/// <summary>
/// 委托链：使用Combine和Remove
/// </summary>
private static void ChainDelegateDemo1()
{
Console.WriteLine("----- Chain delegate demo1 -----");
Feedback fb1 = new Feedback(FeedbackToConsole);
Feedback fb2 = new Feedback(FeedbackToMsgBox);
DelegateDemo p = new DelegateDemo();
Feedback fb3 = new Feedback(p.FeedbackToFile);
Feedback fbchain = null;
fbchain = (Feedback)Delegate.Combine(fbchain, fb1);
fbchain = (Feedback)Delegate.Combine(fbchain, fb2);
fbchain = (Feedback)Delegate.Combine(fbchain, fb3);
Counter(1, 2, fbchain);
fbchain = (Feedback)Delegate.Remove(fbchain, new Feedback(FeedbackToMsgBox));
Counter(1, 2, fbchain);
Console.WriteLine("----- end Chain delegate demo1 -----");
Console.WriteLine();
}
/// <summary>
/// 委托链：使用+=和-=
/// </summary>
private static void ChainDelegateDemo2()
{
Console.WriteLine("----- Chain delegate demo2 -----");
Feedback fb1 = new Feedback(FeedbackToConsole);
Feedback fb2 = new Feedback(FeedbackToMsgBox);
DelegateDemo p = new DelegateDemo();
Feedback fb3 = new Feedback(p.FeedbackToFile);
Feedback fbchain = null;
fbchain += fb1;
fbchain += fb2;
fbchain += fb3;
Counter(1, 2, fbchain);
fbchain -= FeedbackToMsgBox;
Counter(1, 2, fbchain);
Console.WriteLine("----- end Chain delegate demo2 -----");
Console.WriteLine();
}
/// <summary>
/// 委托调用实例方法
/// </summary>
private static void InstanceDelegateDemo()
{
Console.WriteLine("----- Instance delegate demo -----");
DelegateDemo p = new DelegateDemo();
Counter(1, 3, new Feedback(p.FeedbackToFile));
Console.WriteLine("----- end Instance delegate demo -----");
Console.WriteLine();
}