[ACCEPTED]-Passing dynamic json object to C# MVC controller-asp.net-mvc-3

Accepted answer
Score: 17

Presumably the action that accepts input 4 is only used for this particular purpose 3 so you could just use the FormCollection object and then 2 all your json properties of your object 1 will be added to the string collection.

public JsonResult JsonAction(FormCollection collection)
    string id = collection["id"];
    return this.Json(null);
Score: 9

You can submit JSON and parse it as dynamic 10 if you use a wrapper like so:


var data = // Build an object, or null, or whatever you're sending back to the server here
var wrapper = { d: data }; // Wrap the object to work around MVC ModelBinder

C#, InputModel:

/// <summary>
/// The JsonDynamicValueProvider supports dynamic for all properties but not the
/// root InputModel.
/// Work around this with a dummy wrapper we can reuse across methods.
/// </summary>
public class JsonDynamicWrapper
    /// <summary>
    /// Dynamic json obj will be in d.
    /// Send to server like:
    /// { d: data }
    /// </summary>
    public dynamic d { get; set; }

C#, Controller 9 action:

public JsonResult Edit(JsonDynamicWrapper json)
    dynamic data = json.d; // Get the actual data out of the object

    // Do something with it

    return Json(null);

Annoying to add the wrapper on the 8 JS side, but simple and clean if you can 7 get past it.


You must also switch over to 6 Json.Net as the default JSON parser in order 5 for this to work; in MVC4 for whatever reason 4 they've replaced nearly everything with 3 Json.Net except Controller serialization 2 and deserialization.

It's not very difficult 1 - follow this article: http://www.dalsoft.co.uk/blog/index.php/2012/01/10/asp-net-mvc-3-improved-jsonvalueproviderfactory-using-json-net/

Score: 2

Another solution is to use a dynamic type 3 in your model. I've written a blog post 2 about how to bind to dynamic types using 1 a ValueProviderFactory http://www.dalsoft.co.uk/blog/index.php/2012/01/10/asp-net-mvc-3-improved-jsonvalueproviderfactory-using-json-net/

Score: 2

Much like the accepted answer of a FormCollection, dynamic 4 objects can also map to arbitrary JSON.

The 3 only caveat is that you need to cast each 2 property as the intended type, or MVC will 1 complain.

Ex, in TS/JS:

var model: any = {};
model.prop1 = "Something";
model.prop2 = "2";

$http.post("someapi/thing", model, [...])


public object Thing(dynamic input)
    string prop1 = input["prop1"];
    string prop2 = input["prop2"];

    int prop2asint = int.Parse(prop2);

    return true;

More Related questions