黄聪：Microsoft Enterprise Library 5.0 系列教程(四) Logging Application Block

企业库日志应用程序模块工作原理图:

 

     从上图我们可以看清楚企业库日志应用程序模块的工作原理,其中LogFilter,Trace Source,Trace Listener,Log Formatter的信息都可以在Category配置文件中反映出来,通过配置文件,调用LogWriter类的Writer方法,就可以将包含日志信息的LogEntry实体写入Category配置文件中指定的设备了.

企业库日记应用程序模块提供了下列几种记录方法:

• The event log
• An e-mail message
• A database
• A message queue
• A text file
• A Windows®Management Instrumentation (WMI) event
• Custom locationsusing application block extension points

本文介绍一下如何使用企业库日记应用程序模块向日志文件,数据库,XML文件中写入程序操作日记:

 

一.  向日志文件写入日记

1. 运行EntLibConfig.exe,选择Blocks菜单 ,单击 Add LoggingSettings .

 

 

　　2.       对每个模块进行配置: 

 

　　3.       点击 File菜单,单击 Save,保存为一个App.config文件,可以先保存到桌面,之后要用到它.

 

　　4.       创建一个新的控制台应用程序,将App.config添加到程序内,并加入需要的Dll文件,在此我们要导入的是 Microsoft.Practices.EnterpriseLibrary. Logging.dll, Microsoft.Practices.EnterpriseLibrary. Logging.Database.dll并添加需要的引用:

 

　　添加引用:

using Microsoft.Practices.EnterpriseLibrary. Logging;

 

 

 

　　5.       测试:

 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using Microsoft.Practices.EnterpriseLibrary.Logging;

namespace ConsoleApplication1
{
    class Program
    {
        staticvoid Main(string[] args)
        {
            LogEntry logEntry =new LogEntry();

            logEntry.EventId =1;
            logEntry.Priority =1;
            logEntry.Title ="标题党";
            logEntry.Message ="http://www.cnblogs.com/huangcong/";
            logEntry.Categories.Add("C#学习");
            logEntry.Categories.Add("Microsoft Enterprise Library学习");

            Logger.Writer.Write(logEntry, "General");
            Console.WriteLine("日志写入完成!");
        }
    }
}

 

 

运行结果:

 

 

6.       开始—控制面板—系统和安全—查看事件日志—Windows日志—应用程序:

 

 

7.       第一个日志就是我们刚刚写入的日志啦,双击可以查看内容:

 

 

 

二.   向数据库写入日记 

1.       要将日志写入数据库,就得先新建一个日志数据库,我们可以在EntLib50Src文件夹下的Source\Blocks\Logging\Src\DatabaseTraceListener\Scripts目录中找到LoggingDatabase.sql文件,只要在数据库中运行即可自动生成一个日志数据库: 

 

为了方便大家,我直接将该文件发布在下面,大家直接复制到SQL中运行也可以:

 

/****** Object:  Database Logging    Script Date: 8/22/2005 ******/

USE[master]

GO

 

IFEXISTS (SELECT name FROM master.dbo.sysdatabases WHERE name = N'Logging')

         DROPDATABASE[Logging]

GO

 

CREATEDATABASE[Logging]

 COLLATE SQL_Latin1_General_CP1_CI_AS

GO

 

exec sp_dboption N'Logging', N'autoclose', N'false'

GO

 

exec sp_dboption N'Logging', N'bulkcopy', N'false'

GO

 

exec sp_dboption N'Logging', N'trunc. log', N'false'

GO

 

exec sp_dboption N'Logging', N'torn page detection', N'true'

GO

 

exec sp_dboption N'Logging', N'read only', N'false'

GO

 

exec sp_dboption N'Logging', N'dbo use', N'false'

GO

 

exec sp_dboption N'Logging', N'single', N'false'

GO

 

exec sp_dboption N'Logging', N'autoshrink', N'false'

GO

 

exec sp_dboption N'Logging', N'ANSI null default', N'false'

GO

 

exec sp_dboption N'Logging', N'recursive triggers', N'false'

GO

 

exec sp_dboption N'Logging', N'ANSI nulls', N'false'

GO

 

exec sp_dboption N'Logging', N'concat null yields null', N'false'

GO

 

exec sp_dboption N'Logging', N'cursor close on commit', N'false'

GO

 

exec sp_dboption N'Logging', N'default to local cursor', N'false'

GO

 

exec sp_dboption N'Logging', N'quoted identifier', N'false'

GO

 

exec sp_dboption N'Logging', N'ANSI warnings', N'false'

GO

 

exec sp_dboption N'Logging', N'auto create statistics', N'true'

GO

 

exec sp_dboption N'Logging', N'auto update statistics', N'true'

GO

 

use[Logging]

GO

 

SET ANSI_NULLS ON

GO

SET QUOTED_IDENTIFIER ON

GO

IFNOTEXISTS (SELECT*FROM dbo.sysobjects WHERE id =OBJECT_ID(N'[dbo].[Category]') ANDOBJECTPROPERTY(id, N'IsUserTable') =1)

