摘要:使用过Enterprise Library的朋友可能都知道,所有的配置信息都是放在了配置文件里面(应用程序配置文件或者外部配置文件),大家有没有想过把配置信息保存到数据库中呢?
主要内容
1
.编译SqlConfiguration
2
.创建数据表和存储过程
3
.配置应用程序
4
.使用应用程序块
使用过Enterprise Library的朋友可能都知道,所有的配置信息都是放在了配置文件里面(应用程序配置文件或者外部配置文件),大家有没有想过把配置信息保存到数据库中呢?在Enterprise Library用ConfigurationSource替代了Configuration Application Block,看一下ConfigurationSource的结构图:
EL
默认的是System Configuration Source,关于如何使用File Configuration Source,在技巧(1)里面已经说过了,下面我们具体看一下使用Sql Configuration Source。
1
.编译SqlConfiguration
在安装目录的QuickStarts文件夹里面,编译后拷贝如下文件到bin目录中
Microsoft.Practices.EnterpriseLibrary.SqlConfigurationSource.dll
Microsoft.Practices.EnterpriseLibrary.SqlConfigurationSource.Design.dll
Microsoft.Practices.EnterpriseLibrary.ConfigurationSource.SQL.XML
Interop.MSDASC.dll
Microsoft.Practices.EnterpriseLibrary.SqlConfigurationSource.Design.dll
Microsoft.Practices.EnterpriseLibrary.ConfigurationSource.SQL.XML
Interop.MSDASC.dll
2
.创建数据表和存储过程
运行CreateSqlConfiguration.cmd,注意在这之前可能要先用记事本打开SqlConfiguration.sql文件,另存为Unicode格式,如下图:
默认将安装在Northwind数据库中,安装完成后数据库中有一张Configuration_Parameter表和四个相关的存储过程。
3
.配置应用程序
经过了上面两步之后,就可以开始配置应用程序了。新建一个项目,添加App.config,使用EntLibConfig.exe打开,在新建Configuration Source的时候,会发现菜单中多了一项Sql Configuration Source:
选择之后,出现如下界面,这时需要设置Sql Configuration Source的参数,如下图所示设置存储过程名称:
设置完成后,在Configuration Source的SelectedSource节点选中Sql Configuration Source:
这里为了测试,新建一个Logging Application Block。(当有Data Access Application Block时保存总会报错,不知道是什么问题?)保存后会在数据库中多出一条记录:
4
.使用应用程序块
当配置完成后,看看App.config配置文件:
<?
xml version="1.0" encoding="utf-8"
?>
< configuration >
< configSections >
< section name ="enterpriseLibrary.ConfigurationSource" type ="Microsoft.Practices.EnterpriseLibrary.Common.Configuration.ConfigurationSourceSection, Microsoft.Practices.EnterpriseLibrary.Common, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null" />
</ configSections >
< enterpriseLibrary .ConfigurationSource selectedSource ="Sql Configuration Source" >
< sources >
< add name ="Sql Configuration Source" type ="Microsoft.Practices.EnterpriseLibrary.SqlConfigurationSource.SqlConfigurationSource, Microsoft.Practices.EnterpriseLibrary.SqlConfigurationSource, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null"
connectionString ="Password=19811218;Persist Security Info=True;User ID=sa;Initial Catalog=Northwind;Data Source=RJ-097"
getStoredProcedure ="EntLib_GetConfig" setStoredProcedure ="EntLib_SetConfig"
refreshStoredProcedure ="UpdateSectionDate" removeStoredProcedure ="EntLib_RemoveSection" />
< add name ="System Configuration Source" type ="Microsoft.Practices.EnterpriseLibrary.Common.Configuration.SystemConfigurationSource, Microsoft.Practices.EnterpriseLibrary.Common, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null" />
</ sources >
</ enterpriseLibrary.ConfigurationSource >
</ configuration >
< configuration >
< configSections >
< section name ="enterpriseLibrary.ConfigurationSource" type ="Microsoft.Practices.EnterpriseLibrary.Common.Configuration.ConfigurationSourceSection, Microsoft.Practices.EnterpriseLibrary.Common, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null" />
</ configSections >
< enterpriseLibrary .ConfigurationSource selectedSource ="Sql Configuration Source" >
< sources >
< add name ="Sql Configuration Source" type ="Microsoft.Practices.EnterpriseLibrary.SqlConfigurationSource.SqlConfigurationSource, Microsoft.Practices.EnterpriseLibrary.SqlConfigurationSource, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null"
connectionString ="Password=19811218;Persist Security Info=True;User ID=sa;Initial Catalog=Northwind;Data Source=RJ-097"
getStoredProcedure ="EntLib_GetConfig" setStoredProcedure ="EntLib_SetConfig"
refreshStoredProcedure ="UpdateSectionDate" removeStoredProcedure ="EntLib_RemoveSection" />
< add name ="System Configuration Source" type ="Microsoft.Practices.EnterpriseLibrary.Common.Configuration.SystemConfigurationSource, Microsoft.Practices.EnterpriseLibrary.Common, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null" />
</ sources >
</ enterpriseLibrary.ConfigurationSource >
</ configuration >
编写一个简单的日志应用程序:
class
Program
{
static void Main(string[] args)
{
LogEntry log = new LogEntry();
log.Message = "This is a test!";
Logger.Write(log);
}
}
{
static void Main(string[] args)
{
LogEntry log = new LogEntry();
log.Message = "This is a test!";
Logger.Write(log);
}
}
运行程序后,在
trace.log中记录了这样的一条日志信息:
----------------------------------------
General Information: 0 : Timestamp: 2006-7-4 8:02:05
Message: This is a test!
Category: General
Priority: -1
EventId: 0
Severity: Information
Title:
Machine: RJ-097
App Domain: EntLibDemo1.vshost.exe
ProcessId: 5896
Process Name: D:\Visual Studio2005 Project\EntLibDemo1\EntLibDemo1\bin\Debug\EntLibDemo1.vshost.exe
Thread Name:
Win32 ThreadId:4304
Extended Properties:
----------------------------------------
General Information: 0 : Timestamp: 2006-7-4 8:02:05
Message: This is a test!
Category: General
Priority: -1
EventId: 0
Severity: Information
Title:
Machine: RJ-097
App Domain: EntLibDemo1.vshost.exe
ProcessId: 5896
Process Name: D:\Visual Studio2005 Project\EntLibDemo1\EntLibDemo1\bin\Debug\EntLibDemo1.vshost.exe
Thread Name:
Win32 ThreadId:4304
Extended Properties:
----------------------------------------
我们就可以把配置信息保存到了
SQL Server数据库中,也许有人觉得这个技巧不存在什么实际意义,但是特殊情况下,当你需要这样实现的时候,别忘了这篇Post。
本文转自lihuijun51CTO博客,原文链接: http://blog.51cto.com/terrylee/67626
,如需转载请自行联系原作者