Mega Code Archive
Use ReadOnlyCollection to wrap a collection
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using System;
using System.Collections.ObjectModel;
using System.Collections.Generic;
using System.Text;
using System.Runtime.Serialization;
public class Customer : System.IComparable {
private int _id;
private string _name;
private string _rating;
private static SortOrder _order;
public enum SortOrder {
Ascending = 0,
Descending = 1
}
public Customer(int id, string name)
: this(id, name, "Other") {
}
public Customer(int id, string name, string rating) {
this._id = id;
this._name = name;
this._rating = rating;
}
public int Id {
get { return this._id; }
set { this._id = value; }
}
public string Name {
get { return this._name; }
set { this._name = value; }
}
public string Rating {
get { return this._rating; }
set { this._rating = value; }
}
public static SortOrder Order {
get { return _order; }
set { _order = value; }
}
public override bool Equals(Object obj) {
bool retVal = false;
if (obj != null) {
Customer custObj = (Customer)obj;
if ((custObj.Id == this.Id) &&
(custObj.Name.Equals(this.Name) &&
(custObj.Rating.Equals(this.Rating))))
retVal = true;
}
return retVal;
}
public override string ToString() {
return this._id + ": " + this._name;
}
public int CompareTo(Object obj) {
switch (_order) {
case SortOrder.Ascending:
return this.Name.CompareTo(((Customer)obj).Name);
case SortOrder.Descending:
return (((Customer)obj).Name).CompareTo(this.Name);
default:
return this.Name.CompareTo(((Customer)obj).Name);
}
}
}
class Program {
public static void Main(){
List<Customer> collCustList = new List<Customer>();
collCustList.Add(new Customer(99, "H", "P"));
collCustList.Add(new Customer(77, "B", "G"));
collCustList.Add(new Customer(55, "B", "G"));
collCustList.Add(new Customer(88, "B", "P"));
collCustList.Add(new Customer(11, "L", "O"));
ReadOnlyCollection<Customer> roCustColl = new ReadOnlyCollection<Customer>(collCustList);
Customer tmpCust = roCustColl[1];
tmpCust.Name = "NAME CHANGED";
foreach (Customer cust in roCustColl)
Console.Out.WriteLine(cust);
}
}
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