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c#dynamicjson.netjson-deserialization
Robert Oschler
Robert Oschler

Reputation: 14385

Deserialized JSON object to dynamic type but getting RuntimeBinderException accessing properties?

I am using JSON.net in a C# Windows Form application to deserialize a JSON string to a dynamic object:

dynamic jsonObj = JsonConvert.DeserializeObject(strJson);

I'm using the following test JSON for testing:

{"payload":"thePayload","number":3,"dialogResult":"one"}

When I run the code, I can indeed access the properties of the dynamic object using an associative array approach:

var x = jsonObj["payload"];

However, if I try to access the content using property names:

var x = jsonObj.payload;

It works but I get the following Exception:

A first chance exception of type 'Microsoft.CSharp.RuntimeBinder.RuntimeBinderException' occurred in Microsoft.CSharp.dll

Is there a way to change things so I can access the deserialized content in the dynamic object using property names instead of as an associative array, without getting the exception?

I found this SO post on RutimeBinderExceptions:

Accessing properties of anonymous/dynamic types across dll boundaries gives RuntimeBinderException

But I'd prefer not to use the ExpandoObject type and I'm not even sure if it applies to my situation.

UPDATE: Ok, I believe I am having the problem of depicted in the reference SO post above. The context of the call is a callback from the CefSharp browser user control when Javascript calls back into my C# app.

Upvotes: 2

Views: 1426

Answers (1)

Daniel Randall
Daniel Randall

Reputation: 371

Try working without the dynamic data type:

Dictionary<string, object> theData= new JavaScriptSerializer().Deserialize<Dictionary<string, object>>(jsonString);

string payload = (string)theData["payload"];
int number = (int)theData["number"];
string dialogResult = (string)theData["dialogResult"];

The call to Deserialize() creates a tree of Dictionary that you can traverse at will.

Upvotes: 3

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