How do I iterate over the properties of an anonymous object in C#?

Posted by Tomas Lycken on Stack Overflow See other posts from Stack Overflow or by Tomas Lycken
Published on 2010-04-07T17:23:39Z Indexed on 2010/04/07 17:33 UTC
Read the original article Hit count: 561

Filed under:

anonymous-types

|

c#

|

properties

|

iteration

I want to take an anonymous object as argument to a method, and then iterate over its properties to add each property/value to a a dynamic ExpandoObject.

So what I need is to go from

new { Prop1 = "first value", Prop2 = SomeObjectInstance, Prop3 = 1234 }

to knowing names and values of each property, and being able to add them to the ExpandoObject.

How do I accomplish this?

Side note: This will be done in many of my unit tests (I'm using it to refactor away a lot of junk in the setup), so performance is to some extent relevant. I don't know enough about reflection to say for sure, but from what I've understood it's pretty performance heavy, so if it's possible I'd rather avoid it...

Follow-up question: As I said, I'm taking this anonymous object as an argument to a method. What datatype should I use in the method's signature? Will all properties be available if I use object?

© Stack Overflow or respective owner

Related posts about anonymous-types

Cannot iterate of a collection of Anonymous Types created from a LINQ Query in VB.NET

as seen on Stack Overflow - Search for 'Stack Overflow'
Ok everyone, I must be missing something here. Every LINQ example I have seen for VB.NET anonymous types claims I can do something like this: Dim Info As EnumerableRowCollection = pDataSet.Tables(0).AsEnumerable Dim Infos = From a In Info _ … >>> More
Declaring Anonymous Types in VB

as seen on Internet.com - Search for 'Internet.com'
Using an anonymous type in VB, which is essential for technologies like LINQ, means that the compiler will generate a class for you based on context and named initializers saving you time and effort. To learn more read on. >>> More
Sorting Anonymous Types

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a question of how to sort an anonymous type. Using Linq2SQL I have the following query, which returns a list of submissions: var submissions = EventSubmissions .Where(s => s.EventId.Equals(eventId)); Consider the following interface (somewhat simplyfied): public interface IQuerySorter { … >>> More
MVC using LINQ? - Can't return anonymous types

as seen on Stack Overflow - Search for 'Stack Overflow'
I'd like to implement MVC while using LINQ (specifically, LINQ-to-entities). The way I would do this is have the Controller generate (or call something which generates) the result-set using LINQ, then return that to the View to display the data. The problem is, if I do: return (from o in myTable… >>> More
C#/.NET Little Wonders: The Joy of Anonymous Types

as seen on Geeks with Blogs - Search for 'Geeks with Blogs'
Once again, in this series of posts I look at the parts of the .NET Framework that may seem trivial, but can help improve your code by making it easier to write and maintain. The index of all my past little wonders posts can be found here. In the .NET 3 Framework, Microsoft introduced the concept… >>> More

Related posts about c#

.NET WebRequest.PreAuthenticate not quite what it sounds like

as seen on West-Wind - Search for 'West-Wind'
I’ve run into the problem a few times now: How to pre-authenticate .NET WebRequest calls doing an HTTP call to the server – essentially send authentication credentials on the very first request instead of waiting for a server challenge first? At first glance this sound like it should be easy:… >>> More
HttpWebRequest and Ignoring SSL Certificate Errors

as seen on West-Wind - Search for 'West-Wind'
Man I can't believe this. I'm still mucking around with OFX servers and it drives me absolutely crazy how some these servers are just so unbelievably misconfigured. I've recently hit three different 3 major brokerages which fail HTTP validation with bad or corrupt certificates at least according to… >>> More
The dynamic Type in C# Simplifies COM Member Access from Visual FoxPro

as seen on West-Wind - Search for 'West-Wind'
I’ve written quite a bit about Visual FoxPro interoperating with .NET in the past both for ASP.NET interacting with Visual FoxPro COM objects as well as Visual FoxPro calling into .NET code via COM Interop. COM Interop with Visual FoxPro has a number of problems but one of them at least got a lot… >>> More
Dynamic Type to do away with Reflection

as seen on West-Wind - Search for 'West-Wind'
The dynamic type in C# 4.0 is a welcome addition to the language. One thing I’ve been doing a lot with it is to remove explicit Reflection code that’s often necessary when you ‘dynamically’ need to walk and object hierarchy. In the past I’ve had a number of ReflectionUtils that used string based expressions… >>> More
Finding a Relative Path in .NET

as seen on West-Wind - Search for 'West-Wind'
Here’s a nice and simple path utility that I’ve needed in a number of applications: I need to find a relative path based on a base path. So if I’m working in a folder called c:\temp\templates\ and I want to find a relative path for c:\temp\templates\subdir\test.txt I want to receive back subdir\test… >>> More