0

I am trying to create a backup and restore function in my application. Right now, I have this piece of code.

Dim destdir As String = "C:\Desktop\Backup Database" Dim dbname As String = "dbOffense" 'Metioned here your database name Dim con As New SqlConnection(constr) Dim cmd As New SqlCommand Dim da As New SqlDataAdapter Dim dt As New DataTable() 'Check that directory already there otherwise create If Not System.IO.Directory.Exists(destdir) Then System.IO.Directory.CreateDirectory("C:\Desktop\Backup Database") End If Try 'Open connection con.Open() 'query to take backup database cmd = New SqlCommand("backup database " + dbname + " to disk='" + destdir + "\\" + DateTime.Now.ToString("ddMMyyyy_HHmmss") + ".Bak'", con) cmd.ExecuteNonQuery() 'Close connection con.Close() MessageBox.Show("Backup database successfully") Catch ex As Exception MessageBox.Show(ex.Message) End Try

And also my connection string:

<add name="ConString" connectionString="Data Source=(LocalDB)\MSSQLLocalDB;AttachDbFilename=|DataDirectory|\dbOffense.mdf;Integrated Security=True;Connect Timeout=30;" providerName="System.Data.SqlClient" />

The .mdf file is in the project folder and it is set to Copy If Newer if this is of any help.

Whenever I click the backup function in my application, an error occurs. It says

dbOffense does not exist

With that, I tried adding database=dbOffense to the connection string, but it says

Unable to attach the .mdf file as database dbOffense because the .mdf file copy in the bin/Debug folder is in use.

From there I am stuck. What should I do?

Improve this question
2
  • Why not just copy the database files when backing up and restoring? You can still specify the files names when copying. Commented Jun 13, 2017 at 13:00
  • I was planning on making it a .bak file instead of copying a database file really. If I were to do that, how does one do that? Commented Jun 13, 2017 at 13:47

1 Answer 1

Reset to default
1

To Copy a file (The code below allows an existing file to be overwritten):

System.IO.File.Copy(existing file path here, destination file path here, True)

Remember, you can give the file any file extension you want such as: 

System.IO.File.Copy(C:\abc.accdb, C:\Backup\abc.db123, True)

Also, Have a look at this:

Copy Data from a table in one Database to another separate database

Improve this answer
Sign up to request clarification or add additional context in comments.

1 Comment

I got an error saying that the database is in use. How should I stop the process using VB.NET? MSSQLLocalDb by the way.

Start asking to get answers

Find the answer to your question by asking.

Ask question

Explore related questions

See similar questions with these tags.