c# - sqldependency onchange 在 asp.net 中触发，但 asp.net 控件没有在其中刷新

Question

Sqldependencyonchangeasp.net成功触发，我可以获取更新的数据，Dataset但是当它绑定DataSet到Gridview它时，它不会刷新自身。

此外，asp.net事件触发时不会触发任何页面生命周期事件SqlDependency。

                                                                                           protected void dependency_OnChange(object sender, SqlNotificationEventArgs e)
    {
        SqlDependency dependency = (SqlDependency)sender;
        dependency.OnChange -= dependency_OnChange;

        UpdatePanel1.Update();
        connstr = "server=66.226.75.158\\SQLEXPRESS;database=sqldependencydb;User id= sqldependencyuser01;Password= yewtee#123";
        string ssql = "select EmployeeID,FirstName from dbo.EmployeeList";
        if (connection == null)
            connection = new SqlConnection(connstr);
        if (command == null)
            command = new SqlCommand(ssql, connection);

        if (myDataSet == null)
            myDataSet = new DataSet();
        myDataSet.Clear();
        command.Notification = null;
        Label1.Text = System.DateTime.Now.ToString();
        adapter = new SqlDataAdapter(command);
        adapter.Fill(myDataSet, "dbo.EmployeeList");
        GridView1.DataSource = myDataSet;
        GridView1.DataMember = "dbo.EmployeeList";
        GridView1.DataBind();



    }