Save private chat in database using SignalR in ASP.Net MVC

var chatHub = $.connection.chatHub;
registerClientMethods(chatHub);
$.connection.hub.start().done(function () {
    var usrid = @ViewBag.userid;
    var Touserid=@ViewBag.Touserid;
    chatHub.server.connect(usrid, Touserid);
    loadEvents(objHub);
});

       function registerClientMethods(chatHub) {
           chatHub.client.sendPrivateMessage = function (windowId, fromUserName, message, userimg, CurrentDateTime) {
                var ctrId = 'private_' + windowId;
                if ($('#' + ctrId).length == 0) {

                    OpenPrivateChatBox(chatHub, windowId, ctrId, fromUserName, userimg);

                }

                var CurrUser = $('#hdUserName').val();
                var Side = 'right';
                var TimeSide = 'left';

                if (CurrUser == fromUserName) {
                    Side = 'left';
                    TimeSide = 'right';

                }
                else {
                    var Notification = 'New Message From ' + fromUserName;
                    IntervalVal = setInterval("ShowTitleAlert('SignalR Chat App', '" + Notification + "')", 800);

                    var msgcount = $('#' + ctrId).find('#MsgCountP').html();
                    msgcount++;
                    $('#' + ctrId).find('#MsgCountP').html(msgcount);
                    $('#' + ctrId).find('#MsgCountP').attr("title", msgcount + ' New Messages');
                }

                var divChatP = '<div class="direct-chat-msg ' + Side + '">' +
                    '<div class="direct-chat-info clearfix">' +
                    '<span class="direct-chat-name pull-' + Side + '">' + fromUserName + '</span>' +
                    '<span class="direct-chat-timestamp pull-' + TimeSide + '"">' + CurrentDateTime + '</span>' +
                    '</div>' +

                    ' <img class="direct-chat-img" src="' + userimg + '" alt="Message User Image">' +
                    ' <div class="direct-chat-text" >' + message + '</div> </div>';

                $('#' + ctrId).find('#divMessage').append(divChatP);

                // Apply Slim Scroll Bar in Private Chat Box
                var ScrollHeight = $('#' + ctrId).find('#divMessage')[0].scrollHeight;
                $('#' + ctrId).find('#divMessage').slimScroll({
                    height: ScrollHeight
                });
            }

        }

        public void Connect(int usrid, int Touserid)
        {

            //var id = TempData.Peek("ID");
            ////var id = 8;
            //int id1 = Convert.ToInt32(id.ToString());
            var connectionid = Context.ConnectionId;
            var connection = db.OnlineUsers.AsNoTracking().Where(o => o.UserID == usrid).FirstOrDefault();
            var connection1 = db.OnlineUsers.AsNoTracking().Where(o => o.UserID == Touserid).FirstOrDefault();
            // send to caller
            Clients.Caller.onConnected(connectionid, usrinfo.First_Name + " " + usrinfo.Last_Name, ConnectedUsers, CurrentMessage);

            // send to all except caller client
            Clients.AllExcept(connectionid).onNewUserConnected(connectionid, usrinfo.First_Name + " " + usrinfo.Last_Name, logintime);

        public void SendPrivateMessage(string toUserId, string message)
        {

            string fromUserId = Context.ConnectionId;

            var toUser = ConnectedUsers.FirstOrDefault(x => x.ConnectionID == toUserId);
            var fromUser = ConnectedUsers.FirstOrDefault(x => x.ConnectionID == fromUserId);

            if (toUser != null && fromUser != null)
            {
                string CurrentDateTime = DateTime.Now.ToString();
               // string UserImg = GetUserImage(fromUser.UserName);
                // send to 
                Clients.Client(toUserId).sendPrivateMessage(fromUserId, fromUser.UserName, message, CurrentDateTime);

                // send to caller user
                Clients.Caller.sendPrivateMessage(toUserId, fromUser.UserName, message, CurrentDateTime);
            }
        }