我将网站从SimpleMembership升级为Identity。这一切都在我的本地机器上工作正常，但是当我发布时，似乎有一些我无法找到的孤立设置，因为在服务器上它： a）自动创建一个App_Data文件夹（它在我的本地项目中不存在）和 b）（我认为这是相关的）它试图创建一个本地SQL表达，但创建失败。然后它尝试访问这个不存在的数据库并失败，因为它不存在。为什么它需要这个SQLExpress，Web.config中有一个有效的连接字符串？
A network-related or instance-specific error occurred while establishing a
connection to SQL Server. The server was not found or was not accessible.
Verify that the instance name is correct and that SQL Server is configured
to allow remote connections. (provider: SQL Network Interfaces, error: 26 -
Error Locating Server/Instance Specified)
Description: An unhandled exception occurred during the execution of the
current web request. Please review the stack trace for more information
about the error and where it originated in the code.
SQLExpress database file auto-creation error:
The connection string specifies a local Sql Server Express instance using a
database location within the application's App_Data directory. The provider
attempted to automatically create the application services database because
the provider determined that the database does not exist. The following
configuration requirements are necessary to successfully check for existence
of the application services database and automatically create the
application services database:
If the application is running on either Windows 7 or Windows Server 2008R2,
special configuration steps are necessary to enable automatic creation of
the provider database. Additional information is available at:
http://go.microsoft.com/fwlink/?LinkId=160102. If the application's App_Data
directory does not already exist, the web server account must have read and write access to the application's directory. This is necessary because the web server account will automatically create the App_Data directory if it does not already exist.
If the application's App_Data directory already exists, the web server account only requires read and write access to the application's App_Data directory. This is necessary because the web server account will attempt to verify that the Sql Server Express database already exists within the application's App_Data directory. Revoking read access on the App_Data directory from the web server account will prevent the provider from correctly determining if the Sql Server Express database already exists. This will cause an error when the provider attempts to create a duplicate of an already existing database. Write access is required because the web server account's credentials are used when creating the new database.
Sql Server Express must be installed on the machine.
The process identity for the web server account must have a local user profile. See the readme document for details on how to create a local user profile for both machine and domain accounts.
来源错误：
在执行当前Web请求期间生成了未处理的异常。可以使用下面的异常堆栈跟踪来识别有关异常的起源和位置的信息。
堆栈追踪：
[SqlException（0x80131904）：建立与SQL Server的连接时发生与网络相关或特定于实例的错误。服务器未找到或无法访问。验证实例名称是否正确，以及SQL Server是否配置为允许远程连接。 （提供程序：SQL网络接口，错误：26 - 找到指定的服务器/实例时出错）]
System.Data.SqlClient.SqlInternalConnection.OnError（SqlException exception，Boolean breakConnection，Action 1 wrapCloseInAction) +6568558
System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose) +717
System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, Boolean withFailover) +6595000
System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean ignoreSniOpenTimeout, TimeoutTimer timeout, Boolean withFailover) +219
System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString connectionOptions, SqlCredential credential, TimeoutTimer timeout) +6597350
System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(TimeoutTimer timeout, SqlConnectionString connectionOptions, SqlCredential credential, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance) +6597891
System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, Object providerInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString userConnectionOptions, SessionData reconnectSessionData) +942
System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions) +816
System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup, DbConnectionOptions userOptions) +61
System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource 1 retry，DbConnectionOptions userOptions，DbConnectionInternal oldConnection，DbConnectionInternal＆amp; connection）+953
System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal（DbConnection outerConnection，DbConnectionFactory connectionFactory，TaskCompletionSource 1 retry, DbConnectionOptions userOptions) +6605639
System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource 1 retry）+233
System.Data.SqlClient.SqlConnection.TryOpen（TaskCompletionSource`1 retry）+278
System.Data.SqlClient.SqlConnection.Open（）+239
System.Web.Management.SqlServices.GetSqlConnection（String server，String user，String password，Boolean trusted，String connectionString）+98
[HttpException（0x80004005）：无法连接到SQL Server数据库。] System.Web.Management.SqlServices.GetSqlConnection（String server，String user，String password，Boolean trusted，String connectionString）+4572410 System.Web.Management.SqlServices.SetupApplicationServices（String server，String user，String password，Boolean trusted，String connectionString，String database，String dbFileName，SqlFeatures features，Boolean install）+229 System.Web.DataAccess.SqlConnectionHelper.CreateMdfFile（String fullFileName，String dataDir，String connectionString）+908