Why I Can't Update Gridview In Other Browser

Question

I want to update my gridview in other browser when i upload file in current browser..i use signalR to implement that.. here is my source code.. here is my NotificationHub.vb

Imports System.Web

Imports Microsoft.AspNet.SignalR

Namespace SignalRChat    

Public Class NotificationHub        

Inherits Hub        

Public Sub Send(name As String, message As String)

             ' Call the broadcastMessage method to update clients.             

Clients.All.broadcastMessage(name, message)         

End Sub     

End Class

End Namespace

Here is Startup.vb

Imports Microsoft.AspNet.SignalR

Imports Microsoft.Owin.Security

Imports Owin

Imports Microsoft.Owin  

'add the attribute here 

<Assembly: OwinStartup(GetType(SignalRTutorials.Startup))>    

Namespace SignalRTutorials     

Public Class Startup         

Public Sub Configuration(app As IAppBuilder)             

'app.MapSignalR()             

Dim hubConfiguration = New HubConfiguration()             

hubConfiguration.EnableDetailedErrors = True             

hubConfiguration.EnableJavaScriptProxies = True             

app.MapSignalR("/signalr", hubConfiguration)         

End Sub     

End Class End Namespace

in home.aspx

var NotificationHub = $.connection.NotificationHub;         

NotificationHub.client.refresh = function (stock) {               

//Just some tracing purposes             

//console.log('Refresh method triggered successfully!');             

//console.log(stock);              

//Refresh the gridview with latest data            

$("#Gridview1").each(function (i) {                 

if ($(<code></code>this)[0].id == stock.ID) {                     

//highlight the row that has data changed then slowly fade                     

$(this).attr('style', 'background-color: yellow;');                     

$(this).animate({ backgroundColor: 'white' }, 3000);                 

}             

});         

};           

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

//Just to trace whether your browser successfully connected to SignalR hub             

console.log('Connected to SignalR hub, connection ID = ' + $.connection.hub.id);         })

 

and the last in home.aspx.vb (i write this code after upload's code)

Dim context = GlobalHost.ConnectionManager.GetHubContext(Of NotificationHub)()

Dim aTimer = New System.Timers.Timer(1000)

aTimer.Interval = 3000

aTimer.Enabled = True

context.Clients.All.refresh()

i hope you can help me everyone.. thanks