(Delphi)如和下载网络文件的例子

FTP下载: http://www.7880.com/Info/Article-19938be0.html

http://community.csdn.net/Expert/topic/3300/3300012.xml?temp=5.028933E-02

FTP下载: TIdFTP控件 (Delphi7 Indy)

Http下载: (Delphi7)使用设计Indy控件下载网络文件 //////////

在Form1中添加控件：

两个Indy控件:IdAntiFreeze1,IdHTTP1;

一个按钮 :Button1;

一个进度条 :PRogressBar1 显示下载速度

procedure TForm1.Button1Click(Sender: TObject);

var

MyStream:TMemoryStream;

begin

IdAntiFreeze1.OnlyWhenIdle:=False;//设置使程序有反应.

MyStream:=TMemoryStream.Create;

try

IdHTTP1.Get('http://www.appcontrols.com/demos/exe/HTTPDemo.exe',MyStream);

except

Showmessage('没有下载成功!');

MyStream.Free;

Exit;

end;

MyStream.SaveToFile(ExtractFilePath(paramstr(0))+'HTTPDemo.zip');

MyStream.Free;

Showmessage('OK');

end;

procedure TForm1.IdHTTP1WorkBegin(Sender: TObject; AWorkMode: TWorkMode;

const AWorkCountMax: Integer);

begin

//开始下载前,将ProgressBar1的最大值设置为需要接收的数据大小.

ProgressBar1.Max:=AWorkCountMax;

ProgressBar1.Min:=0;

ProgressBar1.Position:=0;

end;

procedure TForm1.IdHTTP1Work(Sender: TObject; AWorkMode: TWorkMode;

const AWorkCount: Integer);

begin

//接收数据的时候,进度将在ProgressBar1显示出来.

ProgressBar1.Position:=ProgressBar1.Position+AWorkCount;

end;