使用 Elmah一些要注意的问题

　1.　Elmah使用后，在发布时，要区分IIS6和IIS7 ，IIS6下 HttpModules必须在web.config或App.config 配置文件中使用 system.web注册，而IIS7 必须使用 sysem.webserver.

IIS6:

<system.web>
<httpModules>
<add name="ErrorLog" type="Elmah.ErrorLogModule, Elmah" />
</httpModules>
</system.web>

IIS7:

<system.webServer>
<modules>
<add name="ErrorLog" type="Elmah.ErrorLogModule, Elmah" />
</modules>
</system.webServer>

令外介绍下Elmah使用，这个是一款ASP.NET下的系统错误记录管理工具。 下载相应的dll,引用到project. 如果想记录在数据库，必须建立一张错误记录表。web.config配置如下.

<configSections>
<sectionGroup name="elmah">
<section name="security" requirePermission="false" type="Elmah.SecuritySectionHandler, Elmah"/>
<section name="errorLog" requirePermission="false" type="Elmah.ErrorLogSectionHandler, Elmah"/>
<section name="errorMail" requirePermission="false" type="Elmah.ErrorMailSectionHandler, Elmah"/>
<section name="errorFilter" requirePermission="false" type="Elmah.ErrorFilterSectionHandler, Elmah"/>
</sectionGroup>
</configSections>

<connectionStrings>
<add name="strCon" connectionString="Data Source=J18423X;Initial Catalog=UserDB;User ID=sa;Password=1234" providerName="System.Data.SqlClient"/>
</connectionStrings>

<elmah>
<security allowRemoteAccess="0" />
<errorLog type="Elmah.SqlErrorLog, Elmah" connectionStringName="strCon" />
</elmah>

<httpHandlers>
<add verb="POST,GET,HEAD" path="elmah.axd" type="Elmah.ErrorLogPageFactory, Elmah"/>
</httpHandlers>

//注意httpModules在IIS6和7中需要注意，如问题所述。

<httpModules>
<add name="ErrorLog" type="Elmah.ErrorLogModule, Elmah"/>
</httpModules>

<location path="elmah.axd">
<system.web>
<authorization>
<deny users="?"/>
</authorization>
</system.web>
</location>

数据库相关

/* 错误管理工具 SQL代码             */
CREATE TABLE dbo.ELMAH_Error
(
ErrorId     UNIQUEIDENTIFIER NOT NULL,
Application NVARCHAR(60) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL,
Host        NVARCHAR(50) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL,
Type        NVARCHAR(100) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL,
Source      NVARCHAR(60) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL,
Message     NVARCHAR(500) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL,
[User]      NVARCHAR(50) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL,
StatusCode INT NOT NULL,
TimeUtc     DATETIME NOT NULL,
Sequence    INT IDENTITY (1, 1) NOT NULL,
AllXml      NTEXT COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
GO

//创建主键

ALTER TABLE dbo.ELMAH_Error WITH NOCHECK ADD
CONSTRAINT PK_ELMAH_Error PRIMARY KEY NONCLUSTERED
(
ErrorId
) ON [PRIMARY]
GO

//创建默认约束

ALTER TABLE dbo.ELMAH_Error ADD
CONSTRAINT DF_ELMAH_Error_ErrorId DEFAULT (newid()) FOR [ErrorId]
GO

//创建非聚集索引

CREATE NONCLUSTERED INDEX IX_ELMAH_Error_App_Time_Seq ON dbo.ELMAH_Error
(
[Application] ASC,
[TimeUtc] DESC,
[Sequence] DESC
) ON [PRIMARY]
GO

SET QUOTED_IDENTIFIER ON

GO

SET ANSI_NULLS ON

GO




//创建存储过程，得到单个错误xml

CREATE PROCEDURE dbo.ELMAH_GetErrorXml
(
@Application NVARCHAR(60),
@ErrorId UNIQUEIDENTIFIER
)
AS
SET NOCOUNT ON
SELECT
AllXml
FROM
ELMAH_Error
WHERE
ErrorId = @ErrorId
AND
Application = @Application
GO

SET QUOTED_IDENTIFIER OFF
GO
SET ANSI_NULLS ON
GO

//创建存储过程，得到错误总记录

SET QUOTED_IDENTIFIER ON
GO
SET ANSI_NULLS ON
GO
CREATE PROCEDURE dbo.ELMAH_GetErrorsXml
(
@Application NVARCHAR(60),
@PageIndex INT = 0,
@PageSize INT = 15,
@TotalCount INT OUTPUT
)
AS
SET NOCOUNT ON
DECLARE @FirstTimeUTC DateTime
DECLARE @FirstSequence int
DECLARE @StartRow int
DECLARE @StartRowIndex int
-- Get the ID of the first error for the requested page
SET @StartRowIndex = @PageIndex * @PageSize + 1
SET ROWCOUNT @StartRowIndex
SELECT
@FirstTimeUTC = TimeUTC,
@FirstSequence = Sequence
FROM
ELMAH_Error
WHERE
Application = @Application
ORDER BY
TimeUTC DESC,
Sequence DESC
-- Now set the row count to the requested page size and get
-- all records below it for the pertaining application.
SET ROWCOUNT @PageSize
SELECT
@TotalCount = COUNT(1)
FROM
ELMAH_Error
WHERE
Application = @Application
SELECT
errorId,
application,
host,
type,
source,
message,
[user],
statusCode,
CONVERT(VARCHAR(50), TimeUtc, 126) + 'Z' time
FROM
ELMAH_Error error
WHERE
Application = @Application
AND
TimeUTC <= @FirstTimeUTC
AND
Sequence <= @FirstSequence
ORDER BY
TimeUTC DESC,
Sequence DESC
FOR
XML AUTO
GO

SET QUOTED_IDENTIFIER OFF

GO

SET ANSI_NULLS ON

GO

//存储过程：插入数据

SET QUOTED_IDENTIFIER ON
GO
SET ANSI_NULLS ON
GO
CREATE PROCEDURE dbo.ELMAH_LogError
(
@ErrorId UNIQUEIDENTIFIER,
@Application NVARCHAR(60),
@Host NVARCHAR(30),
@Type NVARCHAR(100),
@Source NVARCHAR(60),
@Message NVARCHAR(500),
@User NVARCHAR(50),
@AllXml NTEXT,
@StatusCode INT,
@TimeUtc DATETIME
)
AS
SET NOCOUNT ON
INSERT
INTO
ELMAH_Error
(
ErrorId,
Application,
Host,
Type,
Source,
Message,
[User],
AllXml,
StatusCode,
TimeUtc
)
VALUES
(
@ErrorId,
@Application,
@Host,
@Type,
@Source,
@Message,
@User,
@AllXml,
@StatusCode,
@TimeUtc
)
GO
SET QUOTED_IDENTIFIER OFF
GO
SET ANSI_NULLS ON
GO