我遇到了一个似乎相当普遍的问题，但我搜索了类似的问题，但似乎没有一个是最新的，所以我希望有人可以在这里提出建议。一旦部署到Azure网站上，我就不能让 ELMAH 在我的 mvc4 应用程序中工作，而在我的开发环境中本地工作时它可以正常工作。
以下是详细信息：
1）我创建了一个MVC4网络互联网应用，并在其中添加了Elmah.MVC NuGet包（报告页面显示的Elmah版本为1.2.14706.955）。
2) 我完成了 (1) 对我的 web.config 所做的修改，方法是添加：
在appSettings中：
<add key="elmah.mvc.disableHandler" value="false" /> <add key="elmah.mvc.disableHandleErrorFilter" value="false" /> <add key="elmah.mvc.requiresAuthentication" value=" true" /> <add key="elmah.mvc.allowedRoles" value="administrator" /> <add key="elmah.mvc.route" value="elmah" />
在埃尔玛：
<security allowRemoteAccess="true" /> <errorLog type="Elmah.SqlErrorLog, Elmah" connectionStringName="DefaultConnection" />
我的DefaultConnection字符串是一个“标准”SqlServer 字符串，例如：
<add name="DefaultConnection" connectionString="Server=tcp:servername.database.windows.net,1433;Database=dbname;User ID=username;Password=password;Trusted_Connection=False;Encrypt=True;Connection Timeout=30;" providerName="System.Data.SqlClient" />
现在，在本地工作时，未处理的异常会记录到数据库中。在 Azure 上部署时，会引发异常，但不会将任何内容记录到 (Azure SQL) 数据库中。
我可以在本地和远程成功地遵循路径 mywebsite/elmah：只有当我尝试远程路径时，elmah 生成的视图没有显示任何记录，因为数据库中没有存储任何内容。
相同的远程数据库用于用户帐户和所有其他目的，因此我可以确定 Web 应用程序可以与数据库通信。简单地说，一旦部署在 Azure 上，就不会记录任何异常。
我使用以下 SQL 创建了 ELMAH 表和存储过程：
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
)
GO
ALTER TABLE [dbo].[ELMAH_Error] WITH NOCHECK ADD
CONSTRAINT [PK_ELMAH_Error] PRIMARY KEY NONCLUSTERED ([ErrorId])
GO
ALTER TABLE [dbo].[ELMAH_Error] ADD
CONSTRAINT [DF_ELMAH_Error_ErrorId] DEFAULT (NEWID()) FOR [ErrorId]
GO
CREATE NONCLUSTERED INDEX [IX_ELMAH_Error_App_Time_Seq] ON [dbo].[ELMAH_Error]
(
[Application] ASC,
[TimeUtc] DESC,
[Sequence] DESC
)
GO
/* ------------------------------------------------------------------------
STORED PROCEDURES
------------------------------------------------------------------------ */
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_NULLS ON
GO
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
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
SELECT
@TotalCount = COUNT(1)
FROM
[ELMAH_Error]
WHERE
[Application] = @Application
-- Get the ID of the first error for the requested page
SET @StartRowIndex = @PageIndex * @PageSize + 1
IF @StartRowIndex <= @TotalCount
BEGIN
SET ROWCOUNT @StartRowIndex
SELECT
@FirstTimeUTC = [TimeUtc],
@FirstSequence = [Sequence]
FROM
[ELMAH_Error]
WHERE
[Application] = @Application
ORDER BY
[TimeUtc] DESC,
[Sequence] DESC
END
ELSE
BEGIN
SET @PageSize = 0
END
-- Now set the row count to the requested page size and get
-- all records below it for the pertaining application.
SET ROWCOUNT @PageSize
SELECT
errorId = [ErrorId],
application = [Application],
host = [Host],
type = [Type],
source = [Source],
message = [Message],
[user] = [User],
statusCode = [StatusCode],
time = CONVERT(VARCHAR(50), [TimeUtc], 126) + 'Z'
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
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