下载并显示网上的图片之二(假如是 GIF 图片) 回复 "fancy" 的问题

问题来源: http://www.cnblogs.com/del/archive/2008/07/29/1255817.html#1271328

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本例效果图:

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代码文件:

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unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, IdBaseComponent, IdComponent, IdTCPConnection, IdTCPClient,
  IdHTTP, ExtCtrls;

type
  TForm1 = class(TForm)
    Image1: TImage;
    IdHTTP1: TIdHTTP;
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

uses GifImg;

procedure TForm1.Button1Click(Sender: TObject);
const
  DownUrl = 'http://del.cnblogs.com/Images/xml.gif'; {要下载的文件}
var
  stm: TMemoryStream;
  gif: TGIFImage;
begin
  stm := TMemoryStream.Create;
  IdHTTP1.Get(DownUrl, stm);
  stm.Position := 0;
  gif := TGIFImage.Create;
  gif.LoadFromStream(stm);
  Image1.Picture.Graphic := gif;
  gif.Free;
  stm.Free;
end;

end.

窗体文件:

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object Form1: TForm1
  Left = 0
  Top = 0
  Caption = 'Form1'
  ClientHeight = 127
  ClientWidth = 249
  Color = clBtnFace
  Font.Charset = DEFAULT_CHARSET
  Font.Color = clWindowText
  Font.Height = -11
  Font.Name = 'Tahoma'
  Font.Style = []
  OldCreateOrder = False
  PixelsPerInch = 96
  TextHeight = 13
  object Image1: TImage
    Left = 10
    Top = 10
    Width = 105
    Height = 105
  end
  object Button1: TButton
    Left = 152
    Top = 80
    Width = 75
    Height = 25
    Caption = 'Button1'
    TabOrder = 0
    OnClick = Button1Click
  end
  object IdHTTP1: TIdHTTP
    AllowCookies = True
    ProxyParams.BasicAuthentication = False
    ProxyParams.ProxyPort = 0
    Request.ContentLength = -1
    Request.Accept = 'text/html, */*'
    Request.BasicAuthentication = False
    Request.UserAgent = 'Mozilla/3.0 (compatible; Indy Library)'
    HTTPOptions = [hoForceEncodeParams]
    Left = 112
    Top = 40
  end
end