BEGIN

CREATETABLE[dbo].[Category](

         [CategoryID][int]IDENTITY(1,1) NOTNULL,

         [CategoryName][nvarchar](64) NOTNULL,

 CONSTRAINT[PK_Categories]PRIMARYKEYCLUSTERED

(

         [CategoryID]ASC

) ON[PRIMARY]

) ON[PRIMARY]

END

GO

SET ANSI_NULLS OFF

GO

SET QUOTED_IDENTIFIER OFF

GO

SET ANSI_NULLS ON

GO

SET QUOTED_IDENTIFIER ON

GO

IFNOTEXISTS (SELECT*FROM dbo.sysobjects WHERE id =OBJECT_ID(N'[dbo].[CategoryLog]') ANDOBJECTPROPERTY(id, N'IsUserTable') =1)

BEGIN

CREATETABLE[dbo].[CategoryLog](

         [CategoryLogID][int]IDENTITY(1,1) NOTNULL,

         [CategoryID][int]NOTNULL,

         [LogID][int]NOTNULL,

 CONSTRAINT[PK_CategoryLog]PRIMARYKEYCLUSTERED

(

         [CategoryLogID]ASC

) ON[PRIMARY]

) ON[PRIMARY]

END

GO

SET ANSI_NULLS OFF

GO

SET QUOTED_IDENTIFIER OFF

GO

SET ANSI_NULLS ON

GO

SET QUOTED_IDENTIFIER ON

GO

IFNOTEXISTS (SELECT*FROM dbo.sysobjects WHERE id =OBJECT_ID(N'[dbo].[Log]') ANDOBJECTPROPERTY(id, N'IsUserTable') =1)

BEGIN

CREATETABLE[dbo].[Log](

         [LogID][int]IDENTITY(1,1) NOTNULL,

         [EventID][int]NULL,

         [Priority][int]NOTNULL,

         [Severity][nvarchar](32) NOTNULL,

         [Title][nvarchar](256) NOTNULL,

         [Timestamp][datetime]NOTNULL,

         [MachineName][nvarchar](32) NOTNULL,

         [AppDomainName][nvarchar](512) NOTNULL,

         [ProcessID][nvarchar](256) NOTNULL,

         [ProcessName][nvarchar](512) NOTNULL,

         [ThreadName][nvarchar](512) NULL,

         [Win32ThreadId][nvarchar](128) NULL,

         [Message][nvarchar](1500) NULL,

         [FormattedMessage][ntext]NULL,

 CONSTRAINT[PK_Log]PRIMARYKEYCLUSTERED

(

         [LogID]ASC

) ON[PRIMARY]

) ON[PRIMARY] TEXTIMAGE_ON [PRIMARY]

END

GO

SET ANSI_NULLS OFF

GO

SET QUOTED_IDENTIFIER OFF

GO

SET ANSI_NULLS ON

GO

SET QUOTED_IDENTIFIER ON

GO

IFNOTEXISTS (SELECT*FROM sysobjects WHERE id =OBJECT_ID(N'[dbo].[InsertCategoryLog]') AND type in (N'P', N'PC'))

BEGIN

EXEC dbo.sp_executesql @statement= N'CREATE PROCEDURE InsertCategoryLog

         @CategoryID INT,

         @LogID INT

AS

BEGIN

         SET NOCOUNT ON;

 

         DECLARE @CatLogID INT

         SELECT @CatLogID FROM CategoryLog WHERE CategoryID=@CategoryID and LogID = @LogID

         IF @CatLogID IS NULL

         BEGIN

                   INSERT INTO CategoryLog (CategoryID, LogID) VALUES(@CategoryID, @LogID)

                   RETURN @@IDENTITY

         END

         ELSE RETURN @CatLogID

END

'

END

GO

SET ANSI_NULLS OFF

GO

SET QUOTED_IDENTIFIER OFF

GO

SET ANSI_NULLS ON

GO

SET QUOTED_IDENTIFIER ON

GO

IFNOTEXISTS (SELECT*FROM sysobjects WHERE id =OBJECT_ID(N'[dbo].[AddCategory]') AND type in (N'P', N'PC'))

BEGIN

EXEC dbo.sp_executesql @statement= N'

 

CREATE PROCEDURE [dbo].[AddCategory]

         -- Add the parameters for the function here

         @CategoryName nvarchar(64),

         @LogID int

AS

BEGIN

         SET NOCOUNT ON;

    DECLARE @CatID INT

         SELECT @CatID = CategoryID FROM Category WHERE CategoryName = @CategoryName

         IF @CatID IS NULL

         BEGIN

                   INSERT INTO Category (CategoryName) VALUES(@CategoryName)

                   SELECT @CatID = @@IDENTITY

         END

 

         EXEC InsertCategoryLog @CatID, @LogID

 

         RETURN @CatID

END

 

'

END

GO

SET ANSI_NULLS OFF

GO

SET QUOTED_IDENTIFIER OFF

GO

SET ANSI_NULLS ON

GO

SET QUOTED_IDENTIFIER ON

GO

IFNOTEXISTS (SELECT*FROM sysobjects WHERE id =OBJECT_ID(N'[dbo].[ClearLogs]') AND type in (N'P', N'PC'))

