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