public static Employee Load(string firstName, string lastName)
{
Employee employee = new Employee();
// Instantiate a FileStream using FirstNameLastName.dat
// for the filename. FileMode.Open will open
// an existing file or else report an error.
FileStream stream = new FileStream(
firstName + lastName + ".dat", FileMode.Open);
// Create a SteamReader for reading text from the file.
StreamReader reader = new StreamReader(stream);
// Read each line from the file and place it into
// the associated property.
employee.FirstName = reader.ReadLine();
employee.LastName = reader.ReadLine();
employee.Salary = reader.ReadLine();
// Close the StreamReader and its Stream.
reader.Close();
stream.Close();
return employee;
}
static void Main()
{
Employee employee1;
Employee employee2 = new Employee();
employee2.SetName("Inigo", "Montoya");
employee2.Save();
// Modify employee2 after saving.
IncreaseSalary(employee2);
// Load employee1 from the saved version of employee2
employee1 = DataStorage.Load("Inigo", "Montoya");
Console.WriteLine(
"{0}: {1}",
employee1.GetName(),
employee1.Salary);
// ...
}
// Save an employee object to a file
// named with the Employee name.
// Error handling not shown.
public static void Store(Employee employee)
{
// Instantiate a FileStream using FirstNameLastName.dat
// for the filename. FileMode.Create will force
// a new file to be created or override an
// existing file.
FileStream stream = new FileStream(
employee.FirstName + employee.LastName + ".dat",
FileMode.Create);
// Create a StreamWriter object for writing text
// into the FileStream
StreamWriter writer = new StreamWriter(stream);
// Write all the data associated with the employee.
writer.WriteLine(employee.FirstName);
writer.WriteLine(employee.LastName);
writer.WriteLine(employee.Salary);
// Close the StreamWriter and its Stream.
writer.Close();
stream.Close();
}
static void IncreaseSalary(Employee employee)
{
employee.Salary = "Enough to survive on";
}