Re: OOP object collections
- From: "RSH" <way_beyond_oops@xxxxxxxxx>
- Date: Fri, 8 Feb 2008 12:04:02 -0500
Oops...I hadnt finished the CompareTo method...here is what I came up
with...
public int CompareTo(IEmployee other)
{
switch (m_Parent.Employees.SortBy)
{
case EmployeeSortType.Id:
return this.m_Id.CompareTo(other.Id);
case EmployeeSortType.FirstName:
return this.m_FirstName.CompareTo(other.FirstName);
case EmployeeSortType.LastName:
return this.m_LastName.CompareTo(other.LastName);
default:
return 0;
}
}
Everything seems to work as desired and I have all or the different sort
methods working.
"RSH" <way_beyond_oops@xxxxxxxxx> wrote in message
news:eHDMxInaIHA.5984@xxxxxxxxxxxxxxxxxxxxxxx
Sloan,
Im struggling a bit with trying to add a custom sort method. I want to be
able to sort by LastName, FirstName or ID.
...and Im having a little trouble figuring out where the different
components go.
here is kind of where I am heading:
Employee Classes:
public interface IEmployee : IComparable<IEmployee>
{
string FirstName { get; set; }
int Id { get; set; }
string LastName { get; set; }
}
public sealed class Employee : Workshop.IEmployee
{
private int m_Id;
private string m_LastName;
private string m_FirstName;
private ICompany m_Parent = null;
public Employee(ICompany Parent, int Id, string LastName, string
FirstName)
{
m_Id = Id;
m_LastName = LastName;
m_FirstName = FirstName;
m_Parent = Parent;
}
public int Id { get { return m_Id; } set { m_Id = value; } }
public string LastName { get { return m_LastName; } set { m_LastName =
value; } }
public string FirstName { get { return m_FirstName; } set { m_FirstName =
value; } }
public int CompareTo(IEmployee other)
{
switch (m_SortBy)
{
case EmployeeSortType.Id:
return this.m_Id.CompareTo(other.Id);
case EmployeeSortType.FirstName:
return this.m_FirstName.CompareTo(other.FirstName);
case EmployeeSortType.LastName:
return this.m_LastName.CompareTo(other.LastName);
default:
return 0;
}
}
}
public enum EmployeeSortType
{
Id, FirstName, LastName
}
Company Class
public interface ICompany
{
int Id { get;}
string Name { get;set;}
IEmployeeCollection Employees { get;}
void PrintEmployees();
void LoadEmployees();
}
public interface IEmployeeCollection : IList<IEmployee>
{
EmployeeSortType SortBy { get;set;}
void Sort();
}
public sealed class Company : ICompany
{
private int m_Id;
private string m_Name;
private IEmployeeCollection m_EmployeeCollection = null;
public Company(int Id, string Name)
{
m_Id = Id;
m_Name = Name;
}
public int Id { get { return m_Id; } }
public string Name { get { return m_Name; } set { m_Name = value; } }
public IEmployeeCollection Employees
{
get
{
return m_EmployeeCollection;
}
}
public void LoadEmployees()
{
m_EmployeeCollection = new EmployeeCollection();
CompanyController.GetEmployees(this);
}
public void PrintEmployees()
{
foreach (Employee employee in m_EmployeeCollection)
{
Console.WriteLine(string.Format("{0}\t{1}\t{2}", employee.Id,
employee.LastName, employee.FirstName));
}
}
}
public class EmployeeCollection : List<IEmployee>, IEmployeeCollection
{
private EmployeeSortType m_SortBy = EmployeeSortType.LastName;
public EmployeeSortType SortBy { get { return m_SortBy; } set { m_SortBy =
value; } }
}
Company Controller
public static class CompanyController
{
public static ICompany GetCompany(int companyId)
{
return new Company(1001, "Bills House of Bugs");
}
public static void GetEmployees(ICompany company)
{
IEmployee employee = null;
employee = new Employee(company, 1000, "House", "William");
company.Employees.Add(employee);
employee = new Employee(company, 1001, "Appleyard", "Katie");
company.Employees.Add(employee);
employee = new Employee(company, 1002, "Costen", "Rosa");
company.Employees.Add(employee);
employee = new Employee(company, 1003, "Herhuth", "Ron");
company.Employees.Add(employee);
}
}
.
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