BEGIN

EXEC dbo.sp_executesql @statement= N'CREATE PROCEDURE ClearLogs

AS

BEGIN

         SET NOCOUNT ON;

 

         DELETE FROM CategoryLog

         DELETE FROM [Log]

    DELETE FROM Category

END

'

END

GO

SET ANSI_NULLS OFF

GO

SET QUOTED_IDENTIFIER OFF

GO

SET ANSI_NULLS ON

GO

SET QUOTED_IDENTIFIER ON

GO

IFNOTEXISTS (SELECT*FROM sysobjects WHERE id =OBJECT_ID(N'[dbo].[WriteLog]') AND type in (N'P', N'PC'))

BEGIN

EXEC dbo.sp_executesql @statement= N'

 

 

 

/****** Object:  Stored Procedure dbo.WriteLog    Script Date: 10/1/2004 3:16:36 PM ******/

 

CREATE PROCEDURE [dbo].[WriteLog]

(

         @EventID int,

         @Priority int,

         @Severity nvarchar(32),

         @Title nvarchar(256),

         @Timestamp datetime,

         @MachineName nvarchar(32),

         @AppDomainName nvarchar(512),

         @ProcessID nvarchar(256),

         @ProcessName nvarchar(512),

         @ThreadName nvarchar(512),

         @Win32ThreadId nvarchar(128),

         @Message nvarchar(1500),

         @FormattedMessage ntext,

         @LogId int OUTPUT

)

AS

 

         INSERT INTO [Log] (

                   EventID,

                   Priority,

                   Severity,

                   Title,

                   [Timestamp],

                   MachineName,

                   AppDomainName,

                   ProcessID,

                   ProcessName,

                   ThreadName,

                   Win32ThreadId,

                   Message,

                   FormattedMessage

         )

         VALUES (

                   @EventID,

                   @Priority,

                   @Severity,

                   @Title,

                   @Timestamp,

                   @MachineName,

                   @AppDomainName,

                   @ProcessID,

                   @ProcessName,

                   @ThreadName,

                   @Win32ThreadId,

                   @Message,

                   @FormattedMessage)

 

         SET @LogID = @@IDENTITY

         RETURN @LogID

 

 

 

'

END

GO

SET ANSI_NULLS OFF

GO

SET QUOTED_IDENTIFIER OFF

GO

IFNOTEXISTS (SELECT*FROM sysobjects WHERE id =OBJECT_ID(N'FK_CategoryLog_Category') AND parent_obj =OBJECT_ID(N'[dbo].[CategoryLog]'))

ALTERTABLE[dbo].[CategoryLog]WITHCHECKADDCONSTRAINT[FK_CategoryLog_Category]FOREIGNKEY( [CategoryID])

REFERENCES[dbo].[Category] (       [CategoryID])

GO

IFNOTEXISTS (SELECT*FROM sysobjects WHERE id =OBJECT_ID(N'FK_CategoryLog_Log') AND parent_obj =OBJECT_ID(N'[dbo].[CategoryLog]'))

ALTERTABLE[dbo].[CategoryLog]WITHCHECKADDCONSTRAINT[FK_CategoryLog_Log]FOREIGNKEY(   [LogID])

REFERENCES[dbo].[Log] (        [LogID])

GO

 

SET QUOTED_IDENTIFIER ON

SET ARITHABORT ON

SET CONCAT_NULL_YIELDS_NULL ON

SET ANSI_NULLS ON

SET ANSI_PADDING ON

SET ANSI_WARNINGS ON

SET NUMERIC_ROUNDABORT OFF

go

 

DECLARE@bErrorsasbit

 

BEGINTRANSACTION

SET@bErrors=0

 

CREATENONCLUSTEREDINDEX[ixCategoryLog]ON[dbo].[CategoryLog] ([LogID]ASC, [CategoryID]ASC )

IF( @@error<>0 ) SET@bErrors=1

 

IF( @bErrors=0 )

  COMMITTRANSACTION

ELSE

  ROLLBACKTRANSACTION

 
 

2.       点击Logging Target Listeners  区块右上角的加号按钮, Add Logging Target Listeners然后点击 Add Database Listeners ,属性设置如下:

 

 

3.       File—Save,保存App.config,无需改动VS中的程序直接再次运行,运行结果如下:

 

 

4.       查看Logging数据库,可以看到刚刚写入的日志:

SELECT*FROM[Logging].[dbo].[Category]
GO
SELECT*FROM[Logging].[dbo].[Log]
GO

 

      

  

 

三.  向XML文件写入日记 

1.    创建一个XML文件,我建在上面创建好的工程目录下,命名为test.xml,点击Logging Target Listeners  区块右上角的加号按钮, Add Logging Target Listeners然后点击 Add XML Listeners ,属性设置如下:

 

 

2.       File—Save,保存App.config,无需改动VS中的程序直接再次运行,运行结果如下:

3.       打开test.xml文件,内容如图所示:

 

哈哈.好了,今天的教程就做到这里,吃午餐~睡觉~下午上课去(最讨厌学校的实验课了)~

请输