customer maintenance

1 files changed, 64 insertions, 0 deletions

diff --git a/customer_maintenance/CustomerMaintenance/CustomerDB.cs b/customer_maintenance/CustomerMaintenance/CustomerDB.cs
new file mode 100644
index 0000000..a1a3fc6
--- /dev/null
+++ b/customer_maintenance/CustomerMaintenance/CustomerDB.cs
@@ -0,0 +1,64 @@
+using System;

+using System.Collections.Generic;

+using System.Text;

+using System.IO;

+

+namespace CustomerMaintenance

+{

+	public static class CustomerDB

+	{

+		private const string dir = @"C:\C#\Files\";

+		private const string path = dir + "Customers.txt";

+

+

+		public static void SaveCustomers(List<Customer> customers)

+		{

+			// create the output stream for a text file that exists

+			StreamWriter textOut =

+				new StreamWriter(

+				new FileStream(path, FileMode.Create, FileAccess.Write));

+

+			// write each customer

+			foreach (Customer customer in customers)

+			{

+				textOut.Write(customer.FirstName + "|");

+				textOut.Write(customer.LastName + "|");

+				textOut.WriteLine(customer.Email);

+			}

+

+			// write the end of the document

+			textOut.Close();

+		}

+

+		public static List<Customer> GetCustomers()

+		{

+			// if the directory doesn't exist, create it

+			if (!Directory.Exists(dir))

+				Directory.CreateDirectory(dir);

+

+			// create the object for the input stream for a text file

+			StreamReader textIn =

+				new StreamReader(

+					new FileStream(path, FileMode.OpenOrCreate, FileAccess.Read));

+

+			// create the array list for customers

+			List<Customer> customers = new List<Customer>();

+

+			// read the data from the file and store it in the ArrayList

+			while (textIn.Peek() != -1)

+			{

+				string row = textIn.ReadLine();

+				string[] columns = row.Split('|');

+				Customer customer = new Customer();

+				customer.FirstName = columns[0];

+				customer.LastName = columns[1];

+				customer.Email = columns[2];

+				customers.Add(customer);

+			}

+

+			textIn.Close();

+

+			return customers;

+		}

+	}

+}