Object reference is required for the non-static field, method, or "notificationhub" property

Question

Object reference is required for the non-static field, method, or "notificationhub" property

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#1 by (3 votes)

2

Follow the code below:

void OnChange(object sender, SqlNotificationEventArgs e)
{
    //from here we will send notification message to client
    NotificationHub.SendNotification("João"); // <----- Aqui

    ....
}

Hub:

public void SendNotification(string who)
{
    string name = HttpContext.Current.User.Identity.Name;

    foreach (var connectionId in _connections.GetConnections(who))
    {
        Clients.Client(connectionId).addNotification(name + ": " + "message");
    }
}

Line error NotificationHub.SendNotification(Who); :

An object reference is required for the field, method, or property "NotificationHub.SendNotification (string)" not static

Any solution?

c#

asked by anonymous 02.06.2017 / 00:35

1 answer

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score 3 · Accepted Answer

Yes. Exactly what it says in the error message, it is necessary to create an instance of NotificationHub to call the SendNotification() method. This is because the method is non-static , that is, it can only be accessed by an instance of the class.

Depending on the case, you will need a specific instance, but I can not talk about it because there are no details in the question.

NotificationHub notHub = new NotificationHub();
notHub.SendNotification("João");