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?

user3003238 · Accepted Answer · 2018-06-09 14:00:16Z

3

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

answered Jun 9, 2018 at 14:00

user3003238

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3 Comments

Алексей Over a year ago

Thx for the reply, I'll try it. If I have an Index method in Home controller, should I write ajax function just like this? $.ajax({ url: '/Home/Index', type: 'POST', dataType: 'application/json; charset=utf-8', data: JSON.stringify(canvas), async: false });

user3003238 Over a year ago

you can check the api in jquery here api.jquery.com/jquery.ajax, and it should be contentType instead of dataType and charset. You could skip the JSON.stringify as well I guess

Алексей Over a year ago

ep, this works. Thanks a lot for your answer instead of downvoting.

TidyDev · Accepted Answer · 2021-06-19 05:35:28Z

0

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);

answered Jun 19, 2021 at 5:35

TidyDev

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