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POHow to flatten an ExpandoObject returned via JsonResult in asp.net mvc?
 

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  1. POHow to flatten an ExpandoObject returned via JsonResult in asp.net mvc?
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    <p>I really like the <code>ExpandoObject</code> while compiling a server-side dynamic object at runtime, but I am having trouble flattening this thing out during JSON serialization. First, I instantiate the object:</p> <pre><code>dynamic expando = new ExpandoObject(); var d = expando as IDictionary&lt;string, object&gt;; expando.Add("SomeProp", SomeValueOrClass); </code></pre> <p>So far so good. In my MVC controller, I want to then send this down as a JsonResult, so I do this:</p> <pre><code>return new JsonResult(expando); </code></pre> <p>This serializes the JSON into the below, to be consumed by the browser:</p> <pre><code>[{"Key":"SomeProp", "Value": SomeValueOrClass}] </code></pre> <p><b>BUT, what I'd really like is to see this:</b></p> <pre><code>{SomeProp: SomeValueOrClass} </code></pre> <p>I know I can achieve this if I use <code>dynamic</code> instead of <code>ExpandoObject</code> -- <code>JsonResult</code> is able to serialize the <code>dynamic</code> properties and values into a single object (with no Key or Value business), <i>but the reason I need to use <code>ExpandoObject</code> is because I don't know all of the properties I want on the object until runtime</i>, and as far as I know, I cannot dynamically add a property to a <code>dynamic</code> without using an <code>ExpandoObject</code>.</p> <p>I may have to sift through the "Key", "Value" business in my javascript, but I was hoping to figure this out prior to sending it to the client. Thanks for your help!</p>
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    1. COWhy not just use Dictionary<string, object> instead of ExpandoObject? It automatically serializes to the format you want, and you're only using your ExpandoObject like a dictionary anyway. If you want to serialize legitimate ExpandoObject's, using the "return new JsonResult(d.ToDictionary(x=>x.Key, x=>x.Value));" approach is probably the best compromise.
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