"exclusive access could not be obtained.." while restoring

Hello,
I am using MSDE with my application and providing our users UI to backup/res
tore the database. My app has just 1 database and 1 login mapped to 1 user
(MyAppUser). Backup and restore functionality is using inline sql commands.
Backup works fine with so
mething like this:
Private Sub Backup()
Dim cn As New SqlConnection(MyConnectionString)
Try
cn.Open()
Dim cm As New SqlCommand
With cm
.Connection = cn
.CommandType = CommandType.Text
.CommandText = "BACKUP DATABASE MyDB TO DISK = 'D:\Backup\a.bak' WITH INIT"
.ExecuteNonQuery()
End With
MsgBox("Database backed up successfully!")
Catch ex As Exception
MsgBox(ex.Message)
Finally
cn.Close()
End Try
End Sub
but when I do restore using something like this:
Private Sub Restore()
Dim cn As New SqlConnection(MyConnectionString)
Try
cn.Open()
Dim cm As New SqlCommand
With cm
.Connection = cn
.CommandType = CommandType.Text
.CommandText = "RESTORE DATABASE MyDB FROM DISK = 'D:\Backup\a.bak' WITH RE
COVERY"
.ExecuteNonQuery()
End With
MsgBox("Database restored successfully!")
Catch ex As Exception
MsgBox(ex.Message)
Finally
cn.Close()
End Try
End Sub
I get the "exclusive access could not be obtained.. .. database is in use" e
rror message.
I did "Use Master" in query analyser and ran the same restore sql command an
d it worked fine. I do not know how to use "Use master" here in ado.net. I
know it has something to do with sp_Who but not sure how the syntax will fi
t in.
Note MyConnectionString is something like:
"data source=(local)\MyCompany;initial catalog=MyDB;User ID = MyAppUser ; Pa
ssword = MyPassword"
Please help. What should I do so that this works in my vb.net app.You can use cn.ChangeDatabase("master") to change database
If you are restoring over an existing database you will also need specify
WITH REPLACE.
HTH
Jasper Smith (SQL Server MVP)
I support PASS - the definitive, global
community for SQL Server professionals -
http://www.sqlpass.org
"newbie" <anonymous@.discussions.microsoft.com> wrote in message
news:C800D8D0-0D15-4352-8545-9CA47C9B4710@.microsoft.com...
> Hello,
> I am using MSDE with my application and providing our users UI to
backup/restore the database. My app has just 1 database and 1 login mapped
to 1 user (MyAppUser). Backup and restore functionality is using inline sql
commands. Backup works fine with something like this:
> Private Sub Backup()
> Dim cn As New SqlConnection(MyConnectionString)
> Try
> cn.Open()
> Dim cm As New SqlCommand
> With cm
> .Connection = cn
> .CommandType = CommandType.Text
> .CommandText = "BACKUP DATABASE MyDB TO DISK =
'D:\Backup\a.bak' WITH INIT"
> .ExecuteNonQuery()
> End With
> MsgBox("Database backed up successfully!")
> Catch ex As Exception
> MsgBox(ex.Message)
> Finally
> cn.Close()
> End Try
> End Sub
> but when I do restore using something like this:
> Private Sub Restore()
> Dim cn As New SqlConnection(MyConnectionString)
> Try
> cn.Open()
> Dim cm As New SqlCommand
> With cm
> .Connection = cn
> .CommandType = CommandType.Text
> .CommandText = "RESTORE DATABASE MyDB FROM DISK =
'D:\Backup\a.bak' WITH RECOVERY"
> .ExecuteNonQuery()
> End With
> MsgBox("Database restored successfully!")
> Catch ex As Exception
> MsgBox(ex.Message)
> Finally
> cn.Close()
> End Try
> End Sub
> I get the "exclusive access could not be obtained.. .. database is in use"
error message.
> I did "Use Master" in query analyser and ran the same restore sql command
and it worked fine. I do not know how to use "Use master" here in ado.net.
I know it has something to do with sp_Who but not sure how the syntax will
fit in.
> Note MyConnectionString is something like:
> "data source=(local)\MyCompany;initial catalog=MyDB;User ID = MyAppUser ;
Password = MyPassword"
> Please help. What should I do so that this works in my vb.net app.