向SignalR中的特定用戶發送值

Question

用戶按下“使用SignalR”發送按鈕后，我同時填寫了4個文本框。 在一部分中，我正在將文本框值發送給所有用戶，並且此操作有效。 但是，當我嘗試將值發送給特定用戶時，按下按鈕后，所有文本框都為空。

這是起作用的代碼，它向所有用戶發送值：

這是集線器：

 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);

    }

這是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，當我嘗試將值發送給特定用戶時，它不起作用：由於我正在刪除C＃代碼，因此問題出在JS：

這是將文本框的值發送給特定用戶的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
                });
            }
        }
    }

它將調用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

功能簽名不匹配。 參數的數量不同，它們必須完全匹配，否則javascript函數將永遠不會被調用，當您調用broadcastMessage函數時，您似乎正在嘗試使用send函數的參數。

在要查找的用戶的JavaScript中：

function (loanType, loanAmount, interestRates, payment)

但是您正在發送：

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