求delphi UDP组播收发端实例

求delphi UDP组播收发端实例
求delphi UDP组播收发端实例
求delphi UDP组播收发端实例

来自GPT:
以下是一个简单的Delphi UDP组播收发端实例：

收端：

unit Unit1;

interface

uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
  Vcl.Controls, Vcl.Forms, Vcl.Dialogs, IdBaseComponent, IdComponent,
  IdUDPBase, IdUDPClient, IdSocketHandle, Vcl.StdCtrls;

type
  TForm1 = class(TForm)
    IdUDPClient1: TIdUDPClient;
    Memo1: TMemo;
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
    procedure IdUDPClient1UDPRead(Sender: TObject; AData: TBytes;
      ABinding: TIdSocketHandle);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
  IdUDPClient1.Active := True;
  IdUDPClient1.MulticastGroup := '224.0.0.1'; // 组播地址
  IdUDPClient1.Port := 6000; // 端口号
end;

procedure TForm1.IdUDPClient1UDPRead(Sender: TObject; AData: TBytes;
  ABinding: TIdSocketHandle);
var
  S: string;
begin
  S := Trim(TEncoding.UTF8.GetString(AData)); // 转换为字符串
  Memo1.Lines.Add(S);
end;

end.

发端：

unit Unit2;

interface

uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
  Vcl.Controls, Vcl.Forms, Vcl.Dialogs, IdBaseComponent, IdComponent,
  IdUDPBase, IdUDPServer, IdSocketHandle, Vcl.StdCtrls;

type
  TForm2 = class(TForm)
    IdUDPServer1: TIdUDPServer;
    Memo1: TMemo;
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form2: TForm2;

implementation

{$R *.dfm}

procedure TForm2.Button1Click(Sender: TObject);
begin
  IdUDPServer1.Active := True;
  IdUDPServer1.Bindings.Add;
  IdUDPServer1.Bindings[0].IP := '0.0.0.0'; // 监听所有IP地址
  IdUDPServer1.Bindings[0].Port := 6000; // 端口号
  IdUDPServer1.Bindings[0].MulticastGroup := '224.0.0.1'; // 组播地址
end;

end.

注意：需要在组播地址范围内选择一个未被占用的地址，一般为224.0.0.0~239.255.255.255。