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unit Downloader;
interface uses Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics, Vcl.Controls, Vcl.Forms, Vcl.Dialogs, IdAntiFreezeBase, Vcl.IdAntiFreeze, IdBaseComponent, IdComponent, IdTCPConnection, IdTCPClient, IdHTTP, Vcl.StdCtrls, Vcl.ComCtrls, Vcl.Buttons; type TMainFrm = class(TForm) idhtp1: TIdHTTP; idntfrz1: TIdAntiFreeze; dlgSave1: TSaveDialog; edt1: TEdit; edt2: TEdit; lbl1: TLabel; lbl2: TLabel; btn1: TBitBtn; pb1: TProgressBar; procedure btn1Click(Sender: TObject); private { Private declarations } public { Public declarations } end; var MainFrm: TMainFrm; implementation {$R *.dfm} procedure TMainFrm.btn1Click(Sender: TObject); var Mystream:TMemoryStream; begin if dlgSave1.Execute then edt2.Text := dlgSave1.FileName; idntfrz1.OnlyWhenIdle :=False; Mystream:=TMemoryStream.Create; try idhtp1.Get(edt1.Text, Mystream); except ShowMessage(‘Network Error‘); Mystream.Free; Exit; end; Mystream.SaveToFile(edt2.Text); Mystream.Free; ShowMessage(‘OK‘); end; end. |
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原文地址:http://www.cnblogs.com/kivin/p/4646931.html