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当我想发送数据时遇到问题 o 在页面加载时从集线器启动子程序。生病放这个示例代码，因为很短

这是我的聊天.vb

 Imports System
 Imports System.Collections.Generic
 Imports System.Linq
 Imports System.Web
 Imports SignalR.Hubs

 Public Class Chat
    Inherits Hub
    Public Sub Send(message As String)
       ' Call the addMessage method on all clients
        Clients.addMessage(message)
    End Sub
 End Class

这是我的 default.aspx

 <script src="Scripts/jquery-1.6.4.min.js" type="text/javascript"></script>
 <script src="Scripts/jquery.signalR-0.5.3.js" type="text/javascript"></script>
 <script src="signalr/hubs" type="text/javascript"></script>
 <script language="javascript" type="text/javascript">
    $(function () {
        // Proxy created on the fly
        var chat = $.connection.chat;

        // Declare a function on the chat hub so the server can invoke it
        chat.addMessage = function (message) {
        $('#messages').append('<li>' + message + '</li>');
        };

        $("#broadcast").click(function () {
           // Call the chat method on the server
           chat.send($('#msg').val());
       }); 
       // Start the connection
       $.connection.hub.start();
    });
 </script>
 </head>
 <body>
   <form id="form1" runat="server">
   <div style="position: absolute; left: 0; top: 0; height: 100%; width: 100%">
     <input type="text" id="msg" />
     <input type="button" id="broadcast" value="broadcast" /> 
     <ul id="messages">
     </ul>
   </div> 
   </form>
 </body>

我不想按下按钮，我希望他在加载页面时自己做

当我这样说

    <script language="javascript" type="text/javascript">
      $(document).ready(function () {
        // Proxy created on the fly
        var chat = $.connection.chat;

        // Declare a function on the chat hub so the server can invoke it
        chat.addMessage = function (message) {
        $('#messages').append('<li>' + message + '</li>');
        }; 

       chat.send('Hello World');

       // Start the connection
       $.connection.hub.start();
    });
 </script>

我遇到连接问题我收到此错误“SignalR：必须在发送数据之前启动连接。在 .send() 之前调用 .start()”；

4

1 回答 1

0

您必须在发送之前调用 start。

所以：

chat.send('Hello World');

// Start the connection
$.connection.hub.start();

应该：

// Start the connection
$.connection.hub.start().done(function () {
    // Call the server side function AFTER the connection has been started
    chat.send('Hello World');
});

希望这可以帮助！

于 2012-08-30T23:24:11.743 回答