.ChangeDir(dir: string);
var
SearchRec : TSearchRec;
Attr : integer;
Found : integer;
ExtFileName:string;
temstr:string;
begin
clear;
temstr:=dir+''''\*.*'''';
Attr := faAnyFile;
Found := FindFirst(temstr, Attr, SearchRec);
while Found = 0 do
begin
ExtFileName:=LowerCase(ExtractFileExt(SearchRec.Name));
if (ExtFileName=''''.bmp'''') or (ExtFileName=''''.jpg'''') or ((ExtFileName=''''.jpeg'''')) then
Add(dir+''''\''''+SearchRec.Name);
Found := FindNext(SearchRec);
end;
FindClose(SearchRec);
end;
procedure TImageFileList.Clear;
begin
FStrListFile.Clear;
Findex:=-1;
end;
constructor TImageFileList.Create;
begin
FStrListFile:=TStringList.Create;
Findex:=-1;
end;
destructor TImageFileList.Destroy;
begin
FStrListFile.Free;
inherited;
end;
function TImageFileList.GetCurFileName: string;
begin
result:=ExtractFileName(FStrListFile.Strings[Findex]);
end;
function TImageFileList.GetCurFullFileName: string;
begin
result:=FStrListFile.Strings[Findex];
end;
function TImageFileList.GetFileCount: integer;
begin
result:=FStrListFile.Count;
end;
function TImageFileList.GetIndex: integer;
begin
result:=FIndex;
end;
function TImageFileList.GetNextFileName: string;
begin
if Findex=FStrListFile.Count-1 then
Findex:=0
else
inc(Findex);
result:=FStrListFile.Strings[Findex];
end;
function TImageFileList.GetPreFileName: string;
begin
if Findex=0 then
Findex:=FStrListFile.Count-1
else
dec(Findex);
result:=FStrListFile.Strings[Findex];
end;
procedure TImageFileList.SetIndex(AIndex: integer);
begin
FIndex:=AIndex;
end;
3. 过程JpgToBmp及函数IsJpgFile的代码如下所示：
//转换jpg到bmp
procedure JpgToBmp(const JpgFileName:string;AJpg:TJpegImage;Abmp:Tbitmap);
begin
try
AJpg.LoadFromFile(JpgFileName);
Abmp.Assign(AJpg);
finally
end;
end;
//仅从扩展名上来判断是否是jpg格式的文件
function IsJpgFile( 上一页 [1] [2] [3] [4] [5] [6] 下一页 | 
