// Populate DataGridView with appointment data
public void displayAppointments()
{
// Clear DataTable of any prior information
appointmentsDT.Clear();
String query = "";
// Obtain selected date from MonthCalendar
DateTime selectedDate = appointmentCalendar.SelectionRange.Start.ToUniversalTime();
// Determine sunday and saturday for week view, convert to universal time for accurate comparison to DB values
DateTime sunday = selectedDate.AddDays(-(int)selectedDate.DayOfWeek).ToUniversalTime();
DateTime saturday = selectedDate.AddDays(-(int)selectedDate.DayOfWeek + (int)DayOfWeek.Saturday).ToUniversalTime();
// Check which view is selected and query data accordingly
if (dgvViewMonthRadioButton.Checked)
{
query = $"SELECT a.appointmentId AS ID, c.customerName AS 'Customer Name', a.title AS Title, a.start AS Start, a.end AS End FROM appointment AS a, customer AS c WHERE c.customerId = a.customerId AND MONTH(a.start) = '{appointmentCalendar.SelectionStart.Month}' AND YEAR(a.start) = '{appointmentCalendar.SelectionStart.Year}' AND a.createdBy = '{DataInterface.getCurrentUserName()}' ORDER BY a.start";
}
else if (dgvViewWeekRadioButton.Checked)
{
query = $"SELECT a.appointmentId AS ID, c.customerName AS 'Customer Name', a.title AS Title, a.start AS Start, a.end AS End FROM appointment AS a, customer AS c WHERE c.customerId = a.customerId AND a.start >= '{sunday.ToString("yyyy-MM-dd hh:MM:ss")}' - INTERVAL 3 MINUTE AND a.start < '{saturday.AddHours(24).ToString("yyyy-MM-dd hh:MM:ss")}' - INTERVAL 3 MINUTE AND a.createdBy = '{DataInterface.getCurrentUserName()}' ORDER BY a.start";
}
else if (dgvViewDayRadioButton.Checked)
{
query = $"SELECT a.appointmentId AS ID, c.customerName AS 'Customer Name', a.title AS Title, a.start AS Start, a.end AS End FROM appointment AS a, customer AS c WHERE c.customerId = a.customerId AND a.start >= '{selectedDate.ToString("yyyy-MM-dd hh:MM:ss")}' - INTERVAL 3 MINUTE AND a.start < '{selectedDate.AddHours(24).ToString("yyyy-MM-dd hh:MM:ss")}' - INTERVAL 3 MINUTE AND a.createdBy = '{DataInterface.getCurrentUserName()}' ORDER BY a.start";
}
// Execute query and fill DataTable
DataInterface.DBOpen();
MySqlDataAdapter adp = new MySqlDataAdapter(query, DataInterface.conn);
MySqlCommandBuilder cmd = new MySqlCommandBuilder(adp);
adp.Fill(appointmentsDT);
// Convert start and end times to local time
DataInterface.convertToLocal(appointmentsDT, "Start");
DataInterface.convertToLocal(appointmentsDT, "End");
// Set DataSource for DataGridView to display data within DataTable
appointmentsDGV.DataSource = appointmentsDT;
appointmentsDGV.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill;
DataInterface.DBClose();
}