How to get google map user's Location from the database?

<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?sensor=false">script> <script type="text/javascript"> var markers = [ <asp:Repeater ID="rptMarkers" runat="server"> <ItemTemplate> { "title": '<%# Eval("Name") %>', "Type": '<%# Eval("Type") %>', "Location": '<%# Eval("Location") %>', "description": '<%# Eval("Description") %>' } ItemTemplate> <SeparatorTemplate> , SeparatorTemplate> asp:Repeater> ];         window.onload = function () { LoadMap(); }         function LoadMap() { var mapOptions = {                 center: new google.maps.LatLng(markers[0].lat, markers[0].lng),                 zoom: 8,                 mapTypeId: google.maps.MapTypeId.ROADMAP             }; var infoWindow = new google.maps.InfoWindow(); var latlngbounds = new google.maps.LatLngBounds(); var map = new google.maps.Map(document.getElementById("dvMap"), mapOptions); var legend = document.getElementById("legend");             legend.innerHTML = ""; for (var i = 0; i < markers.length; i++) { var data = markers[i] var myLatlng = new google.maps.LatLng(data.lat, data.lng); var marker = new google.maps.Marker({                     position: myLatlng, map: map,                     title: data.title,                     icon: data.icon                 }); (function (marker, data) {                     google.maps.event.addListener(marker, "click", function (e) {                         infoWindow.setContent("
" + data.description + "
");                         infoWindow.open(map, marker); }); })(marker, data);                 latlngbounds.extend(marker.position);                  legend.innerHTML += "
 " + marker.title + "
"; } var bounds = new google.maps.LatLngBounds(); map.setCenter(latlngbounds.getCenter()); map.fitBounds(latlngbounds); } script> <table border="0" cellpadding="0" cellspacing="0">   <div id="dvMap" style="width: 500px; height: 500px"> div> td> <td id="legend" style="display:none;"> td> <script async defer src="https://maps.googleapis.com/maps/api/js?key=AIzaSyAV8AiebjdcoS-Ratewz-HDkFt7XCq3zOM&libraries=places&callback=initMap">script> tr> table> body>

protected void Page_Load(object sender, EventArgs e) { if (!this.IsPostBack) { DataTable dt = this.GetData("select * from GetLocations");             rptMarkers.DataSource = dt;             rptMarkers.DataBind(); } }

private DataTable GetData(string query) { string conString = ConfigurationManager.ConnectionStrings["constr"].ConnectionString; SqlCommand cmd = new SqlCommand(query);         using (SqlConnection con = new SqlConnection(conString)) {             using (SqlDataAdapter sda = new SqlDataAdapter()) {                 cmd.Connection = con;                  sda.SelectCommand = cmd;                 using (DataTable dt = new DataTable()) {                     sda.Fill(dt); return dt; } } } }