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;
+		}
+	}
+}