Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Data.OleDb.OleDbException: Could not use ''; file already in use.
Source Error:
Line 19: clsdb db = new clsdb(Convert.ToString(Session["sql"]));
Line 20: dbcon = db.connectdb();
Line 21: dbcon.Open();
Line 22: String sql = "select * from account where username = '" + tb_user.Text + "' and password = '" + tb_pass.Text + "'";
Line 23: System.Data.OleDb.OleDbDataAdapter da;