Delphi-网络编程-第一个网络方面作品(UDP聊天程序)

其实这不算是一个聊天程序，因为还不能实现双方互发信息，只有一方能发信息，呵呵

我以后再改进吧。。。。

服务端代码：

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, IdBaseComponent, IdComponent, IdUDPBase, IdUDPServer, StdCtrls,
  ExtCtrls,IdSocketHandle;

type
  TCommBlock = record        // 通讯结构
  SenderName,              // 发信方名字
  Msg : string[100];  // 消息
  end;
  TForm1 = class(TForm)
    Memo1: TMemo;
    Panel1: TPanel;
    Memo2: TMemo;
    GroupBox1: TGroupBox;
    GroupBox2: TGroupBox;
    LabeledEdit1: TLabeledEdit;
    Button1: TButton;
    IdUDPServer1: TIdUDPServer;
    Button2: TButton;
    Button3: TButton;
    procedure IdUDPServer1UDPRead(Sender: TObject; AData: TStream;
      ABinding: TIdSocketHandle);
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.IdUDPServer1UDPRead(Sender: TObject; AData: TStream;
  ABinding: TIdSocketHandle);//客户端连接上后触发的事件
var
  Comm : TCommBlock;
begin
  AData.ReadBuffer(Comm,AData.Size);
  Memo1.Lines.Add(Comm.SenderName+'：'+Comm.Msg);
end;

procedure TForm1.Button1Click(Sender: TObject);//倾听
begin
  IdUDPServer1.DefaultPort := StrToInt(LabeledEdit1.Text);
  IdUDPServer1.Active := True;
  Button1.Enabled:=True;
end;

procedure TForm1.Button2Click(Sender: TObject);//清空记录
begin
Memo1.Clear;
end;

procedure TForm1.Button3Click(Sender: TObject);//关闭
begin
Close;
end;

end.

 

客户端代码：

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, ExtCtrls, IdBaseComponent, IdComponent, IdUDPBase,
  IdUDPClient;

type
  TCommBlock = record        // 通讯结构
    SenderName,              // 发信方名字
    Msg : string[100];  // 消息
  end;
  TForm1 = class(TForm)
    Panel2: TPanel;
    Memo2: TMemo;
    GroupBox1: TGroupBox;
    GroupBox2: TGroupBox;
    LabeledEdit1: TLabeledEdit;
    LabeledEdit2: TLabeledEdit;
    Button1: TButton;
    Button2: TButton;
    Memo1: TMemo;
    IdUDPClient1: TIdUDPClient;
    LabeledEdit3: TLabeledEdit;
    Button3: TButton;
    Button4: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure Button4Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation
const
  RECIEVETIMEOUT = 5000; // 毫秒，连接等待
{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);//连技
begin
  IdUDPClient1.Host:=LabeledEdit1.Text;
  IdUDPClient1.Port:=StrToInt(LabeledEdit2.Text);
  IdUDPClient1.ReceiveTimeout:=RECIEVETIMEOUT;
end;

procedure TForm1.Button2Click(Sender: TObject);//发送
var
  Comm:TCommBlock;
begin
  Comm.SenderName:=LabeledEdit3.Text;
  Comm.Msg:=Memo2.Lines.Text;
  Memo1.Lines.Add(Comm.SenderName+'：' + Comm.Msg);
  IdUDPClient1.SendBuffer(Comm,sizeof(Comm));
end;

procedure TForm1.Button3Click(Sender: TObject);//关闭
begin
Close;
end;

procedure TForm1.Button4Click(Sender: TObject);//清空记录
begin
Memo1.Clear;
end;

end.