c# - SqlDependency 不会触发 OnChange 事件

Question

编辑:我修复了它。我所做的是将数据库的所有者更改为与我用来连接它的用户不同的东西。检查数据库所有者:

select name, suser_sname(owner_sid) from sys.databases

更改所有者:

ALTER AUTHORIZATION ON DATABASE::ISS TO sa;

差不多就是这样，我仍然不知道这样做的原因，但它确实有效，太棒了。 (也许以前的 dbowner 缺少一些权利？)

这让我头疼了太久，我完全不知道为什么会这样。长话短说，我从以下位置获取了 Mark Nischalke 的项目:http://www.codeproject.com/Articles/12335/Using-SqlDependency-for-data-change-events .该项目有一个 SQL 脚本来创建数据库，并且 SqlDependecy 在他的项目/数据库上触发。现在我知道我以前的数据库有问题，我复制了他的脚本并创建了我自己的数据库。除了表格(很明显)之外，一切都是相同的。这意味着我的 SqlDependency 应该可以工作，因为我有一个与另一个工作的数据库相同配置的数据库；但是不......它不起作用。此时，在我的 项目中，我更改了 SqlDependecy 以检查他的 数据库的通知并且它有效，所以这不是我项目中的 .NET 问题。然后我尝试让 他的 项目中的 SqlDependency 检查 我的 数据库，不，仍然不起作用。在这两种情况下，我都使用相同的连接字符串、集成安全性但不同的初始目录。感谢您的帮助。

(另请注意，MessageQueue 是在我的数据库上创建的，并在我关闭项目 SqlDependecy.Stop 但事件未触发时删除)

这是他的数据库创建脚本

USE [master]
GO
/****** Object:  Database [Chatter]    Script Date: 11/18/2005 13:55:20 ******/
CREATE DATABASE [Chatter] ON  PRIMARY 
( NAME = N'Chatter', FILENAME = N'D:\Microsoft SQL Server\MSSQL.1\MSSQL\DATA\Chatter.mdf' , SIZE = 5120KB , MAXSIZE = UNLIMITED, FILEGROWTH = 1024KB )
 LOG ON 
( NAME = N'Chatter_log', FILENAME = N'D:\Microsoft SQL Server\MSSQL.1\MSSQL\DATA\Chatter_log.ldf' , SIZE = 1536KB , MAXSIZE = 2048GB , FILEGROWTH = 10%)
 COLLATE SQL_Latin1_General_CP1_CI_AS
GO
EXEC dbo.sp_dbcmptlevel @dbname=N'Chatter', @new_cmptlevel=90
GO
IF (1 = FULLTEXTSERVICEPROPERTY('IsFullTextInstalled'))
begin
EXEC [Chatter].[dbo].[sp_fulltext_database] @action = 'disable'
end
GO
ALTER DATABASE [Chatter] SET ANSI_NULL_DEFAULT OFF 
GO
ALTER DATABASE [Chatter] SET ANSI_NULLS OFF 
GO
ALTER DATABASE [Chatter] SET ANSI_PADDING OFF 
GO
ALTER DATABASE [Chatter] SET ANSI_WARNINGS OFF 
GO
ALTER DATABASE [Chatter] SET ARITHABORT OFF 
GO
ALTER DATABASE [Chatter] SET AUTO_CLOSE OFF 
GO
ALTER DATABASE [Chatter] SET AUTO_CREATE_STATISTICS ON 
GO
ALTER DATABASE [Chatter] SET AUTO_SHRINK OFF 
GO
ALTER DATABASE [Chatter] SET AUTO_UPDATE_STATISTICS ON 
GO
ALTER DATABASE [Chatter] SET CURSOR_CLOSE_ON_COMMIT OFF 
GO
ALTER DATABASE [Chatter] SET CURSOR_DEFAULT  GLOBAL 
GO
ALTER DATABASE [Chatter] SET CONCAT_NULL_YIELDS_NULL OFF 
GO
ALTER DATABASE [Chatter] SET NUMERIC_ROUNDABORT OFF 
GO
ALTER DATABASE [Chatter] SET QUOTED_IDENTIFIER OFF 
GO
ALTER DATABASE [Chatter] SET RECURSIVE_TRIGGERS OFF 
GO
ALTER DATABASE [Chatter] SET  ENABLE_BROKER 
GO
ALTER DATABASE [Chatter] SET AUTO_UPDATE_STATISTICS_ASYNC OFF 
GO
ALTER DATABASE [Chatter] SET DATE_CORRELATION_OPTIMIZATION OFF 
GO
ALTER DATABASE [Chatter] SET TRUSTWORTHY OFF 
GO
ALTER DATABASE [Chatter] SET ALLOW_SNAPSHOT_ISOLATION OFF 
GO
ALTER DATABASE [Chatter] SET PARAMETERIZATION SIMPLE 
GO
ALTER DATABASE [Chatter] SET  READ_WRITE 
GO
ALTER DATABASE [Chatter] SET RECOVERY FULL 
GO
ALTER DATABASE [Chatter] SET  MULTI_USER 
GO
ALTER DATABASE [Chatter] SET PAGE_VERIFY CHECKSUM  
GO
ALTER DATABASE [Chatter] SET DB_CHAINING OFF 

