/// <summary>
/// Method to update an existing session in the database
/// </summary>
private void UpdateSession()
{
// Add new session to the database and save changes
try
{
using (var context = new db_sft_2172Entities())
{
// Run query and pull matching session from database
var sessionQuery = from session in context.CoachSessions
where session.SessionID.Equals(this.CurrentSession.SessionID)
select session;
if (sessionQuery.Any())
{
CoachSession foundSession = sessionQuery.FirstOrDefault();
// Update database records
foundSession.DayID = this.CurrentSession.DayID;
foundSession.StartTime = this.CurrentSession.StartTime;
foundSession.EndTime = this.CurrentSession.EndTime;
foundSession.CoachID = this.CurrentSession.CoachID;
foundSession.Active = this.CurrentSession.Active;
// Save changes to database
context.SaveChanges();
}
else
{
MessageBox.Show(
@"Sorry, the desired session was not found in the database."
+ Environment.NewLine + @"Please try again later or contact an administrator for assistance.");
}
}
}
catch (DbUpdateException dbUEx)
{
MessageBox.Show(dbUEx.InnerException != null ? dbUEx.InnerException.Message : dbUEx.Message);
return;
}
catch (SqlException sqlEx)
{
MessageBox.Show(sqlEx.InnerException != null ? sqlEx.InnerException.Message : sqlEx.Message);
return;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
return;
}
MessageBox.Show(@"Save completed...Session updated successfully!");
}
/// <summary>
/// A method to remove the selected schedule record when the button is clicked
/// </summary>
/// <param name="sender">The parameter is not used.</param>
/// <param name="e">The parameter is not used.</param>
private void BtnRemove_Click(object sender, EventArgs e)
{
// Determine which row is selected
int selectedSessionId = Convert.ToInt32(this.dataGridViewSchedule.SelectedRows[0].Cells["SessionID"].Value.ToString());
// Confirm whether user truly wants to remove this scheduled block
DialogResult confirmRemove = MessageBox.Show(
@"Are you sure you want to remove this scheduled time?",
@"Confirm delete",
MessageBoxButtons.YesNo,
MessageBoxIcon.Question);
// If yes, remove the record
if (confirmRemove.Equals(DialogResult.Yes))
{
var session = new CoachSession {
SessionID = selectedSessionId
};
try
{
using (var context = new db_sft_2172Entities())
{
context.CoachSessions.Attach(session);
context.CoachSessions.Remove(session);
context.SaveChanges();
MessageBox.Show(@"Delete successful!");
this.PopulateScheduleGrid();
}
}
catch (DbUpdateException dbUEx)
{
MessageBox.Show(dbUEx.InnerException != null ? dbUEx.InnerException.Message : dbUEx.Message);
}
catch (SqlException sqlEx)
{
MessageBox.Show(sqlEx.InnerException != null ? sqlEx.InnerException.Message : sqlEx.Message);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
}
/// <summary>
/// Method to query the database and display data for the desired session
/// </summary>
private void LoadSessionData()
{
try
{
using (var context = new db_sft_2172Entities())
{
var sessionQuery = from session in context.CoachSessions
where session.SessionID.Equals(this.CurrentSession.SessionID)
select session;
if (sessionQuery.Any())
{
this.CurrentSession = sessionQuery.FirstOrDefault();
}
else
{
MessageBox.Show(@"Sorry, could not load session data from the database. Please try again later.");
this.Close();
}
}
}
catch (SqlException sqlEx)
{
MessageBox.Show(sqlEx.InnerException != null ? sqlEx.InnerException.Message : sqlEx.Message);
return;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
return;
}
// Populate combo boxes with current session data
this.cbxCoach.SelectedValue = this.CurrentSession.CoachID;
this.cbxDay.SelectedValue = this.CurrentSession.DayID;
this.cbxStartTime.SelectedValue = this.CurrentSession.StartTime;
this.cbxEndTime.SelectedValue = this.CurrentSession.EndTime;
this.cbxActive.SelectedIndex = this.CurrentSession.Active ? 0 : 1;
}
/// <summary>
/// Event handler to save session data and close form when the Save button is clicked
/// </summary>
/// <param name="sender">The parameter is not used.</param>
/// <param name="e">The parameter is not used.</param>
private void BtnSaveClick(object sender, EventArgs e)
{
if (this.CurrentSession == null)
{
this.CurrentSession = new CoachSession();
}
// Get data from form and insert into current Session object
this.CurrentSession.DayID = this.cbxDay.SelectedValue.ToString();
this.CurrentSession.CoachID = this.cbxCoach.SelectedValue.ToString();
// Get data from form and insert into current Availability object
this.CurrentSession.DayID = this.cbxDay.SelectedValue.ToString();
// Get selected start time as a TimeSpan
Time selectedStartTime = (Time)this.cbxStartTime.SelectedItem;
this.CurrentSession.StartTime = selectedStartTime.Time1;
// Get selected end time as a TimeSpan
Time selectedEndTime = (Time)this.cbxEndTime.SelectedItem;
this.CurrentSession.EndTime = selectedEndTime.Time1;
// Update active status based on selected value
this.CurrentSession.Active = this.cbxActive.SelectedIndex == 0;
// Verify that the selected coach has availablility on the desired day/time
try
{
using (var context = new db_sft_2172Entities())
{
var availableCoachSessions = from coachAvailability in context.CoachAvailabilities
where
coachAvailability.CoachID.Equals(this.CurrentSession.CoachID) &&
coachAvailability.DayID.Equals(this.CurrentSession.DayID) &&
coachAvailability.StartTime <= this.CurrentSession.StartTime &&
coachAvailability.EndTime >= this.CurrentSession.EndTime
select coachAvailability;
if (availableCoachSessions.Any())
{
// Call appropriate method to add or update session data
if (this.SessionId == -1)
{
this.AddNewSession();
}
else
{
this.UpdateSession();
}
}
else
{
MessageBox.Show(
@"Sorry, the desired coach is not available for the selected day/time."
+ Environment.NewLine + @"Please select another combination!");
return;
}
}
}
catch (SqlException sqlEx)
{
MessageBox.Show(sqlEx.InnerException != null ? sqlEx.InnerException.Message : sqlEx.Message);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
// Close form once finished
this.Close();
}
