SignalR in Layout and partial page

Question

I want to use a SignalR hub in a layout and in a partial page. Here it is described to use hub.start and done functions.

So I have two script blocks in my html page where i want to use SignalR:

<script>
    $(document).ready(function () {
        window.hubReady = $.connection.hub.start();
        window.hubReady.done(function () {
            ...
        });
</script>

<script>
    $(document).ready(function(e) {
        window.hubReady.done(function() {
            ...
        });
    });
</script>

In the second script block it says that windows.hubReady.done can't be executed because it's undefined.

EDIT: block 2 is executed before block 1. But why?

Are the two ready functions in the same order as you posted them? — yan.kun, Feb 25 '13 at 11:21

Onkelborg · Answer 1 · 2013-02-25T11:50:34.827

2

My guess is that the second callback is executed before the first, and if that's the case then window.hubReady is null since it's the first callback that initializes window.hubReady.

I would suggest that you don't create a global reference to your hub and instead reference it directly, ie:

<script>
    $(document).ready(function(e) {
        $.connection.hub.connected(function() {
            ...
        });
    });
</script>

(If this doesn't work then I suspect your hub named "hub" isn't defined on the server, but that's a different issue)

edited Feb 25 '13 at 11:50

answered Feb 25 '13 at 11:23

Onkelborg

3,927
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the second callback is executed before the first. So line 1100 is executed before line 76. I don't understand why. – daniel Feb 25 '13 at 11:39
i think your guess is that the second callback is executed _BEFORE_ the first? – daniel Feb 25 '13 at 11:40
The lines are executed in order, however, the functions aren't necessarily executed in the order of the document since they are callbacks. It's jQuery that decides the order of execution. – Onkelborg Feb 25 '13 at 11:52
So i don't know the order what is bad. Is there something in SignalR to test if the hub is already started? – daniel Feb 25 '13 at 11:58
ok, new question on this problem: http://stackoverflow.com/questions/15066693/signalr-check-if-hub-already-started – daniel Feb 25 '13 at 12:12
Check the documentation, there are event's you can hook up directly to you hub – Onkelborg Feb 25 '13 at 12:46
can you be more explicit? connected is not a function by the way – daniel Feb 25 '13 at 13:15
You can attach events with standard jQuery-syntax: .bind("onStart", function(e) {}); – Onkelborg Feb 25 '13 at 15:24

score 0 · Answer 2 · answered Feb 25 '13 at 15:27

0

i solved the problem by not calling $(document).ready(function(e) but $(window).load(function() in my partial html. $(window).load(function() is called second then.

answered Feb 25 '13 at 15:27

daniel

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Just a warning: it's not very reliable, it may break in the future if something changes, ex. jQuery-internals, the order of your scripts etc. – Onkelborg Feb 26 '13 at 08:26

SignalR in Layout and partial page

2 Answers2