数据库中某个图像字段存有jpe,bmp,icon,怎样读出来啊？

Question

数据库中某个图像字段存有jpe,bmp,icon,怎样读出来啊？通过读文件头的方法是否可以，怎样做，请给出详细代码？

Answer 1

别人的只能读两种
procedure TDM.ViewPhoto(ImagX:TImage;FiledX:TBlobField);
var
    B:Tbitmap;
    JpegImage:TJpegImage;
    BS:TBlobStream;
begin
    ImagX.Picture.Assign(nil);
    if not FiledX.IsNull then begin
        try//如果是Jpeg格式
           BS := TBlobStream.Create(TBlobField(FiledX), bmRead);
           JpegImage := TJpegImage.Create;
           JpegImage.JPEGNeeded;
           JpegImage.LoadFromStream(BS);
           ImagX.Picture.Assign(JpegImage);
           JpegImage.Free;
           BS.Free;
        except//如果是BMP格式
           BS := TBlobStream.Create(TBlobField(FiledX), bmRead);
           B:=Tbitmap.Create;
           b.LoadFromStream(BS);
           ImagX.Picture.Assign(b);
           B.Free;
           BS.Free;
        end;
    end;
end;