//RentedMovie Gridview Bind Data here
        private void RentedMovieGridData()
        {
            DataTable ds = new RentedMOvies().ShowAllRentedMovies();

            RentalDataGridView.DataSource = ds;
            RentalDataGridView.AutoResizeColumns(DataGridViewAutoSizeColumnsMode.AllCells);
        }
 //Get Customers who borrow most movies
 private void button3_Click(object sender, EventArgs e)
 {
     try
     {
         TabControlSystem.SelectedTab = TabControlSystem.TabPages["RentedMovies"];
         DataTable dt = new RentedMOvies().CustBorrowMostMovies();
         RentalDataGridView.DataSource = dt;
         RentalDataGridView.AutoResizeColumns(DataGridViewAutoSizeColumnsMode.AllCells);
     }
     catch (Exception ex)
     {
         MessageBox.Show(ex.Message);
     }
 }
        //Display all rented movies from customer
        private void DropDownAllCust_SelectedIndexChanged(object sender, EventArgs e)
        {
            try
            {
                int customerId = int.Parse(DropDownAllCust.SelectedValue.ToString());
                if (customerId > 0)
                {
                    ddlRentedMovies.Enabled = true;
                    DataTable dsRented = new RentedMOvies().ShowRentedMoviesDDL(customerId);

                    if (dsRented.Rows.Count > 0)
                    {
                        DataRow row = dsRented.NewRow();
                        row[0] = 0;
                        row[1] = "Select...";
                        dsRented.Rows.InsertAt(row, 0); // add item at INDEX = 0;

                        ddlRentedMovies.DisplayMember = "Title";
                        ddlRentedMovies.ValueMember   = "MovieId";
                        ddlRentedMovies.DataSource    = dsRented;
                    }
                    else
                    {
                        ddlRentedMovies.Enabled = false;
                    }
                }
                else
                {
                    ddlRentedMovies.Enabled = false;
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }