Only return a value via json - Receive it in my js ajax

[Jesper Petersen]

It is true that I need to have a single value over to my js ajax but when it is that I try to get my value over to ajax js. Then it informs me of this error

Object reference not set to an instance of an object.
​

I've been trying to figure out how to do it with json and I just haven't found any solution to it at all.

So where my PiinVoice lies there are also a lot of other values that I use.

Basically, it is only PiinVoice that I have to get out to my js ajax

Controller:

model.PiinVoice = subscription.LatestInvoice.PaymentIntent.ClientSecret;
return Json(model);

I have added this to my httppost:

[Produces("application/json")]

js file here:

$.ajax({
url: '/Members/AddMembership/' + Id + '/' + CompaniesId, //jump to httppost action,meet [Route("Members/AddMembership/{id}/{CompaniesId}")]
dataType: "json",
data: "",
type: "Post",
contentType: 'application/json',
success: function (result) {//receive response from httppost action
//result is the response of the httppost action,you can handle it
console.log("New: " + Id, CompaniesId);
console.log(result) //Object reference not set to an instance of an object.

},
error: function (xhr) {
console.log(xhr)
}
});

My question then goes on: How I get done so that my json can state the requirements in relation to Object reference not seen to an instance of an object.

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