SQL Server Notifications - My OnChange does not fire

Question

I would like to make use of SQL Server notifications to capture insert events at my database within a winforms app. I am attempting to use the SQLDependency object. The MSDN articles make this seem pretty straight forward. So I have created a little example application to give it a try. The event only seems to fire as I enter my application the first time(MessageBox appears). Inserting data into the table does not raise the OnChange event it would seem. Can someone tell me what I'm missing? Thanks!

 public Main()
    {
        InitializeComponent();
        var check = EnoughPermission();
        SqlDependency.Stop(constr);
        SqlDependency.Start(constr);
        if(connection == null)
        {
            connection = new SqlConnection(constr);
        }
        if(command == null)
        {
            command = new SqlCommand("Select ID, ChatMessage FROM dbo.Chat",connection);
        }
        connection.Open();
        command.Notification = null;
        SqlDependency dependency = new SqlDependency(command);
        dependency.OnChange += new OnChangeEventHandler(dependency_OnChange);
        command.ExecuteReader();
    }





    private void dependency_OnChange(object sender, SqlNotificationEventArgs e)
    {
        MessageBox.Show("Change!");
    }

Answer 1

While I was working in the implementation of query notification, I got the exact problem. I checked all configurations, code pieces, and even TCP settings, but nothing helped. Then, I figured out the following query to run on database and it solved my problem. Maybe you can try it.

ALTER AUTHORIZATION ON DATABASE::[Your DB] TO sa;