Sending JSON string to ASP.NET Core MVC Controller

Question

I know how to send simple objects from JavaScript to an ASP.NET Core Controller. But what I'm suppose to do when I have complex a JSON string?

For example I'm using Factory lib. in JavaScript, so when I'm serializing my current Canvas data I'm getting JSON string like this:

The question is : should I create this complex model in my ASP.NET Core app or is there any other way to get this JSON string in my Controller?

Can I consume a simple json string in my Controller?

Answer 1

It's up to your needs actually.

If you do need a model which provides some methods to process the data, then creating a model could be a good idea.

If you just need to deserialize the JSON string and extract values, you could write your controller like

public ActionResult xxx ([FromBody]dynamic postData)

It will receive the request body as string now.

Be sure to set content-type as application/json in your javascript code

Answer 2

The original answer looks to use a dynamic object to handle the JSON string.

An alternative approach would be to capture the JSON string into a string.

public IActionResult xxx(string id, [FromBody] string jsonString)

And then de-serialize it.

MyData myData = new JavaScriptSerializer().Deserialize<MyData>(jsonString);