c-4-0-introducing-the-expandoobject.aspx – Matías Fidemraizer Mar 04 '15 at 20:55
3

@jsve: Did you try *looking* for the documentation? Just a search for `ExpandoObject` finds it for me - and adding .net or msdn to the search finds it even more cleanly. – Jon Skeet Mar 04 '15 at 20:55
1

@JonSkeet In fact, this is what I did to give him an article :P – Matías Fidemraizer Mar 04 '15 at 20:56
@MatíasFidemraizer I find that links to documentation often lead to more informative posts, that is why I asked for it. – Sumner Evans Mar 04 '15 at 21:29
1

@jsve Check this http://tinyurl.com/ot7pw2v !! :D – Matías Fidemraizer Mar 04 '15 at 21:33
@MatíasFidemraizer I'm so glad you used this workaround. I, for one, found it funny. I've been reading a whole bunch of Meta posts about how people think that LMGTFY is offensive. I think it's plain funny. Thanks for "bypassing the system" :). – Sumner Evans Mar 27 '15 at 02:38
@jsve hahaha yeah it's very funny. I remember when someone gave me a link to this site a long time ago in IRC... :D – Matías Fidemraizer Mar 27 '15 at 06:06

Is it possible to add an attribute of Object with C#

1 Answers1