c#的SqlDependency監聽器sql server

首先要啟用Service Broker

ALTER DATABASE 數據庫名稱 SET NEW_BROKER WITH ROLLBACK IMMEDIATE;
ALTER DATABASE 數據庫名稱 SET ENABLE_BROKER;

然后sql語句必須是依賴是基於某一張表的,而且查詢語句只能是簡單查詢語句,不能帶top或*,同時必須指定所有者,即類似[dbo].[]

 static void Main(string[] args)
        {
            SqlDependency.Start(connectionString);//傳入連接字符串,啟動基於數據庫的監聽
            UpdateGrid();
            Console.Read();
            SqlDependency.Stop(connectionString);
        }

static string connectionString = "Server=ADMIN-PC;Database=newsData;User Id=sa;Password=123456";
        private static void UpdateGrid()
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                connection.Open();
                using (SqlCommand command = new SqlCommand("SELECT id,cemskind FROM [dbo].[op_weight_cemskind]", connection))
                {
                    command.CommandType = CommandType.Text;
                    SqlDependency dependency = new SqlDependency(command);
                    dependency.OnChange += new OnChangeEventHandler(dependency_OnChange);
                    using (SqlDataReader sdr = command.ExecuteReader())
                    {
                        Console.WriteLine();
                        while (sdr.Read())
                        {
                            Console.WriteLine("ID:{0}\t數據:{1}\t", sdr["id"].ToString(), sdr["cemskind"].ToString());
                        }
                        sdr.Close();
                    }
                }
            }
        }
        private static void dependency_OnChange(object sender, SqlNotificationEventArgs e)
        {
            if (e.Type == SqlNotificationType.Change) //只有數據發生變化時,才重新獲取並數據
            {
                UpdateGrid();
            }
        }

監聽結果