最简单的TTcpServer与TTcpClient通信实例-Delphi

unit TcpSCDemo;

//最简单的TTcpServer与TTcpClient通信实例-Delphi

//Borland推出TTcpServer与TTcpClient作为主要的网络通信控件,意味着这两个控件有很大的优越性,

//但是有关这两个控件的资料非常少见,很多人都在问一个相同的问题:TcpServer怎么样向TcpClient发送数据?

//网上的回答千奇百怪,归纳起来有三种:

//1.参考delphi自带的netchat.例子中TcpServer只收不发,答题得分0.

//2.用indy或者ServerSocket/ClientSocket来说事.牛头不对马嘴,答题得分0.

//3.建议使用indy或者ServerSocket/ClientSocket,有道理,也管用,但是回答的不是正题,答题得分59.

//今天我要给出的例子就是用TTcpServer与TTcpClient进行双向通信,相信看过以后就会,答题得分99.

//为什么不是100呢?因为太简单!

interface

uses

Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

Dialogs, Sockets, StdCtrls;

type

//工作流程:

//程序运行后点[连接]连接TcpClient和TcpServer

//点[发送]将edit1中的文本发送到TcpServer,TcpServer接收到以后添加到Mserver,并回复一条消息.

//TcpClient1收到TcpServer回复的消息后添加到TcpServer

//所有控件都说到了吧?Let’s Go!

TFrmMain = class(TForm)

Edit1: TEdit;

Button1: TButton; //连接

Button2: TButton; //发送

Mserver: TMemo;

MClient: TMemo;

TcpServer1: TTcpServer; //active:=True;host:=127.0.0.1;port:=2011;其它默认值

TcpClient1: TTcpClient; //remotehost:=127.0.0.1;remoteport:=2011;其它默认值

procedure TcpServer1Accept(Sender: TObject;

ClientSocket: TCustomIpClient);

procedure Button1Click(Sender: TObject);

procedure Button2Click(Sender: TObject);

private

{ Private declarations }

public

{ Public declarations }

end;

//这个类实现TTcpClient接收TTcpserver回复的消息

TClientReceiveThread = class(TThread)

procedure Execute; override;

end;

var

FrmMain: TFrmMain;

ClientReceiveThread: TClientReceiveThread;

implementation

{$R *.dfm}

procedure TClientReceiveThread.Execute;

begin

with FrmMain do

begin

while TcpClient1.Connected do //死循环!必须的!!!

MClient.Lines.Add(TcpClient1.Receiveln);

end;

end;

//TcpServer1的OnAccept事件

procedure TFrmMain.TcpServer1Accept(Sender: TObject;

ClientSocket: TCustomIpClient);

var

s: String;

begin

while ClientSocket.connected do //死循环!必须的!!!

begin

s := ClientSocket.Receiveln; //收

MServer.Lines.Add(s);

s := DateTimeToStr(Now);

ClientSocket.Sendln(s); //发

end;

end;

procedure TFrmMain.Button1Click(Sender: TObject);

begin

//连接服务器,如果成功创建客户端接收线程

if TcpClient1.Connect then ClientReceiveThread := TClientReceiveThread.Create(false);

end;

procedure TFrmMain.Button2Click(Sender: TObject);

begin

TcpClient1.Sendln(Edit1.Text);

end;

//真的很简单,最后一句话:

end.