How to get data from the Client Side to the Server

Hello.

Developed an application in .NET CORE and the access page will pick up the geolocation of the client with the coordinates of Longitude and Latitude. However, I made this code using javascript, and the same will run on the client side, I made an implement to fill 2 Label with the information, but I am not able to send these to my server, my idea and store the location (With the knowledge of the client), but this is not working, I can not do that.

Below the javascript that I'm getting the location, and in the sequence as the label inside my html, I did not put it all but it's inside a form, I am.

Javascript

<script>
    var x = document.getElementById("lat");
    var y = document.getElementById("lot");

    function getLocation()
    {
        if (navigator.geolocation) {
            navigator.geolocation.getCurrentPosition(showPosition);
        } else { 

            y.innerHTML = "Geolocation is not supported by this browser.";
        }
    }

    function showPosition(position) {
        x.textContent = "Latitude: " + position.coords.latitude;
        y.innerHTML = "Longitude: " + position.coords.longitude;
        <%--Codigo para pegar as cordenadas e setar as mesmas nas Labels --%>
        $("#lblat").text("Latitude: " + position.coords.latitude);
        //$("#lblog").text("Longitude: " + position.coords.longitude);
        $("#lblog").text("Longitude: " +position.coords.longitude);
        $("#endereco").text("Longitude: " +position.coords.longitude);
    }


    $(document).ready(function carregar() {
        getLocation();
        showPosition();
    });
</script>

HTML

<div class="container">
    <div class="col">
        <div class="row">
            <hr />
            <asp:Label ID="Label1" runat="server" Text="Controle de Acesso "></asp:Label>
             <br />
            <asp:Label ID="lblat" runat="server" > </asp:Label>
            <br />
            <asp:Label ID="lblog" runat="server" Text=""> </asp:Label>
            <br />
            <asp:Label ID="lbIp" runat="server" Text=""></asp:Label>
            <br />
            <asp:Label ID="lbHost" runat="server" Text=""></asp:Label>
            <br />
             <asp:Label ID="Label3" runat="server" Text=""></asp:Label>
            <br />
             <asp:Label ID="lboutro" runat="server" Text=""></asp:Label>
            <hr />
            <br />
            <br />
             <asp:Label ID="lat" runat="server" Text=""></asp:Label>
               <br />
             <asp:Label ID="lot" runat="server" Text=""></asp:Label>
            <br />
        </div>
    </div>
</div>

Below a print of my application picking up the information, I want to get them to store in a database and use this to compare the client access places, and if I have some access in a different place, p>