/***************************************************/

USE [Chatter]
GO
/****** Object:  Table [dbo].[Message]    Script Date: 11/18/2005 13:56:39 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[Message](
    [int] [bigint] IDENTITY(1,1) NOT NULL,
    [Message] [nvarchar](200) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL,
    [Person_ID] [int] NOT NULL,
 CONSTRAINT [PK_Message] PRIMARY KEY CLUSTERED 
(
    [int] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]

USE [Chatter]
GO
/****** Object:  Table [dbo].[Person]    Script Date: 11/18/2005 13:56:56 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[Person](
    [id] [int] IDENTITY(1,1) NOT NULL,
    [Name] [nvarchar](50) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL,
 CONSTRAINT [PK_Person] PRIMARY KEY CLUSTERED 
(
    [id] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]

USE [Chatter]
GO
/****** Object:  StoredProcedure [dbo].[usp_GetMessages]    Script Date: 11/18/2005 13:59:20 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE PROC [dbo].[usp_GetMessages]

AS

SELECT [Message], [Name]
FROM dbo.[Message]
JOIN dbo.Person ON id = [Message].Person_ID

USE [Chatter]
GO
/****** Object:  StoredProcedure [dbo].[usp_InsertMessage]    Script Date: 11/18/2005 13:59:35 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE PROC [dbo].[usp_InsertMessage]
    @Message nvarchar(200),
    @Person_ID int
AS

INSERT INTO [Message] ([Message], Person_ID)
VALUES (@Message, @Person_ID)
GO
/****************************************/
INSERT INTO [Chatter].[dbo].[Person]
([Name])
VALUES('Larry')
GO
INSERT INTO [Chatter].[dbo].[Person]
([Name])
VALUES('Moe')
GO
INSERT INTO [Chatter].[dbo].[Person]
([Name])
VALUES('Curly')  

这是我的数据库创建脚本(我只是用“ISS”替换了所有“Chatter”)

