例外：無法連接到SQL Server數據庫

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我試圖創建一個新的SQL服務器數據庫，但它不工作。我正在使用aspnet_regsql.exe。例外：無法連接到SQL Server數據庫

我用這些「服務器名稱」和「數據庫名稱」：

Server name: .\sqlexpress 
Database name: <default>

這是我的錯誤：

Setup failed. 

Exception: 
Unable to connect to SQL Server database. 

---------------------------------------- 
Details of failure 
---------------------------------------- 

System.Web.HttpException (0x80004005): Unable to connect to SQL Server database. ---> System.Data.SqlClient.SqlException (0x80131904): Login failed for user 'Arad\Arad'. Reason: Server is in single user mode. Only one administrator can connect at this time. 
    at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction) 
    at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose) 
    at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady) 
    at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) 
    at System.Data.SqlClient.SqlInternalConnectionTds.CompleteLogin(Boolean enlistOK) 
    at System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean ignoreSniOpenTimeout, TimeoutTimer timeout, Boolean withFailover) 
    at System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString connectionOptions, SqlCredential credential, TimeoutTimer timeout) 
    at System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(TimeoutTimer timeout, SqlConnectionString connectionOptions, SqlCredential credential, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance) 
    at System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, Object providerInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString userConnectionOptions, SessionData reconnectSessionData) 
    at System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions) 
    at System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnectionPool pool, DbConnection owningObject, DbConnectionOptions options, DbConnectionPoolKey poolKey, DbConnectionOptions userOptions) 
    at System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection) 
    at System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection) 
    at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection) 
    at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection) 
    at System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection) 
    at System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) 
    at System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) 
    at System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry) 
    at System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry) 
    at System.Data.SqlClient.SqlConnection.Open() 
    at System.Web.Management.SqlServices.GetSqlConnection(String server, String user, String password, Boolean trusted, String connectionString) 
ClientConnectionId:a468a12c-632a-43d0-be32-a0a30e4fb5c1 
    at System.Web.Management.SqlServices.GetSqlConnection(String server, String user, String password, Boolean trusted, String connectionString) 
    at System.Web.Management.SqlServices.SetupApplicationServices(String server, String user, String password, Boolean trusted, String connectionString, String database, String dbFileName, SqlFeatures features, Boolean install) 
    at System.Web.Management.ConfirmPanel.Execute()

如果你能告訴我怎麼解決這個問題，我會樂於！謝謝！

來源

2014-10-09 Aradmey

那麼你的機器上有什麼版本的SQL Server？你有SQL Server ** Express **（或其他）嗎？你用*默認實例名稱*（'SQLEXPRESS'）安裝它，還是選擇了其他東西？ – 2014-10-09 15:18:15

只是谷歌'原因：服務器處於單用戶模式' – 2014-10-09 15:19:57

查看您的堆棧跟蹤

Reason: Server is in single user mode. Only one administrator can connect at this time.

它看起來像你的SQL Server實例是在單用戶模式。看看這個article，作者解釋瞭如何從單用戶模式中刪除你的服務器。

爲了迴應您的評論，我提供的文章建議在SQL Server Management Studio中運行這些查詢。從提供的堆棧跟蹤，我相信，當您登錄到數據庫服務器SSMS，你會看到（單個用戶）旁邊的數據庫，如：

enter image description here

您應選擇「主」數據庫從您的數據庫下拉列表中並執行文章中引用的查詢。這有意義嗎？

來源

2014-10-09 17:14:30 MDiesel

我不明白什麼是你給我的文章sp_dboption。你能解釋一下嗎？如何執行這些命令等。？ – Aradmey 2014-10-09 19:06:52

例外：無法連接到SQL Server數據庫

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