C# 高效Socket运行机制系列文章一 SocketAsyncEventArgs

        微软创建了SocketAsyncEventArgs类来帮助你编写可扩展、高性能socket服务器代码。

        SocketAsyncEventArgs使用网络套接字类System.Net通过异步方法完成I / O端口通讯。在以下的文章中我们会实现一个基于windows TCP/IP协议的可靠的，可扩展的Socket通讯。Microsoft 对相关技术的说明可以参考SocketAsyncEventArgs，

I/O Completion Ports。

        SocketAsyncEventArgs帮助我们访问一个套接字，它有异步工作的优点，可以设置缓冲区空间、对象池，同时响应完成事件Completed event。有一个状态对象,可以通过属性访问套接字。

        这篇文章的目的是帮助你理解的基本使用SocketAsyncEventArgs类。

        对于SocketAsyncEventArgs类,微软的网站说,它需要“平台:Windows 7,Windows Vista、Windows XP SP3、Windows Server 2008、Windows Server 2003。NET Framework Client Profile框架支持:4、3.5
SP1,3.0 SP1,2.0 SP1。()。NET Framework Client Profile框架客户概要支持:4、3.5 SP1。”

Properties

	Name	Description
	AcceptSocket	Gets or sets the socket to use or the socket created for accepting a connection with an asynchronous socket method.
	Buffer	Gets the data buffer to use with an asynchronous socket method.
	BufferList	Gets or sets an array of data buffers to use with an asynchronous socket method.
	BytesTransferred	Gets the number of bytes transferred in the socket operation.
	ConnectByNameError	Gets the exception in the case of a connection failure when a DnsEndPoint was used.
	ConnectSocket	The created and connected Socket object after successful completion of the ConnectAsync method.
	Count	Gets the maximum amount of data, in bytes, to send or receive in an asynchronous operation.
	DisconnectReuseSocket	Gets or sets a value that specifies if socket can be reused after a disconnect operation.
	LastOperation	Gets the type of socket operation most recently performed with this context object.
	Offset	Gets the offset, in bytes, into the data buffer referenced by the Buffer property.
	ReceiveMessageFromPacketInfo	Gets the IP address and interface of a received packet.
	RemoteEndPoint	Gets or sets the remote IP endpoint for an asynchronous operation.
	SendPacketsElements	Gets or sets an array of buffers to be sent for an asynchronous operation used by the Socket.SendPacketsAsync method.
	SendPacketsFlags	Gets or sets a bitwise combination of TransmitFileOptions values for an asynchronous operation used by the Socket.SendPacketsAsync method.
	SendPacketsSendSize	Gets or sets the size, in bytes, of the data block used in the send operation.
	SocketClientAccessPolicyProtocol	Obsolete. Gets or sets the protocol to use to download the socket client access policy file.
	SocketError	Gets or sets the result of the asynchronous socket operation.
	SocketFlags	Gets the results of an asynchronous socket operation or sets the behavior of an asynchronous operation.
	UserToken	Gets or sets a user or application object associated with this asynchronous socket operation.

Methods

	Name	Description
	Dispose	Releases the unmanaged resources used by the SocketAsyncEventArgs instance and optionally disposes of the managed resources.
	Equals(Object)	Determines whether the specified object is equal to the current object. (Inherited from Object.)
	Finalize	Frees resources used by the SocketAsyncEventArgs class. (Overrides Object.Finalize().)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	OnCompleted	Represents a method that is called when an asynchronous operation completes.
	SetBuffer(Int32, Int32)	Sets the data buffer to use with an asynchronous socket method.
	SetBuffer(Byte[], Int32, Int32)	Sets the data buffer to use with an asynchronous socket method.
	ToString	Returns a string that represents the current object. (Inherited from Object.)

Events

	Name	Description
	Completed	The event used to complete an asynchronous operation.

下一扁文章我会针对TCP协议进行进一步的说明