JS Client doesn't invoke Method on SignalR Hub

Question

I have a MVC project which has 2 button and 6 textbox. I want to call different methods on a Hub.

Client :

$(document).ready(function () { var bitcoinHub = $.connection.bitcoinHub; $("#btnBuy").click(function () { var tl = document.getElementById("bitcoinBuy").value; var btc = document.getElementById("aBitcoin").value; var total = document.getElementById("aTotal").value; bitcoinHub.server.trade("buy",@Model.user,tl,btc,total); }); bitcoinHub.client.broadcastSell = function (model) { // $("#sellGrid").append("<li>"+model.Sell+"</li>"); }; $("#btnSell").click(function () { var tl = document.getElementById("bitcoinSell").value; var btc = document.getElementById("sBitcoin").value; var total = document.getElementById("sTotal").value; bitcoinHub.server.trade("sell",@Model.user,tl,btc,total); }); bitcoinHub.client.broadcastPurchase = function (model) { // $("#buyGrid").append("<li>"+model.Buy+"</li>"); }; $.connection.hub.start(); });

In the case I press "btnBuy" or "btnCell" it should invoke the trade methode on the server with different parameters.

Server:

BitcoinHub(name) Class Method

 public void trade(string parametre, Users cUser, string tl, string btc, string total) { switch (parametre) { case "sell": // Do something not important here break; case "buy": // Do something not important here break; } }

In the case I press "btnBuy" or "btnCell" it goes trough the clickeventhandler. The problem is that the method on the hub will not be called.

I not understand our last section. Can you rewrite it that it is clearer? — Stephu
– Stephu, Commented Nov 17, 2017 at 6:33
i have a mvc form. it has 2 button and 3 textbox for each button. when i press first button it will take 3 textbox' values and send to server side trade method and it will work for insert a data to database. İssue : When i press a button. Js's .click events are working together both them. When i work with breakpoint code invokes first .click code block and jumping to other button's .click function. Other İssue : but after this server side's trade method doesn't invoke. — Kadir Kalkan
– Kadir Kalkan, Commented Nov 17, 2017 at 8:08
Other point: Are your shure that the connection is started? I would move the core where you subscribe click events to the $.connection.hub.start().done(function(){<--add here-->}); }); — Stephu
– Stephu, Commented Nov 17, 2017 at 8:24
i am trying now but i really don't know about SignalR syntax could you fix from github if you have time ? github.com/kadirkalkan/PragmaLinq — Kadir Kalkan
– Kadir Kalkan, Commented Nov 17, 2017 at 8:51

Stephu · Accepted Answer · 2017-11-17 15:30:15Z

You can't use the model in JS like that @Model.user. See Accessing MVC's model property from Javascript for details

Additional rearrange your code. Do not invoke a method on server until connection is established:

$(document).ready(function () { var bitcoinHub = $.connection.bitcoinHub; bitcoinHub.client.broadcastSell = function (model) { // $("#sellGrid").append("<li>"+model.Sell+"</li>"); }; bitcoinHub.client.broadcastPurchase = function (model) { // $("#buyGrid").append("<li>"+model.Buy+"</li>"); }; $.connection.hub.start().done(function(){ // DO not call methods on server until connection is established. $("#btnBuy").click(function () { var tl = document.getElementById("bitcoinBuy").value; var btc = document.getElementById("aBitcoin").value; var total = document.getElementById("aTotal").value; bitcoinHub.server.trade("buy",@Model.user,tl,btc,total); }); $("#btnSell").click(function () { var tl = document.getElementById("bitcoinSell").value; var btc = document.getElementById("sBitcoin").value; var total = document.getElementById("sTotal").value; bitcoinHub.server.trade("sell",@Model.user,tl,btc,total); }); }); });

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