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POAccess fields of a Struct in an Object with Reflection
 

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    <p>I'm trying to use reflection (ultimately on unknown at compile time) <code>object</code> which include <code>struct</code>. I've got as far as <code>TypedReference.MakeTypedReference</code> but I've hit a wall.</p> <p>Here's my Class and Struct</p> <pre><code>public class MyObject { public int Id; public Money Amount; } public struct Money { public int Vaule; public string Code; } </code></pre> <p>And here is how I am trying to set "Code" of "Amount" in MyObject using reflection. As I mention above, I'm looking for a solution which does not know about these types at compile time (that would be too easy!)</p> <p>Here's the code I have so far (I've used [0], [1] to make the code simpler)</p> <pre><code>var obj = new MyObject() { Id = 1 }; obj.Amount.Vaule = 10; obj.Amount.Code = "ABC"; FieldInfo[] objFields = obj.GetType().GetFields(); FieldInfo[] moneyFields = objFields[1].GetValue(obj).GetType().GetFields(); List&lt;FieldInfo&gt; fields = new List&lt;FieldInfo&gt;() { objFields[1] }; fields.AddRange( moneyFields ); TypedReference typeRef = TypedReference.MakeTypedReference( objFields[1].GetValue( obj ), fields.ToArray() ); moneyFields[1].SetValueDirect( typeRef, "XXX" ); </code></pre> <p>The TypedReference.MakeTypedReference blows up with; "FieldInfo does not match the target Type." Likewise if I just pass <code>objFields[1]</code>. And if pass just <code>moneyFields</code> I get "TypedReferences cannot be redefined as primitives."</p> <p><strong>Why?</strong> Let's say I'm creating Random test fixtures and want to populate class fields with random data :)</p>
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    1. USIan Quigley
    1. USIan Quigley
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    1. COAre you saying that at compile time you don't know if its using MyObject or Money, so it needs to detect which object is being used and read/write the property accordingly?
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      1. USseries0ne
    2. COHow about using AutoFixture and getting out of the reflection Rube Goldberg machines business? (Though wrt `struct`, see http://stackoverflow.com/questions/12930963/creating-a-struct-with-autofixture-throws-no-public-constructor-error) (have not run into any need for `MakeTypedReference` professionally and have to say something as I happened to actually be watching the tweet stream for once, sry!)
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      1. USRuben Bartelink
    3. CO@RubenBartelink - the "why" was simply for reference. Would defo' use AutoFixture if that was what I was doing.
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      1. USIan Quigley
 

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