Question

我正在尝试为当前项目实现查询通知。我正在使用SqlNotificationEventArgs实施查询通知。当我直接在Ado.net命令中为查询内联SQL时，我能够使代码工作，但是，当我在存储过程中放入相同的查询通知时，查询通知似乎不会上班。它在事件args的e.Info参数中返回Public Sub GetCust(ByVal CustomerId As String) Dim oConn As SqlConnection Dim connectionString As string connectionString = GetConnectionString() SqlDependency.Stop(connectionString) SqlDependency.Start(connectionString) oConn = New SqlConnection(connectionString) 'This is the code for the stored procedure path 'Dim oCommand As New SqlCommand("SelectCustomerInfo", oConn) 'oCommand.CommandType = CommandType.StoredProcedure 'oCommand.Parameters.AddWithValue("@CustomerId", CustomerId) 'This is the code for using inline SQL Dim strSQL As String strSQL = "select [CustomerId],[name], [age],[gender],[favorite_food] from dbo.custpreferences where customerid = '" & CustomerId & "'" Dim oCommand As New SqlCommand(strSQL, oConn) oCommand.CommandType = CommandType.Text oCommand.Notification = Nothing Dim dep As SqlDependency = New SqlDependency(oCommand) AddHandler dep.OnChange, AddressOf cust_onchange oConn.Open() Dim dataAdapter As SqlDataAdapter = New SqlDataAdapter(oCommand) dataAdapter.Fill(dsCustomers) If (Not dataAdapter Is Nothing) Then dataAdapter.Dispose() If Not oConn Is Nothing Then oConn.Dispose() End Sub Private Sub cust_onchange(ByVal sender As System.Object, ByVal e As System.Data.SqlClient.SqlNotificationEventArgs) GetCustInfo(mCustomer.strCustomerID) Dim dep As SqlDependency = DirectCast(sender, SqlDependency) RemoveHandler dep.OnChange, AddressOf cust_onchange End Sub Query（8）的值。它还继续大火。每隔30秒以上。

SET ANSI_NULLS ON
GO
SET ANSI_PADDING ON 
GO
SET ANSI_WARNINGS ON 
GO
SET CONCAT_NULL_YIELDS_NULL ON 
GO
SET QUOTED_IDENTIFIER ON
GO 
SET NUMERIC_ROUNDABORT OFF
GO 
SET ARITHABORT ON
GO
SET QUOTED_IDENTIFIER ON
GO

CREATE PROCEDURE [dbo].[SelectCustInfo]
    @CustomerID VARCHAR(6)
AS 
    SELECT
        [CustomerId], [name], [age], [gender], [favorite_food] 
    FROM     
        dbo.CustInfo (NOLOCK)
     WHERE    
        (CustomerId = @CustomerID)

这是存储过程：

{{1}}

为什么这适用于内联SQL与使用存储过程的任何想法？

Answer 1

一旦我删除了与READ UNCOMMITED相同的NOLOCK提示，我就可以使用它。

Answer 2

与SqlDependency一起使用存储过程时

请勿使用

NOLOCK
设置NOCOUNT开

使用存储过程的SQL Server查询通知

2 个答案: