Question

156

SignalR invoke method: connection must be started before data can be sent

rated 0 times [ 162] [ 6] / answers: 1 / hits: 28044 / 11 Years ago, wed, july 3, 2013, 12:00:00

There are lots of 'connection must be started before data can be sent' issues in here and GitHub, but I hardly find hub related problems.

$(function () {

        // Declare a proxy to reference the hub. 

        var connection = $.hubConnection('http://www.website.net/');

        var chat = connection.createHubProxy('MyHub');



        // Start the connection.

        $.connection.hub.start().done(function () {

            console.log('Connect! connection Id=' + $.connection.hub.id);



            $('#sendmessage').click(function () {

                chat.invoke('method1','0000').done(function () {

                    console.log ('Invocation of method1 succeeded');

                }).fail(function (error) {

                    console.log('Invocation of method1 failed. Error: ' + error);

                });

            });

        })

        .fail(function(){ console.log('Could not Connect!'); });

    });

The above code gives to execute a method when user clicks the button.
I can check the method works with my WPF .NET app.

I can get Connection Id successfully, but when I click the button it says 'SignalR invoke method: connection must be started before data can be sent. Call .start() before .send()' error.

What did I wrong?

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cristinah

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3 Years ago

answered 11 Years ago devlin · Accepted Answer

Read tutorial carefully and it works now.

 $(function () {

        // Declare a proxy to reference the hub. 

        var connection = $.hubConnection('http://www.website.net/');

        var chat = connection.createHubProxy('MyHub');



        connection.start().done(function() {

            console.log('Now connected, connection ID=' + connection.id); 

            // Wire up Send button to call sendmessage on the server.

            $('#sendmessage').click(function () {

                chat.invoke('method1', '0000');

                });

            })

            .fail(function(){ console.log('Could not connect'); });;

    });