USE [master]
GO
/****** Object:  Database [ISS]    Script Date: 11/18/2005 13:55:20 ******/
CREATE DATABASE [ISS] ON  PRIMARY 
( NAME = N'ISS', FILENAME = N'D:\iss.mdf' , SIZE = 5120KB , MAXSIZE = UNLIMITED, FILEGROWTH = 1024KB )
 LOG ON 
( NAME = N'ISS_log', FILENAME = N'D:\iss_log.ldf' , SIZE = 1536KB , MAXSIZE = 2048GB , FILEGROWTH = 10%)
 COLLATE SQL_Latin1_General_CP1_CI_AS
GO
EXEC dbo.sp_dbcmptlevel @dbname=N'ISS', @new_cmptlevel=90
GO
IF (1 = FULLTEXTSERVICEPROPERTY('IsFullTextInstalled'))
begin
EXEC [ISS].[dbo].[sp_fulltext_database] @action = 'disable'
end
GO
ALTER DATABASE [ISS] SET ANSI_NULL_DEFAULT OFF 
GO
ALTER DATABASE [ISS] SET ANSI_NULLS OFF 
GO
ALTER DATABASE [ISS] SET ANSI_PADDING OFF 
GO
ALTER DATABASE [ISS] SET ANSI_WARNINGS OFF 
GO
ALTER DATABASE [ISS] SET ARITHABORT OFF 
GO
ALTER DATABASE [ISS] SET AUTO_CLOSE OFF 
GO
ALTER DATABASE [ISS] SET AUTO_CREATE_STATISTICS ON 
GO
ALTER DATABASE [ISS] SET AUTO_SHRINK OFF 
GO
ALTER DATABASE [ISS] SET AUTO_UPDATE_STATISTICS ON 
GO
ALTER DATABASE [ISS] SET CURSOR_CLOSE_ON_COMMIT OFF 
GO
ALTER DATABASE [ISS] SET CURSOR_DEFAULT  GLOBAL 
GO
ALTER DATABASE [ISS] SET CONCAT_NULL_YIELDS_NULL OFF 
GO
ALTER DATABASE [ISS] SET NUMERIC_ROUNDABORT OFF 
GO
ALTER DATABASE [ISS] SET QUOTED_IDENTIFIER OFF 
GO
ALTER DATABASE [ISS] SET RECURSIVE_TRIGGERS OFF 
GO
ALTER DATABASE [ISS] SET  ENABLE_BROKER 
GO
ALTER DATABASE [ISS] SET AUTO_UPDATE_STATISTICS_ASYNC OFF 
GO
ALTER DATABASE [ISS] SET DATE_CORRELATION_OPTIMIZATION OFF 
GO
ALTER DATABASE [ISS] SET TRUSTWORTHY OFF 
GO
ALTER DATABASE [ISS] SET ALLOW_SNAPSHOT_ISOLATION OFF 
GO
ALTER DATABASE [ISS] SET PARAMETERIZATION SIMPLE 
GO
ALTER DATABASE [ISS] SET  READ_WRITE 
GO
ALTER DATABASE [ISS] SET RECOVERY FULL 
GO
ALTER DATABASE [ISS] SET  MULTI_USER 
GO
ALTER DATABASE [ISS] SET PAGE_VERIFY CHECKSUM  
GO
ALTER DATABASE [ISS] SET DB_CHAINING OFF 

USE [ISS]

create table sectii (
    cods int identity(0,1) primary key,
    denumire varchar(30) not null,
)         

create table useri (
    codu int identity(0,1) primary key,
    login varchar(20) not null,
    password varchar(30) not null,
    cods int foreign key references sectii(cods),
    tip int not null,
)

create table medicamente (
    codm int identity(0,1) primary key,
    denumire varchar(50) not null
)

create table comenzi (
    codc int identity(0,1) primary key,
    cods int foreign key references sectii(cods),
    data datetime not null,
    codu int foreign key references useri(codu), --nu e nevoie
    onorata bit
)

create table medicamente_comanda (
    codc int foreign key references comenzi(codc) ON DELETE CASCADE,
    codm int foreign key references medicamente(codm),
    cantitate int
)                            

Answer 1

您的基础表结构中可能有不正确的数据类型或其他一些非法问题。我建议您查看这篇文章并确保您满足“支持的 SELECT 语句”部分下的所有条件:

http://msdn.microsoft.com/en-us/library/ms181122%28v=sql.105%29.aspx