Problem With Data Refreshing After Insert Or Update Statement

Dear All,

Im using VS2008, visual basic and SQL Server express.

General questions please: Is it necessary, to issue some sort of command, to 'commit' data to a SQL express database after a INSERT or UPDATE sql command?

I'm getting strange behavior where the data is not refreshed unless i exit my app and re-enter. In other words, i can run a sql command , the data is apparantly saved (because i get no errors) then if i refresh a data set or do a sql select query the data that i expect to return is not there.

Im fairly new to SQL express (and SQL server generally) so i dont know if its my coding or i need to switch some 'feature'
on/off or not.

I hope thats clear

Also, could someone point me to documentation that explains each parameter in the connection string

Many Thanks

Chris Anderson


My code is:


ConnectionString = "Data Source=.SQLEXPRESS;AttachDbFilename=C:myfile.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True"

Connection = New SqlConnection

Connection.ConnectionString = ConnectionString

Connection.Open()
'''''''''''''''''the above code is done at the start of my application


'''''''this code below called during application many times


dim sql as string = "my sql string here"

Dim cmd As SqlCommand = Nothing

cmd = New SqlCommand(sql, Connection)






Try

cmd.ExecuteNonQuery()

Catch err As SqlException

MessageBox.Show(err.Message.ToString())

MessageBox.Show(sql, "SQL ERROR: ", MessageBoxButtons.OK, MessageBoxIcon.Error)

End Try



cmd.Dispose()