GreatHomeChildcare-2/frmGuardianCrud.cs

258 lines
9.7 KiB
C#
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using System;
using System.ComponentModel;
using System.Text.RegularExpressions;
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using System.Windows.Forms;
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using GreatHomeChildcare.Models;
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namespace GreatHomeChildcare
{
public partial class frmGuardianCrud : Form
{
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//global variables
SqliteDataAccess SqliteDataAccess = new SqliteDataAccess();
public static Guardian guardian = new Guardian();
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public static string strPin = String.Empty;
enum IsAdmin
{
No = 0,
Yes = 1
}
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public frmGuardianCrud()
{
InitializeComponent();
}
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/* Load up the form with an existing guardian
* if the "edit guardian" button was pressed
* on the child crud form.
*/
private void frmGuardianCrud_Load(object sender, EventArgs e)
{
int guardian_id = 0;
IsAdmin adminOut;
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FillIsAdminComboBox();
/* If it's the first time run of this program
* then setup the initial admin user.
*/
if(SqliteDataAccess.GetNumAdmins() <= 0)
{
isAdminComboBox.SelectedItem = IsAdmin.Yes;
isAdminComboBox.Enabled = false;
btnCancelClose.Enabled = false;
}
else
{
guardian_id = frmChildCrud.guardian_id;
}
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if (guardian_id > 0)
{
guardian = SqliteDataAccess.GetGuardianById(guardian_id);
idNumericUpDown.Value = guardian.id;
lastNameTextBox.Text = guardian.LastName;
firstNameTextBox.Text = guardian.FirstName;
phoneNumberNumericUpDown.Value = guardian.PhoneNumber;
emailAddressTextBox.Text = guardian.EmailAddress;
strPin = guardian.PinNumber.ToString();
tbPinNumber.Text = "****";
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//Load the isAdmin combo box based from enum value.
//ref: chuck costarella
Enum.TryParse<IsAdmin>(guardian.isAdmin.ToString(), out adminOut);
isAdminComboBox.SelectedItem = adminOut;
}
}
// Fill the IsAdmin combo box with our enum.
private void FillIsAdminComboBox()
{
isAdminComboBox.Items.Add(IsAdmin.No);
isAdminComboBox.Items.Add(IsAdmin.Yes);
isAdminComboBox.SelectedItem = IsAdmin.No;
}
//Close the form without saving changes.
private void btnCancelClose_Click(object sender, EventArgs e)
{
Close();
}
/* Save a new guardian or update
* an existing guardian.
* INPUT: Data from form.
* OUTPUT: data to sql database.
*/
private void btnSaveClose_Click(object sender, EventArgs e)
{
Guardian checkExistingGuardian = new Guardian();
int num_admins;
this.Validate();
this.ValidateChildren();
// Check to see if any control is in error.
foreach (Control c in errorProvider1.ContainerControl.Controls)
{
if (errorProvider1.GetError(c) != "")
{
MessageBox.Show("Guardian not saved due to errors on the form!", "Great Home Childcare", MessageBoxButtons.OK, MessageBoxIcon.None);
return;
}
}
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// validate pin
if(strPin.Length < 4)
{
MessageBox.Show("Please enter a 4-digit pin number.", "Great Home Childcare", MessageBoxButtons.OK, MessageBoxIcon.None);
return;
}
checkExistingGuardian = SqliteDataAccess.GetGuardianByPin(Int32.Parse(strPin));
//If this is a new guardian, check to see if that pin is in use.
if(idNumericUpDown.Value == 0 && checkExistingGuardian != null)
{
MessageBox.Show("Please choose a different PIN number.", "Great Home Childcare", MessageBoxButtons.OK, MessageBoxIcon.None);
return;
}
guardian.id = Int32.Parse(idNumericUpDown.Value.ToString());
guardian.LastName = ImageWrangler.CapitalizeFirstLetter(lastNameTextBox.Text);
guardian.FirstName = ImageWrangler.CapitalizeFirstLetter(firstNameTextBox.Text);
guardian.PhoneNumber = long.Parse(phoneNumberNumericUpDown.Value.ToString());
guardian.EmailAddress = emailAddressTextBox.Text;
guardian.PinNumber = Int32.Parse(strPin);
guardian.isAdmin = (int)isAdminComboBox.SelectedItem;
if(guardian.id == 0) // new guardian
{
SqliteDataAccess.InsertNewGuardian(guardian);
}
else
{
//Check to see if no admins will be left over.
