Delphi中根据IP地址得到主机名

本实例演示如何利用TUdpSocket组件获取IP地址和主机名。

　　向窗体上添加一个TUdpSocket组件，如图1所示。

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procedure TForm1.FormCreate(Sender: TObject);
　begin
　　self.Caption:=UdpSocket1.LocalHostName;
　　self.Caption:=self.Caption+’:’+UdpSocket1.LocalHostAddr;
end;

　　程序代码如下：

unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, Sockets, ExtCtrls;

type
　TForm1 = class(TForm)
　UdpSocket1: TUdpSocket;
　procedure FormCreate(Sender: TObject);
private
　{ Private declarations }
public
　{ Public declarations }
end;

var
　Form1: TForm1;
　implementation
　{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject);
　begin
　　self.Caption:=UdpSocket1.LocalHostName;
　　self.Caption:=self.Caption+’:’+UdpSocket1.LocalHostAddr;
　end;
end.

　　保存文件，然后按F9键运行程序，程序运行结果如图2所示。

补充：软件开发 , Delphi ,