在signalR首先任意的消息没有MESSAGEID？ [英] First arbitrary messages in signalR has no messageID?

问题描述

我写了这个简单的code这 - 当连接时，应产生

I wrote this simple code which --when connected , should yield

• 第一！


• 欢迎


• 3消息（定时器）

这是code：

int i = 0;
protected override Task OnConnected(IRequest request, string connectionId)
{

    //first message
    Connection.Send(connectionId, "FIRST !"); //first message

    //last messages
    Timer _timer = new Timer(RunMe, new    {con = connectionId, req = request}, 2000, 1000);    

    //second message
    return Connection.Send(connectionId, "Welcome!"); //second message


}

void RunMe(dynamic state)
{
    if (i < 3)
    {
        Connection.Send((string) state.con, "Loop " + i);
        i++;
    }
}

和这里的JS code（的document.ready 块中）：

and here the JS code ( inside document.ready block) :

...

connection.received(function (data)
        {

        $('#messages').append('<li><b>data received = </b>' + data +
                                  "<b>ConnectionId =</b> " + connection.id + 
                                  '<b>MessageId = </b>' + connection.messageId + '</li>');
    });

我得到所有响应。

但是，如果我preSS F5（刷新） - 这是典型的回答：

But if I press f5(refresh) -- these are the typical responses :

再次刷新，

看来，第一条消息的从不得到了 MESSAGEID ：

It seems that the first message never gets a messageID :

和后来的消息有时获取MESSAGEID和有时不行。

And later messages sometimes get messageID and sometimes not.

我心想，也许这是一个初始化速度的问题，所以我尝试这样的：

I thought to myself , maybe it's an initialization speed problems , so I tried this :

再次，回应是：

• 这是怎么回事？为什么第一个消息没有得到MESSAGEID？我该如何解决呢？

推荐答案

在SignalR 1.1，connection.messageId设置<一个href=\"https://github.com/SignalR/SignalR/blob/1.1.0/src/Microsoft.AspNet.SignalR.Client.JS/jquery.signalR.transports.common.js#L260\"相对=nofollow> 所有connection.received处理程序已经呼吁一批消息后。

In SignalR 1.1, connection.messageId is set after all of the connection.received handlers have been called for a batch of messages.

消息ID真的只是为了被SignalR内部使用，但在Si​​gnalR被称为connection.received处理程序之前2.0 connection.messageId将被设置。

Message IDs are really only meant to be used by SignalR internally, but in SignalR 2.0 connection.messageId will be set before the connection.received handlers are called.

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