EndReceive 接受数据的问题

[zhao5195]

public static void AcceptCallback(IAsyncResult ar)
{
// Signal the main thread to continue.
allDone.Set();

// Get the socket that handles the client request.
Socket listener = (Socket)ar.AsyncState;
Socket handler = listener.EndAccept(ar);
Log("第一步");
// Create the state object.
StateObject state = new StateObject();
state.workSocket = handler;
handler.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
new AsyncCallback(ReadCallback), state);
}
public static void ReadCallback(IAsyncResult ar)
{
String content = String.Empty;
// Retrieve the state object and the handler socket
// from the asynchronous state object.
StateObject state = (StateObject)ar.AsyncState;
Socket handler = state.workSocket;

try
{
// Read data from the client socket.
int bytesRead = handler.EndReceive(ar);





EndReceive　接收到的数据是是否每次需要达到state.buffer　在去接受呢？还是可以接受一点点用回调再去接受呢　？？？？？

[aaajedll]

Study

[hundredpig]

如果您使用的是面向连接的协议，则 EndReceive 方法将读取所有可用的数据，直到达到 BeginReceive 方法的 size 参数所指定的字节数为止。如果远程主机使用 Shutdown 方法关闭了 Socket 连接，并且所有可用数据均已收到，则 EndReceive 方法将立即完成并返回零字节。
如果数据量大于size，那么就要多次执行EndReceive 方法了。直到读完为止。