Send Json object parameter to Web Api controller in .netCore

Question

This is Google API - Javascript code

var output = new Object();
output.PlaceID = place.place_id;
output.Longitude = place.geometry.location.lng();
output.Latitude = place.geometry.location.lat();

$.ajax({
    headers: {
        'Accept': 'application/json',
        'Content-Type': 'application/json'
    },
    url: 'api/StorePlaces/Get',
    type: 'POST',
    data: { "value":output },
    success: function (result) {
        // Do something with the result
    }
});

How to receive at the controller

    // GET api/values/5
    [HttpPost("{PlaceDetails}")]
    public string Get(PlaceDetails value)
    {
        return "value";
    }

In this case I get null value

I was unable to send the string , if I can send the Object as such, it is better.

This can be used as receiving object

public class PlaceDetails
{
    public string PlaceID { get; set; }
    public string Longitude { get; set; }
    public string Latitude { get; set; }
}

Answer 1

There are multiple things wrong with your code, maybe consult a few beginner tutorials first?

First, you have to look at the object your are sending, it's very obvious!

You are sending

{
    "value" : {
        "PlaceID" : "",
        "Longitude " : "",
        "Latitude " : ""
    }
}

Where the expected answer is

{
    "PlaceID" : "",
    "Longitude " : "",
    "Latitude " : ""
}

So you have to use this in JavaScript:

$.ajax({
    headers: {
        'Accept': 'application/json',
        'Content-Type': 'application/json'
    },
    url: 'api/StorePlaces/Get',
    type: 'POST',
    // do not wrap it in object with value property here!!!!
    data: JSON.stringify(output),
    success: function (result) {
        // Do something with the result
    }
});

Second, your Controller action (why the hell is it called Get when it's a post request?)... the [HttPost("{PlaceDetails}")] attribute is plain wrong.

This would expect a PlaceDetails parameter in the route. You don't such one! Just remove it. Also, the [FromBody] attribute is missing to tell it to deserialize the model from the http request body

[HttpPost]
public string Get([FromBody]PlaceDetails value)
{
    return "value";
}