I have a problem when I want to open a page with the database record. This page is created in Visual Web Developer 2005 Express. When I try to open a page I get the following error message even though the connection between the database is ok:

An attempt to attach an auto-named database for file C:\Inetpub\wwwroot\membership\App_Data\aspnetdb.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share.

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.

Exception Details:System.Data.SqlClient.SqlException: An attempt to attach an auto-named database for file C:\Inetpub\wwwroot\membership\App_Data\aspnetdb.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share.

I have a computer with Windows XP Professional running IIS 5.1 and ASP.NET 2.0.
Also I have SQL Express on my machine.
Does any one know how to resolve it.
Thanks Smile [:)]

Here is the entire error message that I am getting:

Server Error in '/membership' Application.

An attempt to attach an auto-named database for file C:\Inetpub\wwwroot\membership\App_Data\aspnetdb.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[SqlException (0x80131904): An attempt to attach an auto-named database for file C:\Inetpub\wwwroot\membership\App_Data\aspnetdb.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share.] System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject) +437 System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) +82 System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) +105 System.Data.SqlClient.SqlConnection.Open() +111 System.Web.DataAccess.SqlConnectionHolder.Open(HttpContext context, Boolean revertImpersonate) +84 System.Web.DataAccess.SqlConnectionHelper.GetConnection(String connectionString, Boolean revertImpersonation) +197 System.Web.Security.SqlMembershipProvider.GetPasswordWithFormat(String username, Boolean updateLastLoginActivityDate, Int32& status, String& password, Int32& passwordFormat, String& passwordSalt, Int32& failedPasswordAttemptCount, Int32& failedPasswordAnswerAttemptCount, Boolean& isApproved, DateTime& lastLoginDate, DateTime& lastActivityDate) +1121 System.Web.Security.SqlMembershipProvider.CheckPassword(String username, String password, Boolean updateLastLoginActivityDate, Boolean failIfNotApproved, String& salt, Int32& passwordFormat) +105 System.Web.Security.SqlMembershipProvider.CheckPassword(String username, String password, Boolean updateLastLoginActivityDate, Boolean failIfNotApproved) +42 System.Web.Security.SqlMembershipProvider.ValidateUser(String username, String password) +83 System.Web.UI.WebControls.Login.OnAuthenticate(AuthenticateEventArgs e) +160 System.Web.UI.WebControls.Login.AttemptLogin() +105 System.Web.UI.WebControls.Login.OnBubbleEvent(Object source, EventArgs e) +99 System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args) +35 System.Web.UI.WebControls.Button.OnCommand(CommandEventArgs e) +115 System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +163 System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +7 System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +11 System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +33 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5102

Version Information: Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.42

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This is what I found in the event viewer:

Event Type: Warning
Event Source: ASP.NET 2.0.50727.0
Event Category: Web Event
Event ID: 1309
Date: 1/24/2006
Time: 5:17:15 PM
User: N/A
Computer: DEVELOMPMENT-CO
Description:
Event code: 3005
Event message: An unhandled exception has occurred.
Event time: 1/24/2006 5:17:15 PM
Event time (UTC): 1/24/2006 10:17:15 PM
Event ID: 29652843fd234fc6a5a00bd4f9652894
Event sequence: 4
Event occurrence: 3
Event detail code: 0

Application information:
Application domain: /LM/W3SVC/1/ROOT/membership-7-127826143653860928
Trust level: Full
Application Virtual Path: /membership
Application Path: C:\Inetpub\wwwroot\membership\
Machine name: DEVELOMPMENT-CO

Process information:
Process ID: 2724
Process name: aspnet_wp.exe
Account name: DEVELOMPMENT-CO\ASPNET

Exception information:
Exception type: SqlException
Exception message: An attempt to attach an auto-named database for file C:\Inetpub\wwwroot\membership\App_Data\aspnetdb.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share.

Request information:
Request URL:http://localhost/membership/Login.aspx
Request path: /membership/Login.aspx
User host address: 127.0.0.1
User:
Is authenticated: False
Authentication Type:
Thread account name: DEVELOMPMENT-CO\ASPNET

Thread information:
Thread ID: 1
Thread account name: DEVELOMPMENT-CO\ASPNET
Is impersonating: False
Stack trace: at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)
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.OpenLoginEnlist(SqlConnection owningObject, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance)
at System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance)
at System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection)
at System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options)
at System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject)
at System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject)
at System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject)
at System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection)
at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory)
at System.Data.SqlClient.SqlConnection.Open()
at System.Web.DataAccess.SqlConnectionHolder.Open(HttpContext context, Boolean revertImpersonate)
at System.Web.DataAccess.SqlConnectionHelper.GetConnection(String connectionString, Boolean revertImpersonation)
at System.Web.Security.SqlMembershipProvider.GetPasswordWithFormat(String username, Boolean updateLastLoginActivityDate, Int32& status, String& password, Int32& passwordFormat, String& passwordSalt, Int32& failedPasswordAttemptCount, Int32& failedPasswordAnswerAttemptCount, Boolean& isApproved, DateTime& lastLoginDate, DateTime& lastActivityDate)
at System.Web.Security.SqlMembershipProvider.CheckPassword(String username, String password, Boolean updateLastLoginActivityDate, Boolean failIfNotApproved, String& salt, Int32& passwordFormat)
at System.Web.Security.SqlMembershipProvider.CheckPassword(String username, String password, Boolean updateLastLoginActivityDate, Boolean failIfNotApproved)
at System.Web.Security.SqlMembershipProvider.ValidateUser(String username, String password)
at System.Web.UI.WebControls.Login.OnAuthenticate(AuthenticateEventArgs e)
at System.Web.UI.WebControls.Login.AttemptLogin()
at System.Web.UI.WebControls.Login.OnBubbleEvent(Object source, EventArgs e)
at System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args)
at System.Web.UI.WebControls.Button.OnCommand(CommandEventArgs e)
at System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument)
at System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument)
at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument)
at System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData)
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

Custom event details:

For more information, see Help and Support Center athttp://go.microsoft.com/fwlink/events.asp.

This is the connection string:

<addname="Membership"connectionString="Data Source=.\SQLEXPRESS;Integrated Security=True;User Instance=True;AttachDbFilename=|DataDirectory|aspnetdb.mdf;"

providerName="System.Data.SqlClient" />

</connectionStrings>

Thanks for any responses.

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More information about this error. My web site works fine when I run it on this built in Asp.net Developer Server that comes with Visual Web Developer. I don't know why it doesn't work on my IIS 5.1 Server.

Any suggestions?

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Hi,

The following URL has some explainations and things to try with this error

http://forums.microsoft.com/msdn/showpost.aspx?postid=98346&siteid=1

Hope that helps,

Lan

Wednesday, March 7, 2012

An attempt to attach an auto-named database for file failed

An attempt to attach an auto-named database for file C:\Inetpub\wwwroot\membership\App_Data\aspnetdb.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share.

Server Error in '/membership' Application.

An attempt to attach an auto-named database for file C:\Inetpub\wwwroot\membership\App_Data\aspnetdb.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share.

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