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----------------------------------------------------------- From: Pithvi Message 6 in Discussion Hi Satheesh, This may help you in comming to a conclusion regarding your first question (pessimistic Locking) // With SQL Server DataSet ds = new DataSet(); SqlConnection conn = new SqlConnection( "server=localhost;uid=sa;database=pubs"); conn.Open(); SqlTransaction tx = conn.BeginTransaction( IsolationLevel.Serializable); // lock as little as possible SqlCommand cmd = new SqlCommand( "select * from authors where au_id = '172-32-1176'", conn, tx); SqlDataAdapter da = new SqlDataAdapter(cmd); da.Fill(ds, "authors"); // rows locked here in the database // rows can be read by others but not updated ds.Tables[0].Rows[0][2] = "Fred"; // CommandBuilder uses same connection SqlCommandBuilder bld = new SqlCommandBuilder(da); // lock conversion deadlocks possible on update // SQL Server will detect and rollback one tx eventually da.Update(ds, "authors"); tx.Commit(); // rows unlocked here da.Dispose(); conn.Close(); cheers Prithvi ----------------------------------------------------------- To stop getting this e-mail, or change how often it arrives, go to your E-mail Settings. http://groups.msn.com/bdotnet/_emailsettings.msnw Need help? If you've forgotten your password, please go to Passport Member Services. http://groups.msn.com/_passportredir.msnw?ppmprop=help For other questions or feedback, go to our Contact Us page. http://groups.msn.com/contact If you do not want to receive future e-mail from this MSN group, or if you received this message by mistake, please click the "Remove" link below. On the pre-addressed e-mail message that opens, simply click "Send". Your e-mail address will be deleted from this group's mailing list. mailto:[EMAIL PROTECTED]
