//ar是IAsyncResult类型的接口，表示异步操作的状态
//是由Listner。beginaccepttcpclient（callback，listener）传递过来的
private void RequestCallback(IAsyncResult ar)
{
//异步操作能执行到此处，说明调用beginconnect已经完成
//并得到了IAsyncResult类型的状态参数ar，但beginconnect尚未结束
//此时需要解除阻塞，以便能调用Endconnect
allDone.Set();
//调用Set后，事件状态变为终止状态，当前线程继续
//buttonconnect_client执行结束
//同时窗体可以响应用户操作
try
{
//获取连接成功后得到的参数状态
client = (TcpClient)ar.AsyncState;
//异步接收传入的连接尝试，使beginconnect正常结束
client.EndConnect(ar);
ListBoxAdd(string.Format("连接[{0}]成功", client.Client.RemoteEndPoint));
//listBox_Status.Invoke(setListBoxCallback,string.Format("连接[{0}]成功",client.Client.RemoteEndPoint));
//获取接收和发送数据的网络流
networkStream = client.GetStream();
//异步接收服务器发送的数据，Beginread完成后，会自动调用readcallback
ReadObject readObj = new ReadObject(networkStream, client.ReceiveBufferSize);
networkStream.BeginRead(readObj.bytes, 0, readObj.bytes.Length, ReadCallback, readObj);
}
catch (System.Exception ex)
{
listBox_Status.Invoke(setListBoxCallback, ex.Message);
return;
}
}
//ar是IAsyncResult类型的几口，表示异步操作的状态
//是由listenner.BeginAcceptTcpClient(callback,listener)传递过来的
private void RequestCallback(IAsyncResult ar)
{
//异步操作能执行到此处，说明调用BeginConnect已经完成
//并且得到了IAsyncResult类型的状态参数ar，但BeginConnect尚未结束
//此时需要解除阻塞，以便能调用EndConnect
allDone.Set();
//调用Set后，事件的状态变为终止状态，当前线程继续
//buttonConnect_Click执行结束，同时窗台界面可以相应用户操作
try
{
//获取连接成功后得到的状态参数
client = (TcpClient)ar.AsyncState;
//异步接收传入的连接尝试，使BeginConnect正常结束
client.EndConnect(ar);
listBoxStatus.Invoke(setListBoxCallback, string.Format("与服务器{0}连接成功", client.Client.RemoteEndPoint));
//获取接收和发送数据的网络流
networkStream = client.GetStream();
//获取接收和发送的数据，BeginRead完成后，会自动调用ReadCallback
ReadObject readObject = new ReadObject(networkStream, client.ReceiveBufferSize);
networkStream.BeginRead(readObject.bytes, 0, readObject.bytes.Length, ReadCallback, readObject);
//allDone.WaitOne();
}
catch (Exception err)
{
listBoxStatus.Invoke(setListBoxCallback, err.Message);
return;
}
}
private void ReadCallback(IAsyncResult ar)
{
//异步操作能执行到此处，说明调用BeginRead已经完成
try
{
ReadObject readObject = (ReadObject)ar.AsyncState;
int count = readObject.netStream.EndRead(ar);
richTextBoxReceive.Invoke(setRichTextBoxReceiveCallback, Encoding.UTF8.GetString(readObject.bytes, 0, count));
if (isExit == false)
{
//重新调用BeginRead进行异步读取
readObject = new ReadObject(networkStream, client.ReceiveBufferSize);
networkStream.BeginRead(readObject.bytes, 0, readObject.bytes.Length, ReadCallback, readObject);
}
}
catch (Exception err)
{
listBoxStatus.Invoke(setListBoxCallback, err.Message);
}
}
private void ReadCallback(IAsyncResult ar)
{
//异步操作能执行到此处，说明调用beginread已经完成
try
{
ReadObject readobj = (ReadObject)ar.AsyncState;
int count = readobj.netStream.EndRead(ar);
//textBox_Receive.Invoke(setTextBoxReceiveCallback, System.Text.Encoding.Unicode.GetString(readobj.bytes, 0, count));
TextBoxAdd("[服务器]:" + System.Text.Encoding.Unicode.GetString(readobj.bytes, 0, count));
if (isExit == false)
{
//重新调用beginread进行异步读取
readobj = new ReadObject(networkStream, client.ReceiveBufferSize);
networkStream.BeginRead(readobj.bytes, 0, readobj.bytes.Length, ReadCallback, readobj);
}
}
catch (System.Exception ex)
{
listBox_Status.Invoke(setListBoxCallback, ex.Message);
}
}