Delphi 2010 新增功能之: IOUtils 单元(4): TDirectory.GetDirectories

和 TDirectory.GetFiles 用法一样, TDirectory.GetDirectories 是用来获取子目录的.

另外还有 TDirectory.GetFileSystemEntries 可同时获取文件与子目录, 用法都一样.

---

unit Unit1;



interface



uses

  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

  Dialogs, StdCtrls;



type

  TForm1 = class(TForm)

    Memo1: TMemo;

    Button1: TButton;

    Button2: TButton;

    Button3: TButton;

    Button4: TButton;

    procedure Button1Click(Sender: TObject);

    procedure Button2Click(Sender: TObject);

    procedure Button3Click(Sender: TObject);

    procedure Button4Click(Sender: TObject);

  end;



var

  Form1: TForm1;



implementation



{$R *.dfm}



uses IOUtils, Types;



const path = 'C:\Program Files\Embarcadero\RAD Studio\7.0';



//获取指定目录下的文件与子目录

procedure TForm1.Button1Click(Sender: TObject);

var

  dfs: TStringDynArray;

  str: string;

begin

  dfs := TDirectory.GetFileSystemEntries(path);

  Memo1.Clear;

  for str in dfs do Memo1.Lines.Add(str);

end;



//获取指定目录下的、名称是 L 开头的文件与子目录

procedure TForm1.Button2Click(Sender: TObject);

var

  dfs: TStringDynArray;

  str: string;

begin

  dfs := TDirectory.GetFileSystemEntries(path, 'L*');

  Memo1.Clear;

  for str in dfs do Memo1.Lines.Add(str);

end;



//获取指定目录及嵌套目录下的所有文件与子目录

procedure TForm1.Button3Click(Sender: TObject);

var

  dfs: TStringDynArray;

  str: string;

begin

  dfs := TDirectory.GetFileSystemEntries(path + '\source', TSearchOption.soAllDirectories, nil);

  Memo1.Clear;

  for str in dfs do Memo1.Lines.Add(str);

end;



//使用 TDirectory.TFilterPredicate 函数参数

procedure TForm1.Button4Click(Sender: TObject);

var

  dfs: TStringDynArray;

begin

  Memo1.Clear;

  dfs := TDirectory.GetFileSystemEntries(path,

    function(const Path: string; const SearchRec: TSearchRec): Boolean

    begin

      //这里可以有更多过滤条件或其他处理

      Memo1.Lines.Add(Path + '\' + SearchRec.Name);

    end

  );

end;



end.