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');