// Customer Arrays stored into binary file as program is closing down.
public void customerSaveFile()
{
if (File.Exists("customers.dat"))
{
using (BinaryWriter bw = new BinaryWriter(File.Open("customers.dat", FileMode.OpenOrCreate)))
{
customerNullPointer = 0;
for (int i = 0; i < customerNullPointer + 1; i++)
{
if (customerArray[i] != null)
{
// Class called from current array index and saved into binary data. Loops around for each index.
CustomerClass a = customerArray[i];
bw.Write(a.gsCustomerID);
bw.Write(a.gsCusName);
bw.Write(a.gsCusCity);
bw.Write(a.gsCusCountry);
customerNullPointer++;
}
else
{
break;
}
}
}
}
}
// Customer Loading not yet implemented.
public void customerLoadFile()
{
try
{
// Binery file is checked and opened. The information is read and added to the list.
if (File.Exists("customers.dat"))
{
using (BinaryReader br = new BinaryReader(File.Open("customers.dat",
FileMode.Open)))
{
//To avoid Null errors the fileLength is defined and assigned as an Integer.
int fileLength = (int)br.BaseStream.Length / 4;
//NullPointer set to zero --- VERY IMPORTANT
customerNullPointer = 0;
for (int i = 0; i < fileLength; i++)
{
CustomerClass a = new CustomerClass();
a.gsCustomerID = br.ReadString();
a.gsCusName = br.ReadString();
a.gsCusCity = br.ReadString();
a.gsCusCountry = br.ReadString();
customerArray[customerNullPointer] = a;
customerDisplayBox.Items.Add(customerArray[i].gsCustomerID + " - " + customerArray[i].gsCusName + " - " + customerArray[i].gsCusCity + " - " + customerArray[i].gsCusCountry);
//To ensure clear viewing the arrays are loaded into a string which will be displayed in the box.
//Nullpointer extends Array to avoid out of index errors.This is why it was set to zero before.
//This program has no delete button so there was no way to reduce the array size for the load function.
customerNullPointer++;
}
}
}
else if (!(File.Exists("customers.dat")))
{
using (BinaryReader br = new BinaryReader(File.Open("customers.dat", FileMode.Create)))
{
errorMessage.Text = "Customer.dat does not currently exist.";
return;
}
}
else
{
MessageBox.Show("Error Loading File", "Check file is in the correct folder");
}
}
catch (EndOfStreamException)
{
errorMessage.Items.Clear();
errorMessage.Text = "End of Stream Exception - Customer Loader";
}
}
// Method to all User to click onto listboxes to select data for later use.
// Once Clicked all Revelevant Information is added to the Relevant Text Boxes. Question 6 Complete.
private void customerDisplayBox_SelectedIndexChanged(object sender, EventArgs e)
{
try
{
// Assigns the Current index to a temp DroneClass Instance.
CustomerClass c = customerArray[customerDisplayBox.SelectedIndex];
// All Values get pt into text boxes in the Customer Section.
customerIDTB.Text = c.gsCustomerID;
customerNameTB.Text = c.gsCusName;
customerCityTB.Text = c.gsCusCity;
customerCountryTB.Text = c.gsCusCountry;
// Customer ID Number is added to the Transaction Section.
transactionCusTB.Text = c.gsCustomerID;
}
catch (IndexOutOfRangeException)
{
errorMessage.Text = "Customer Display Box out of Index.";
}
}
//*************************** OTHER FUNCTIONALITY ***************************************
//*************************** OTHER FUNCTIONALITY ***************************************
//*************************** OTHER FUNCTIONALITY ***************************************
// Basic Bubble sort to sort arrays. Both Customer and Drone arrays are sorted here.
public void bubbleSort()
{
// To get a single method to take care of two different sorts I have used an if > else statement. (Drone sort + Customer Sort)
// The text boxes will only be filled if they are about to add.
// If the drone box is full. Do this.
if (!(string.IsNullOrEmpty(droneSNTB.Text)))
{
try
{
for (int j = 0; j < droneNullPointer; j++)
{
for (int i = 0; i < droneNullPointer; i++)
{
if (!(string.IsNullOrEmpty(droneSNTB.Text)))
{
// Uses the serial number from the Drone Class to do the CompareTo Method.
int target = droneArray[i].gsSerialNumber.CompareTo(droneArray[i + 1].gsSerialNumber);
if (target > 0)
{
DroneClass temp = droneArray[i + 1];
droneArray[i + 1] = droneArray[i];
droneArray[i] = temp;
}
else
{
errorMessage.Items.Clear();
errorMessage.Text = "Null Error Handled at Bubble Sort";
//break;
}
}
else
{
//Null Reference
//break;
}
}
}
}
catch (NullReferenceException)
{
errorMessage.Items.Clear();
errorMessage.Text = "Null Error Reference at Bubble Sort / Drone";
}
catch (IndexOutOfRangeException)
{
errorMessage.Items.Clear();
errorMessage.Text = "Index out of Range Error at Bubble Sort / Drone";
}
catch (Exception)
{
errorMessage.Items.Clear();
errorMessage.Text = "Unknown Exception at Bubble Sort / Drone";
}
}
else
{
//Null Reference
}
// If the Customer Text box is full. Do this.
