創建和配置ASP.NET Session狀態數據庫
在基于NLB（網絡負載平衡）環境下的ASP.NET Web應用程序開發，我們需要將Session存儲在數據庫中供多個Web應用程序調用，以下為配置方法及注意事項。
1.創建用于存儲ASP.NET Session的數據庫（遠程、本地皆可，使用數據庫用戶身份認證） 在Windows\Microsoft.NET\Framework/V2.0.50727目錄下使用如下命令： aspnet_regsql.exe -S <SQL Server IP> -U <User Name> -P <Password> -E -ssadd -sstype c -d <Database Name> 命令執行后就會成功建立起用于存儲ASP.NET Session變量的數據庫了。
2.Web.Config文件配置項 我們需要在ASP.NET Web應用程序中的Web.Config文件修改sessionState配置項以使Session狀態數據庫生效。 配置節點如下： <sessionState mode="SQLServer" ??????????? sqlConnectionString="server=<Server IP>;database=<Database Name>;uid=<User Name>;pwd=<Password>;" allowCustomSqlDatabase="True" ??????????? cookieless="false" ??????????? timeout="20" />
3.注意在進行系統測試（主要是負載測試）的時候，因為數據庫訪問負載的增加，需要調整SQL Server相應超時的配置項以適應負載。（默認值為10，請適度進行調整。）
ASP.NET Session狀態數據庫數據模型 1.ASPStateTempSessions表定義

列名類型描述

SessionId	nvarchar(88)	Session ID + application ID
Created	datetime	Date and time session was created (UTC)
Expires	datetime	Date and time session expires (UTC)
LockDate	datetime	UTC date and time session was locked
LockDateLocal	datetime	Local date and time session was locked
LockCookie	int	Lock ID
Timeout	int	Session timeout in minutes
Locked	bit	1=Session locked, 0=Session not locked
SessionItemShort	varbinary(7000)	Serialized session state (if <= 7,000 bytes)
SessionItemLong	image	Serialized session state (if > 7,000 bytes)
Flags	int	Session state flags (1=Uninitialized session)

2.ASPStateTempApplications表定義 列名類型描述

AppId	int	Application ID
AppName	char(280)	Application name

?

3.使用的存儲過程

Stored ProcedureDescription

CreateTempTables	Creates the ASPStateTempSessions and ASPStateTempApplications tables; called during setup, but not called by SqlSessionStateStore.
DeleteExpiredSessions	Used by SQL Server Agent to remove expired sessions.
GetHashCode	Hashes an application name and returns the hash; called by TempGetAppID.
GetMajorVersion	Returns SQL Server's major version number.
TempGetAppID	Converts an application name into an application ID; queries the ASPStateTempApplications table and inserts a new record if necessary.
TempGetStateItem	Retrieves read-only session state from the database (ASP.NET 1.0; ASP.NET 1.1/SQL Server 7).
TempGetStateItem2	Retrieves read-only session state from the database (ASP.NET 1.1).
TempGetStateItem3	Retrieves read-only session state from the database (ASP.NET 2.0).
TempGetStateItemExclusive	Retrieves read/write session state from the database (ASP.NET 1.0; ASP.NET 1.1/SQL Server 7).
TempGetStateItemExclusive2	Retrieves read/write session state from the database (ASP.NET 1.1).
TempGetStateItemExclusive3	Retrieves read/write session state from the database (ASP.NET 2.0).
TempGetVersion	Marker whose presence indicates to ASP.NET 2.0 that the session state database is ASP.NET 2.0-compatible.
TempInsertStateItemLong	Adds a new session, whose size is > 7,000 bytes, to the database.
TempInsertStateItemShort	Adds a new session, whose size is <= 7,000 bytes, to the database.
TempInsertUninitializedItem	Adds a new uninitialized session to the database in support of cookieless sessions.
TempReleaseStateItemExclusive	Releases a lock on a session; called when ASP.NET determines that a request has timed out and calls the provider's ReleaseItemExclusive method.
TempRemoveStateItem	Removes a session from the database when the session is abandoned.
TempResetTimeout	Resets a session's timeout by writing the current date and time to the corresponding record's Expires field.
TempUpdateStateItemLong	Updates a session whose size is > 7,000 bytes.
TempUpdateStateItemLongNullShort	Updates a session whose old size is <= 7,000 bytes, but whose new size is > 7,000 bytes.
TempUpdateStateItemShort	Updates a session whose size is <= 7,000 bytes.
TempUpdateStateItemShortNullLong	Updates a session whose old size is > 7,000 bytes, but whose new size is <= 7,000 bytes.

ASP.NET 狀態數據庫FAQ
1.如果把SESSION值存放到數據庫中去，用戶關閉了程序那怎么樣清空數據庫里的SESSION值呢？ ?? 實際ASP.NET在創建狀態數據庫的時候會在SQL Server代理（SQL Server Agent）的作業中添加一個作業，名稱為<狀態數據庫名>_Job_DeleteExpiredSessions。如果打開SQL Server代理服務數據庫可以通過添加的狀態記錄的超時時間字段（Exprires）定期對超時的狀態數據進行刪除。
2.ASPStateTempSessions表中的SessionId字段如何使用？ 數據庫中此表的SessionID字段的值，由SessionID和AppID共同組成，最后8位為AppID所以，后8位之前一定是SessionID。例如，存儲在數據庫中的值為"ekr30c3mwvnc3145yrswew3a037e5e5a"，后8位的"037e5e5a"為AppID，而前面的"ekr30c3mwvnc3145yrswew3a"為應用程序中你可以使用Session.SessionID獲得的字符串。
3.如何判斷Session何時被更新的？ Session記錄被更新時會同時更新Expires和LockDateLocal，Expires字段為UTC時間，如果想通過本地之間進行比較判斷還是需要使用LockDateLocal。
4.獲得Web.config配置文件節點信息的程序？

?

?

Code ''獲得Web.config文件配置實例Dim configuration As System.Configuration.Configuration = System.Web.Configuration.WebConfigurationManager.OpenWebConfiguration("~/web.config")
''獲得狀態配置節點實例Dim mSessionStateSection As System.Web.Configuration.SessionStateSection =CType(configuration.GetSection("system.web/sessionState"),System.Web.Configuration.SessionStateSection)
''獲得狀態模式Response.Write(mSessionStateSection.Mode) ''獲得狀態超時時間Response.Write(mSessionStateSection.Timeout)

?

轉載于:https://www.cnblogs.com/zxktxj/archive/2012/03/09/2387416.html

總結

以上是生活随笔為你收集整理的使用SQL Server存储ASP.NET Session变量的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。