private void transactionDetailsToolStripMenuItem_Click(object sender, EventArgs e)
        {
            TransactionDetailsForm td = new TransactionDetailsForm(accno);



            td.Show();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrWhiteSpace(username.Text))
            {
                MessageBox.Show("Username cannot be empty");
            }
            else
            {
                OleDbConnection connection = new OleDbConnection();
                connection.ConnectionString = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=F:\DesignLab\Final Project\database new\databasenew.accdb";

                OleDbDataAdapter ad2  = new OleDbDataAdapter("select * from signup where username='******';", connection);
                DataTable        dtb2 = new DataTable();
                ad2.Fill(dtb2);


                if (dtb2.Rows.Count <= 0)
                {
                    MessageBox.Show("Username does not exist!");
                    return;
                }

                else
                {
                    int    accno = 0;
                    string text  = "select accno from signup where [username]='" + username.Text.Trim() + "'";
                    connection.Open();

                    OleDbCommand command = new OleDbCommand(text, connection);

                    OleDbDataReader reader = command.ExecuteReader();
                    while (reader.Read())
                    {
                        accno = Convert.ToInt32(reader.GetValue(0));
                    }
                    connection.Close();
                    TransactionDetailsForm tdf = new TransactionDetailsForm(accno.ToString());
                    tdf.Show();
                    this.Close();
                }
            }
        }