本文整理汇总了C#中System.IObserver<T>接口的典型用法代码示例。如果您正苦于以下问题:C# IObserver<T>接口的具体用法?C# IObserver<T>怎么用?C# IObserver<T>使用的例子?那么恭喜您, 这里精选的接口代码示例或许可以为您提供帮助。
IObserver<T>接口属于System命名空间,在下文中一共展示了IObserver<T>接口的5个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: Location
public struct Location
{
double lat, lon;
public Location(double latitude, double longitude)
{
this.lat = latitude;
this.lon = longitude;
}
public double Latitude
{ get { return this.lat; } }
public double Longitude
{ get { return this.lon; } }
}
示例2: LocationReporter
//引入命名空间
using System;
public class LocationReporter : IObserver<Location>
{
private IDisposable unsubscriber;
private string instName;
public LocationReporter(string name)
{
this.instName = name;
}
public string Name
{ get{ return this.instName; } }
public virtual void Subscribe(IObservable<Location> provider)
{
if (provider != null)
unsubscriber = provider.Subscribe(this);
}
public virtual void OnCompleted()
{
Console.WriteLine("The Location Tracker has completed transmitting data to {0}.", this.Name);
this.Unsubscribe();
}
public virtual void OnError(Exception e)
{
Console.WriteLine("{0}: The location cannot be determined.", this.Name);
}
public virtual void OnNext(Location value)
{
Console.WriteLine("{2}: The current location is {0}, {1}", value.Latitude, value.Longitude, this.Name);
}
public virtual void Unsubscribe()
{
unsubscriber.Dispose();
}
}
示例3: LocationTracker
public class LocationTracker : IObservable<Location>
{
public LocationTracker()
{
observers = new List<IObserver<Location>>();
}
private List<IObserver<Location>> observers;
public IDisposable Subscribe(IObserver<Location> observer)
{
if (! observers.Contains(observer))
observers.Add(observer);
return new Unsubscriber(observers, observer);
}
private class Unsubscriber : IDisposable
{
private List<IObserver<Location>>_observers;
private IObserver<Location> _observer;
public Unsubscriber(List<IObserver<Location>> observers, IObserver<Location> observer)
{
this._observers = observers;
this._observer = observer;
}
public void Dispose()
{
if (_observer != null && _observers.Contains(_observer))
_observers.Remove(_observer);
}
}
public void TrackLocation(Nullable<Location> loc)
{
foreach (var observer in observers) {
if (! loc.HasValue)
observer.OnError(new LocationUnknownException());
else
observer.OnNext(loc.Value);
}
}
public void EndTransmission()
{
foreach (var observer in observers.ToArray())
if (observers.Contains(observer))
observer.OnCompleted();
observers.Clear();
}
}
示例4: LocationUnknownException
public class LocationUnknownException : Exception
{
internal LocationUnknownException()
{ }
}
示例5: Main
//引入命名空间
using System;
class Program
{
static void Main(string[] args)
{
// Define a provider and two observers.
LocationTracker provider = new LocationTracker();
LocationReporter reporter1 = new LocationReporter("FixedGPS");
reporter1.Subscribe(provider);
LocationReporter reporter2 = new LocationReporter("MobileGPS");
reporter2.Subscribe(provider);
provider.TrackLocation(new Location(47.6456, -122.1312));
reporter1.Unsubscribe();
provider.TrackLocation(new Location(47.6677, -122.1199));
provider.TrackLocation(null);
provider.EndTransmission();
}
}
输出:
FixedGPS: The current location is 47.6456, -122.1312 MobileGPS: The current location is 47.6456, -122.1312 MobileGPS: The current location is 47.6677, -122.1199 MobileGPS: The location cannot be determined. The Location Tracker has completed transmitting data to MobileGPS.