public string[] Join(string name)
{
bool userAdded = false;
myEventHandler = new ChatEventHandler(MyEventHandler); //将MyEventHandler方法作为参数传递给委托
lock (syncObj) //线程的同步性，同步访问多个线程的任何变量，利用lock(独占锁)，确保数据访问的唯一性。
{
if (!chatters.ContainsKey(name) && name != "" && name != null)
{
this.name = name;
chatters.Add(name, MyEventHandler);
userAdded = true;
}
}
if (userAdded)
{
callback = OperationContext.Current.GetCallbackChannel <IMyMessageCallback>(); //获取当前操作客户端实例的通道给IChatCallback接口的实例callback,此通道是一个定义为IChatCallback类型的泛类型,通道的类型是事先服务契约协定好的双工机制。
ChatEventArgs e = new ChatEventArgs(); //实例化事件消息类ChatEventArgs
e.msgType = MessageType.UserEnter;
e.name = name;
BroadcastMessage(e);
ChatEvent += myEventHandler;
string[] list = new string[chatters.Count]; //以下代码返回当前进入聊天室成员的称列表
lock (syncObj)
{
chatters.Keys.CopyTo(list, 0);//将字典中记录的用户信息复制到数组中返回。
}
return(list);
}
else
{
return(null);
}
}
private void ThreadCallback(object callback)
{
IMyMessageCallback messageCallback = callback as IMyMessageCallback;
for (int i = 0; i < 10; i++)
{
messageCallback.OnCallback("message " + i.ToString());
Thread.Sleep(1000);
}
}
private async void TaskCallback(object callback)
{
IMyMessageCallback messageCallback = callback as IMyMessageCallback;
for (int i = 0; i < 10; i++)
{
messageCallback.OnCallback($"message {i}");
await Task.Delay(1000);
}
}
public void MessageToServer(string message)
{
Console.WriteLine($"message from the client: {message}");
IMyMessageCallback callback =
OperationContext.Current.
GetCallbackChannel <IMyMessageCallback>();
callback.OnCallback("message from the server");
Task.Factory.StartNew(new Action <object>(TaskCallback), callback, TaskCreationOptions.LongRunning);
}
public void MessageToServer(string message)
{
Console.WriteLine("message from the client: {0}", message);
IMyMessageCallback callback =
OperationContext.Current.
GetCallbackChannel <IMyMessageCallback>();
callback.OnCallback("message from the server");
new Thread(ThreadCallback).Start(callback);
}
public void MessageToServer(string message)
{
WriteLine($"message from the client: {message}");
IMyMessageCallback callback =
OperationContext.Current.
GetCallbackChannel <IMyMessageCallback>();
callback.OnCallback("message from the server");
Task.Run(() => TaskCallback(callback));
}
public void MessageToServer(string message)
{
Console.WriteLine("message from the client: {0}", message);
IMyMessageCallback callback =
OperationContext.Current.
GetCallbackChannel <IMyMessageCallback>();
callback.OnCallback("message from the server");
Task.Factory.StartNew(new Action <object>(TaskCallback), callback);
// new Thread(ThreadCallback).Start(callback);
}
