向SignalR中的特定用户发送值

Question

用户按下“使用SignalR”发送按钮后，我同时填写了4个文本框。 在一部分中，我正在将文本框值发送给所有用户，并且此操作有效。 但是，当我尝试将值发送给特定用户时，按下按钮后，所有文本框都为空。

这是起作用的代码，它向所有用户发送值：

这是集线器：

 public void Send(string loanType, string loanAmount, string interestRates, string payment)
    {
        User sender = GetUser(Context.User.Identity.Name);

        var username = sender.Name;
        IEnumerable<string> connectionIds = sender.ConnectionIds;

        //All connected clients.
        Clients.All.broadcastMessage(loanType, loanAmount, interestRates, payment);

    }

这是js：

  $('#sendmessage').click(function (e) {
            sendPayment();
            e.preventDefault();
        });


        function sendPayment() {
        var msgValue = $msgTxt.val();
        var loanType = $('#txtLoanType').val();
        var loanAmount = $('#txtLoanAmount').val();
        var interestRates = $('#txtInterestRates').val();
        var payment = $('#txtPayment').val();

        if (loanType !== null && loanType.length > 0 && loanAmount !== null && loanAmount.length > 0 && interestRates !== null && interestRates.length > 0
            && payment !== null && payment.length > 0) {

            if (viewModel.isInPrivateChat()) {
                $.connection.hub.start();
                chatHub.server.send(msgValue, viewModel.privateChatUser(), $('#txtLoanType option:selected').val(), $('#txtLoanAmount').val(), $('#txtInterestRates').val(), $('#txtPayment').val());


            }
            else {

                 // Call the Send method on the hub.
                chatHub.server.send($('#txtLoanType option:selected').val(), $('#txtLoanAmount').val(), $('#txtInterestRates').val(), $('#txtPayment').val());


            }
        }



     chatHub.client.broadcastMessage = function (loanType, loanAmount, interestRates, payment) {
            $('#txtLoanType').val(loanType);
            $('#txtLoanAmount').val(loanAmount);
            $('#txtInterestRates').val(interestRates);
            $('#txtPayment').val(payment);
    };

但是，当我尝试将值发送给特定用户时，它不起作用：由于我正在删除C＃代码，因此问题出在JS：

这是将文本框的值发送给特定用户的C＃方法：

 public void Send(string message, string to, string loanType, string loanAmount, string interestRates, string payment)
    {
        User receiver;
        if (Users.TryGetValue(to, out receiver))
        {

            User sender = GetUser(Context.User.Identity.Name);

            IEnumerable<string> allReceivers;
            lock (receiver.ConnectionIds)
            {
                lock (sender.ConnectionIds)
                {

                    allReceivers = receiver.ConnectionIds.Concat(sender.ConnectionIds);
                }
            }

            foreach (var cid in allReceivers)
            {
                Clients.Client(cid).broadcastMessage(new { message = message, isPrivate = true, loanType = loanType,
                    loanAmount = loanAmount,
                    interestRates = interestRates,
                    payment = payment
                });
            }
        }
    }

它将调用JS文件中的Private部分，即：

               if (viewModel.isInPrivateChat()) {
                $.connection.hub.start();
                chatHub.server.send(msgValue, viewModel.privateChatUser(), $('#txtLoanType option:selected').val(), $('#txtLoanAmount').val(), $('#txtInterestRates').val(), $('#txtPayment').val());

Answer 1

功能签名不匹配。 参数的数量不同，它们必须完全匹配，否则javascript函数将永远不会被调用，当您调用broadcastMessage函数时，您似乎正在尝试使用send函数的参数。

在要查找的用户的JavaScript中：

function (loanType, loanAmount, interestRates, payment)

但是您正在发送：

broadcastMessage(new { message = message, isPrivate = true, loanType = loanType,
                loanAmount = loanAmount,
                interestRates = interestRates,
                payment = payment
            })