C# development server and client communications programs for beginners to learn

基于jxta的P2P框架的系统，主要功能有局域网聊天、文件共享系统、白板等-base on jxta

计算校验和 命令行：check_sum infile 其中check_sum是程序名，infile是数据文件名 输出：数据文件的校验和。 目的是通过数据链路层与介质访问控制层的学习，根据数据链路层的基本原理，针对普遍应用的Ethernet帧，通过构造一个具体的帧，深入理解网络协议的基本概念与网络问题处理的一般方法。-calculated checksum command line : check_sum infile which check_sum procedures, and infile data output file name : data files, the checksum. The purpose of the data link layer and the MAC layer of learning, according to the data link layer to the basic principles of universal application against the Ethernet frame, and by constructing a concrete frames, in-depth understanding of network protocols and the basic concepts of network issues to deal with the general approach.

ISAPI 实现 web图形，关于DCS系统实时数据展示的。这是一个基本工程，但是涉及到从DCS中获取数据，代码相对少些，对于理解通过ISAPI实现jpeg图形有些帮助。-ISAPI make a web image（JPEG），It s a simple example.

很好的解决大文件传输,以及视频数据的发送也可以借鉴.-Very good solution to large file transfers, as well as send video data can also learn from.

面向连接的服务器流程中，必须设置服务器套接字为监听状态；而客户机则是主动连接。无连接客户机和服务器。无连接客户机和服务器在调用的函数方面没有区别，区别在于服务器一般先启动recvfrom等待客户机的数据。客户机和服务器的通信过程为客户向服务器发送数据，服务器收到数据后给予应答，通信结束。-connection-oriented server process, you must set up to monitor server socket state; While the client is active connector. Without connecting client and server. Without connecting client and server in a function called no distinction, the general difference is the server for first launching recvfrom client data. Client and server communication process for clients to send data to the server, the server data received responses and communication end.

物理数据迁移器 可以作为pc机之间的数据中转-physical data transfer device can be used as PCs interchange of data between

这是一个语音聊天的源代码，完成了主要的功能，只是采集的语音信号没有编码就直接发送出去了，有兴趣的朋友可以-This a voice chat source code, to complete the main function, but the acquisition of the voice signal coding not directly sent away, interested friends can s

一个采用asp开发的论坛，结构清晰，树形目录，使用方便简单-an asp development using the forum, clear directory tree, easy to use simple

邮件客户端程序，根据pop服务器，用户名可以收取邮件-E-mail client program, according to pop server, user name, e-mail that may be charged

比较好SOCKET API通讯程序源代码-better communication API source code