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Observer.cs
using System;
using System.Text;
using System.Collections.Generic;
namespace Observer
{
public interface ISubject
{
void RegisterObserver(IOvserver o);
void RemoveObserver(IOvserver o);
void NotifyObserver();
}
public interface IOvserver
{
void update(float temp, float humidity, float pressure);
}
public interface IDisplayElement
{
void display();
}
public class WeatherData:ISubject
{
private List<IOvserver> obList;
private float temperature;
private float humidity;
private float pressure;
public WeatherData()
{
obList = new List<IOvserver>();
}
public void RegisterObserver(IOvserver o)
{
obList.Add(o);
}
public void RemoveObserver(IOvserver o)
{
if (obList.IndexOf(o) >= 0)
{
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.SqlClient;
using System.Data;
namespace ConsoleApplication4
{
class Program
{
static void Main(string[] args)
{
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using System;
using System.Collections.Generic;
using System.Text;
using System.Security.Cryptography;//CryptographyÃÜÂëÊõ
namespace DAL
{
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