IStream与TStream之间的相互转换

发布时间：2020-05-11 03:37:07 所属栏目：PHP教程来源：互联网

导读：IStream与TStream之间的相互转换的代码

procedure TForm1.Button1Click(Sender: TObject);
var
  memoStream,OleStream:TStream;
  Stream : IStream;
begin
  image1.Picture :=nil;
  image2.Picture :=nil;

  //显示初始照片
  image1.Picture.LoadFromFile('c:logo.bmp');
  memoStream := TmemoryStream.Create;
  try
  //将照片保存为TmemoryStream
    image1.Picture.Bitmap.SaveToStream(memoStream);
    memoStream.Position :=0;

  //将TmemoryStream转成IStream
    stream:=TStreamAdapter.Create(memoStream);

  //将IStream转成TOleStream ==TmemoryStream
    OleStream := TOleStream.Create(Stream);
    image2.Picture.Bitmap.LoadFromStream(OleStream);
  finally
    memoStream.Free;
    OleStream.Free;
  end;
end;


///////////////////////////

uses

....................AxCtrls,ActiveX;    //必加此二单元

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