if (!(string.IsNullOrEmpty(customerIDTB.Text)))
{
try
{
for (int j = 0; j < customerNullPointer; j++)
{
for (int i = 0; i < customerNullPointer; i++)
{
if (!(string.IsNullOrEmpty(customerIDTB.Text)))
{
// Uses the serial Number from the Customer Class to do the CompareTo Method.
int target = customerArray[i].gsCustomerID.CompareTo(customerArray[i + 1].gsCustomerID);
if (target > 0)
{
CustomerClass temp = customerArray[i + 1];
customerArray[i + 1] = customerArray[i];
customerArray[i] = temp;
}
else
{
errorMessage.Items.Clear();
errorMessage.Text = "Null Error Handled at Bubble Sort";
}
}
else
{
}
}
}
}
catch (NullReferenceException)
{
errorMessage.Items.Clear();
errorMessage.Text = "Null Error Reference at Bubble Sort / Customer";
}
catch (IndexOutOfRangeException)
{
errorMessage.Items.Clear();
errorMessage.Text = "Index out of Range Error at Bubble Sort / Customer";
}
catch (Exception)
{
errorMessage.Items.Clear();
errorMessage.Text = "Unknown Exception at Bubble Sort / Customer";
}
}
// Error Catch for Null values.
else
{
errorMessage.Items.Clear();
errorMessage.Text = "Unknown Exception at Bubble Sort / Customer";
}
}
// ************************* CUSTOMER FUNCTIONALITY *********************************************
// ************************* CUSTOMER FUNCTIONALITY *********************************************
// ************************* CUSTOMER FUNCTIONALITY *********************************************
// Add button to allow items within the Customer Text boxes to be loaded into the array and listbox.
private void addCustomerButton_Click(object sender, EventArgs e)
{
if (!(string.IsNullOrEmpty(customerIDTB.Text)))
{
string[] dataCheck = new string[4];
//Filling up Data Check Array for Testing.
dataCheck[0] = customerIDTB.Text;
dataCheck[1] = customerNameTB.Text;
dataCheck[2] = customerCityTB.Text;
dataCheck[3] = customerCountryTB.Text;
// Uses DataCheck Array to make sure all the boxes are full. Question 5A Complete.
for (int i = 0; i < dataCheck.Length; i++)
{
if (dataCheck[i] == "")
{
MessageBox.Show("Text Boxes are Empty", "Please Fill all the Boxes in the Form.");
customerArray[i] = null;
break;
}
else if (dataCheck[3] != "")
{
CustomerClass customer = new CustomerClass();
customer.gsCustomerID = dataCheck[0];
customer.gsCusName = dataCheck[1];
customer.gsCusCity = dataCheck[2];
customer.gsCusCountry = dataCheck[3];
customerArray[customerNullPointer] = customer;
}
else
{
errorMessage.Items.Clear();
errorMessage.Text = "Data Checking In progress";
}
}
try
{
bubbleSort();
customerDisplayBox.Items.Clear();
// Customer Array is Displayed in Text Box.
if (!(string.IsNullOrEmpty(customerIDTB.Text)))
{
for (int j = 0; j <= customerNullPointer; j++)
{
customerDisplayBox.Items.Add(customerArray[j].gsCustomerID + " - " + customerArray[j].gsCusName + " - " + customerArray[j].gsCusCity + " - " + customerArray[j].gsCusCountry);
}
}
else
{
}
clearCustomerMethod();
}
catch (NullReferenceException)
{
errorMessage.Items.Clear();
errorMessage.Text = "Null Reference at Add Customer Button.";
}
}
// Else If Statement to give user option to put in a Default Customer. Question 5B Complete.
else if (string.IsNullOrEmpty(droneSNTB.Text))
{
// Diaglog box to allow a default customer to be made.
DialogResult defaultCustomer = MessageBox.Show("Would you like to create a default customer?", "Please press Yes / No",
MessageBoxButtons.YesNo, MessageBoxIcon.Information);
// If clicked "YES". Default Customer will be Added to text boxes. Must click again to be added to Array. Question 5C Complete.
if (defaultCustomer == DialogResult.Yes)
{
MessageBox.Show("Yes Button Pressed.", "Default Customer created");
MessageBox.Show("Not in Array Yet", "Please push Add Button again to add Default Customer to Array");
customerIDTB.Text = "Default";
customerNameTB.Text = "Default";
customerCityTB.Text = "Default";
customerCountryTB.Text = "Default";
return;
}
// If Clicked "NO". No Further Action Taken. Question 5D Complete.
else if (defaultCustomer == DialogResult.No)
{
MessageBox.Show("No Button Pressed", "No further action taken.");
}
}
// Error Message if boxes are missing inputs from User.
else
{
MessageBox.Show("Text box empty", "Please fill out all the text boxes.");
}
// Array Sorted and Boxes are Cleared. Question 5F is complete.
bubbleSort();
clearCustomerMethod();
customerNullPointer++;
}
