How to update data using ajax in a database?

First of all, I am developing a project where I use a crud operations with .net core. But how should I do the update? First code; Function that opens the modal of the retrieved data. Data is being pulled successfully.
Second code; The area where the button is located in ajax. Code in the third field; I will update the ajax function. I don’t know how to use this. The code in the fourth field; The routing found in the index. The code in the fifth field; update controller area, which I haven’t been able to do yet.
Honestly, I’m pretty new to ajax. How do I do this?

function upNews(pid) {
    var table = $('#kt_datatable').DataTable();
    secilenDeger = table.data().filter(x => x.Id == pid)[0];
    $('#idd').val(secilenDeger.Id);
    $('#nm').val(secilenDeger.Name);
    $('#dsc').val(secilenDeger.Description);
    $('#grs').val(secilenDeger.DetayImage);
    $('#dt').val(secilenDeger.Data);


    $('#GexampleModalSizeLg').modal('show');
}

    <a href="javascript:"  class="btn btn-sm btn-clean btn-icon" onclick="upNews('+ data +')" title="Edit details">
                                <i class="la la-edit"></i>

function updateNews() {
    $.ajax({
        type: "POST",
        url:hst3,
        dataType: "json",
        data: {
            "table": {
                "name": $('#Name').val(),
            }
        },
    })
}

var hst3 = "@Url.Action("EditNews", "Haberler")";

        [HttpPost]
        public Task<JsonResult EditNews(News n)
        {
            var sonuc = _adminService.addnws(newss);
            return Task.FromResult(Json(sonuc));         
        }