signalr使用同一浏览器在同一页面上创建新的连接ID，默认情况下在c＃中刷新

Question

默认情况下，signaler集线器在每次页面加载时启动，并在同一浏览器上的同一页面刷新或c＃中的新选项卡上创建新的连接ID。

很抱歉，它不是信号器问题，但是在我的情况下，但是我需要如何更新信号器。

signalr在每个页面刷新时创建新的连接ID，并保留先前的连接ID。当收到任何更新时，它将向每个新的连接发送更新

但是我希望每个选项卡为一个浏览器提供1个连接，它不应在刷新或新选项卡上为同一浏览器创建新的连接ID。

我使用的代码：

1. JobHub.cs类

   public class JobHub : Hub
    {
       public static void Show()
          {
           IHubContext context =   GlobalHost.ConnectionManager.GetHubContext<JobHub>();
           context.Clients.All.displayStatus();
          }
     }
   

2. View.cshtml

    <script src="~/Scripts/jquery-1.10.2.min.js"></script>
    <script src="~/Scripts/jquery.signalR-2.2.1.min.js"></script>
    <script src="~/signalr/hubs" type="text/javascript"></script>
    <script type="text/javascript">
    var job = $.connection.jobHub;
    job.client.displayStatus = function () {
               alert("change notice");
               getData();
           };
   
    $.connection.hub.start().done(function () {
               //connection started
               alert("connection started");
               getData();
           });
   
    function getData() {
           var $tbl = $('#tblJobInfo');
           $.ajax({
               url: 'http://localhost:51737/api/values',
               type: 'GET',
               datatype: 'json',
               success: function (data) {
                   if (data.length > 0) {
                       $tbl.empty();
                       $tbl.append(' <tr><th>ID</th><th>Name</th><th>Last Executed Date</th><th>Status</th></tr>');
                       var rows = [];
                       for (var i = 0; i < data.length; i++) {
                           rows.push(' <tr><td>' + data[i].JobID + '</td><td>' + data[i].Name + '</td><td>' + data[i].LastExecutionDate.toString().substr(0,10) + '</td><td>' + data[i].Status + '</td></tr>');
                       }
                       $tbl.append(rows.join(''));
                   }
               }
           });
       }
   

3. Div

    <div>
    <table id="tblJobInfo" style="text-align:center;margin-left:10px"> </table></div>
   

4. [JobInfo.cs和JobInfoRepository.cs

   public class JobInfo
   {
       public int JobID { get; set; }
       public string Name { get; set; }
       public DateTime LastExecutionDate { get; set; }
       public string Status { get; set; }
   }
   public class JobInfoRepository
   {
   
       public IEnumerable<JobInfo> GetData()
       {
   
           using (var connection = new SqlConnection(ConfigurationManager.ConnectionStrings["MyConnection"].ConnectionString))
           {
               connection.Open();
               using (SqlCommand command = new SqlCommand(@"SELECT [JobID],[Name],[LastExecutionDate],[Status]
              FROM [dbo].[JobInfo]", connection))
               {
                   // Make sure the command object does not already have
                   // a notification object associated with it.
                   command.Notification = null;
   
                   SqlDependency dependency = new SqlDependency(command);
                   dependency.OnChange += new OnChangeEventHandler(dependency_OnChange);
   
                   if (connection.State == System.Data.ConnectionState.Closed)
                       connection.Open();
   
                   using (var reader = command.ExecuteReader())
                       return reader.Cast<IDataRecord>()
                           .Select(x => new JobInfo()
                           {
                               JobID = x.GetInt32(0),
                               Name = x.GetString(1),
                               LastExecutionDate = x.GetDateTime(2),
                               Status = x.GetString(3)
                           }).ToList();
   
   
   
               }
           }
       }
       private void dependency_OnChange(object sender, SqlNotificationEventArgs e)
       {
   
           //calling hub notification
           JobHub.Show();
   
       }
   }
   

5. API ValuesController.cs

   public class ValuesController : ApiController
   {
    JobInfoRepository objRepo = new JobInfoRepository();
   
    // GET api/values
    public IEnumerable<JobInfo> Get()
    {
       return objRepo.GetData();
    }
   }
   

   在刷新页面后，只要我得到DB的更新，它就会多次调用sql依赖项更改事件。请指导或帮助我，我该如何处理这种情况。感谢您的宝贵时间和精力。

Answer 1

您是否得到上述答案？