最简洁的泛型c#消息机制

using System;
using System.Collections;

public class EventSystem {
public delegate void ListenerDelegate();
public delegate void ListenerDelegate<T>(T t);
public delegate void ListenerDelegate<T1, T2>(T1 t1, T2 t2);
public delegate void ListenerDelegate<T1, T2, T3>(T1 t1, T2 t2, T3 t3);

private Hashtable listeners = new Hashtable();

#region Addlistener
public void AddListener(string eventName, ListenerDelegate listener) {
ListenerDelegate listenerDelegate = listeners[eventName] as ListenerDelegate;
listenerDelegate = (ListenerDelegate)Delegate.Combine(listenerDelegate, listener);
listeners[eventName] = listenerDelegate;
}

public void AddListener<T>(string eventName, ListenerDelegate<T> listener) {
ListenerDelegate<T> listenerDelegate = listeners[eventName] as ListenerDelegate<T>;
listenerDelegate = (ListenerDelegate<T>)Delegate.Combine(listenerDelegate, listener);
listeners[eventName] = listenerDelegate;
}

public void AddListener<T1,T2>(string eventName, ListenerDelegate<T1,T2> listener) {
ListenerDelegate<T1,T2> listenerDelegate = listeners[eventName] as ListenerDelegate<T1,T2>;
listenerDelegate = (ListenerDelegate<T1,T2>)Delegate.Combine(listenerDelegate, listener);
listeners[eventName] = listenerDelegate;
}

public void AddListener<T1,T2,T3>(string eventName, ListenerDelegate<T1,T2,T3> listener) {
ListenerDelegate<T1,T2,T3> listenerDelegate = listeners[eventName] as ListenerDelegate<T1,T2,T3>;
listenerDelegate = (ListenerDelegate<T1,T2,T3>)Delegate.Combine(listenerDelegate, listener);
listeners[eventName] = listenerDelegate;
}
#endregion

#region RemoveListener
public void RemoveListener(string eventName, ListenerDelegate listener) {
Delegate remove = Delegate.Remove(listeners[eventName] as ListenerDelegate, listener);
SetRemoveValue(eventName, remove);
}

public void RemoveListener<T>(string eventName, ListenerDelegate<T> listener) {
var remove = Delegate.Remove(listeners[eventName] as ListenerDelegate<T>, listener);
SetRemoveValue(eventName, remove);
}

public void RemoveListener<T1, T2>(string eventName, ListenerDelegate<T1, T2> listener) {
Delegate remove = Delegate.Remove(listeners[eventName] as ListenerDelegate<T1, T2>, listener);
SetRemoveValue(eventName, remove);
}

public void RemoveListener<T1, T2, T3>(string eventName, ListenerDelegate<T1, T2, T3> listener) {
Delegate remove = Delegate.Remove(listeners[eventName] as ListenerDelegate<T1, T2, T3>, listener);
SetRemoveValue(eventName, remove);
}

private void SetRemoveValue(string eventName, Delegate remove) {
if (remove == null) {
listeners.Remove(eventName);
} else {
listeners[eventName] = remove;
}
}
#endregion

public void RemoveAllListener(string eventName) {
listeners.Remove(eventName);
}

public void Dispatch(string eventName)
{
if (listeners.ContainsKey(eventName)) {
ListenerDelegate listenerDelegate = listeners[eventName] as ListenerDelegate;
listenerDelegate();
}
}

public void Dispatch<T>(string eventName, T t) {
if (listeners.ContainsKey(eventName)) {
ListenerDelegate<T> listenerDelegate = listeners[eventName] as ListenerDelegate<T>;
listenerDelegate(t);
}
}

public void Dispatch<T1, T2>(string eventName, T1 t1, T2 t2) {
if (listeners.ContainsKey(eventName)) {
ListenerDelegate<T1,T2> listenerDelegate = listeners[eventName] as ListenerDelegate<T1,T2>;
listenerDelegate(t1, t2);
}
}

public void Dispatch<T1, T2, T3>(string eventName, T1 t1, T2 t2, T3 t3) {
if (listeners.ContainsKey(eventName)) {
ListenerDelegate<T1,T2,T3> listenerDelegate = listeners[eventName] as ListenerDelegate<T1,T2,T3>;
listenerDelegate(t1, t2, t3);
}
}
}

 

最多支持3个参数,再多我认为要写结构体了

Delegate.Combine和+= 是有区别的   https://www.coder.work/article/1627775

posted @ 2021-11-30 10:10  三页菌  阅读(65)  评论(0编辑  收藏  举报