ado.net2.0中的缓存使用SqlDependency类

private void Form1_Load(object sender, EventArgs e)

        {

            SqlDependency.Start(connectionString);///启动监听数据表

            BindDataGridView();

        }

        private void BindDataGridView()

        {

            using (SqlConnection conn = new SqlConnection(connectionString))

            {

                using (SqlCommand cmd = new SqlCommand())

                {

                    cmd.Connection = conn;

                    cmd.CommandType = CommandType.Text;

                    cmd.CommandText = "SELECT [OrderID],[ProductID],[UnitPrice],[Quantity],[Discount]  FROM dbo.[Order Details]";

                    SqlDependency den = new SqlDependency(cmd, null, 10);//创建一个监听对象实例(cmd : 一定要写,null,是默认，10是设置的10秒）

                    den.OnChange += new OnChangeEventHandler(den_OnChange);///注册监听事件

                    ////上面两句一定要放到command对象后面，不要下面这个语句里

                    using (SqlDataAdapter adp = new SqlDataAdapter(cmd))

                    {

                        DataTable dt = new DataTable();

                        adp.Fill(dt);

                        this.dataGridView1.DataSource = dt;

                    }

                }

            }

        }

        void den_OnChange(object sender, SqlNotificationEventArgs e)

        {

             ////这个方法要异步执行。

            this.dataGridView1.Invoke(new MethodInvoker(delegate { BindDataGridView(); }));

        }

    }

ALTER  DATABASE  'databaseName'  SET  ENABLE_BROKER;
Select  DATABASEpRoPERTYEX('databaseName','IsBrokerEnabled');