num_admins = SqliteDataAccess.GetNumAdmins();
num_admins--;
if ((IsAdmin)isAdminComboBox.SelectedItem == IsAdmin.No
&& num_admins <= 0)
{
MessageBox.Show("You are removing the last known admin, that would break this program.\n\rThe IsAdmin selection has changed to YES, please re-check the form entry then resubmit.", "Great Home Childcare", MessageBoxButtons.OK, MessageBoxIcon.None);
isAdminComboBox.SelectedItem = IsAdmin.Yes;
return;
}
SqliteDataAccess.UpdateGuardian(guardian);
}
Close();
}
// Basic input validation on a string given a textbox control
// ensures only values a-z, with length two or greater.
private void String_TextBox_Validating(object sender, CancelEventArgs e)
{
TextBox tb = (TextBox)sender;
if (!Regex.IsMatch(tb.Text, "[A-Za-z]{2,}"))
errorProvider1.SetError(tb, "Enter a value a-z only of length two or longer.");
else
errorProvider1.SetError(tb, "");
}
/* Does not really check to see if it is a valid phone number
* since the phone companies introduce new area codes all the damn time.
* Only checks to see the most likely case that the user of the program
* has left the phone number value as the default minimum value.
*/
private void phoneNumberNumericUpDown_Validating(object sender, CancelEventArgs e)
{
if (phoneNumberNumericUpDown.Value == phoneNumberNumericUpDown.Minimum
|| phoneNumberNumericUpDown.Value == phoneNumberNumericUpDown.Maximum)
{ errorProvider1.SetError(phoneNumberNumericUpDown, "Type in a valid phone number"); }
else
{ errorProvider1.SetError(phoneNumberNumericUpDown, ""); }
}
//Validates any given combobox to ensure an item is selected.
private void isAdminComboBox_Validating(object sender, CancelEventArgs e)
{
ComboBox cb = (ComboBox)sender;
if (cb.SelectedIndex < 0)
{ errorProvider1.SetError(cb, "Select an item."); }
else
{ errorProvider1.SetError(cb, ""); }
}
//validate a 4-digit pin number was entered.
private void tbPinNumber_Validating(object sender, CancelEventArgs e)
{
if(tbPinNumber.TextLength != 4)
{ errorProvider1.SetError(tbPinNumber, "Please enter a 4-digit PIN."); }
else
{ errorProvider1.SetError(tbPinNumber, ""); }
}
/* Checks to see if provided email address is valid
* by matching against an email address regex i stole from the interweb.
*/
private void emailAddressTextBox_Validating(object sender, CancelEventArgs e)
{
//email address regex
//^[a-zA-Z0-9._-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,5}$
if (!Regex.IsMatch(emailAddressTextBox.Text, @"^[a-zA-Z0-9._-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,5}$"))
errorProvider1.SetError(emailAddressTextBox, "Enter a valid email address: user@domain.com");
else
errorProvider1.SetError(emailAddressTextBox, "");
}
private void btnNumButton_Click(object sender, EventArgs e)
{
//Don't allow a PIN length longer than 4 digits.
if (strPin.Length >= 4)
return;
//to the passed in sender source and cast it to a Button
Button button = (Button)sender;
strPin += button.Text;
tbPinNumber.Text += button.Text;
}
//Prevents typing in the pin number box.
private void tbPinNumber_KeyPress(object sender, KeyPressEventArgs e)
{
//Don't allow typing in the control.
e.Handled = true;
}
/*Clears the pin entry completely,
* resetting the hidden variable strPin,
* and clearing the text box
*/
private void btnCE_Click(object sender, EventArgs e)
{
strPin = String.Empty;
tbPinNumber.Text = String.Empty;
}
// Deletes the last number entered into the pinpad.
private void btnBack_Click(object sender, EventArgs e)
{
//If there is nothing in the display, do not attempt
//to remove any digits, or the program will crash.
if (strPin.Length == 0)
return;
//Assign the text in the display using a substring
//of whatever the text is, subtracting the length by 1.
//This effectively 'strips' the last digit from the display string.
tbPinNumber.Text = tbPinNumber.Text.Substring(0, tbPinNumber.Text.Length - 1);
strPin = strPin.Substring(0, strPin.Length - 1);
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}
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}
}