Error: “The query builder failed. Cannot open user default database. Login failed. Login failed for user <User Name>”


I'm using Visual Basic Express 2010 and SQL Express 2008 in Windows
XP.


At first I couldn't add a datasource (the .mdf file
for the database) because of a "Operating system error 32" which I
seemed to have resolved by giving myself full permissions for .mdf
file (by right clicking on the file and going into properties and then
Security) and restarting the SQL SERVER (SQLEXPRESS) service.

/>

The dataset for the database is in my solution explorer but when
I right click on a table adapter to add a query and attempt to open up
the query builder, I get the error in the title above.

I'm using Visual Basic Express 2010 and SQL Express 2008 in Windows
XP.


At first I couldn't add a datasource (the .mdf file
for the database) because of a "Operating system error 32" which I
seemed to have resolved by giving myself full permissions for .mdf
file (by right clicking on the file and going into properties and then
Security) and restarting the SQL SERVER (SQLEXPRESS) service.

/>

The dataset for the database is in my solution explorer but when
I right click on a table adapter to add a query and attempt to open up
the query builder, I get the error in the title above.

Programming Languages

As I see several similar issues that I am facing, I have a bit
different problem. My connection string is


Data
Source=(LocalDB)v11.0;AttachDbFilename=C:inetpubwwwrootaspnet_newApp_Datadatabase.mdf;Integrated
Security=True;Connect Timeout=30"
providerName="System.Data.SqlClient"


My
application is running under .Net Framework 4.0 and managed pipelined
mode is classic and identity is ApplicationPoolIdentity

/>

The website is running perfectly but when I open visual studio
and expand my database to add/edit tables, then the moment visual
studio establishes connection with database, the IIS stops working and
shows me this

Programming Languages

I created a web application but when trying to connect the DB I am
getting this error


Cannot open database "DBName" requested
by the login. The login failed.
Login failed for user
'MachineNameUser'.


I also tried adding that this user
manually but it give error that this login already exist with
different username..but it not shows in DB permission list.

/>

Any ideas?


Thanks

Databases

I'm using this for connection to SQL Server 2005 [Windows
authentication]


<add key="ConnectionString"
value="Data Source=MALIKsqlexpress;Initial
Catalog=gainpeace;Integrated Security=SSPI"></add> />

but it generates an error


Cannot open
database "gainpeace"
requested by the login. The login

failed. Login failed for user
'MALIKASPNET'.


plz
guide me how to resolved this issue ...!

Programming Languages

I have a SQL Server Express database connection problem.

/>

I have WPF application which connects to my database using
LINQ-to-SQL .


When I run the application in debug mode F5,
the application works fine but when I run it CTRL+F5 I get connection
to SQL error


Cannot open Database MyDB requested by the
login.The login failed.Login failed for user "myUser"


I
have checked in Google and tried all the suggested solutions but
nothing helped...:(


Can anyone help me?
thanks....

Databases

SQLSEXPRESS service IS running!!


I have I program I
wrote some time ago and it works. It was written in MS Visual Studio
with local MDF file.


How is it possible to edit this file
from Microsoft SQL Server Management Studio? I don't see this file in
the list of globally connected databases.


If I try to
attach this file with Visual Studio Wizard, I get message that such
database already exists, but when I set arbitrary logical name, I get
sharing violation.


How to reach MDF file?


EDIT
1


Now I found that my program also stopped to work.

/>

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