每日程炼-IOUtils 单元(4): TDirectory.GetDirectories获取子目录

最新推荐文章于 2020-04-28 22:02:05 发布

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本文介绍如何使用Delphi中的TDirectory类来获取指定目录下的文件和子目录，包括使用GetFileSystemEntries方法的不同选项，如过滤文件名前缀、搜索所有目录等。

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.

Demo下载：IOUnit4

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. 窗体部分： object Form1: TForm1 Left = 0 Top = 0 Caption = #24858#20154#31508#35760'-http://www.foolcode.com' ClientHeight = 327 ClientWidth = 388 Color = clBtnFace Font.Charset = DEFAULT_CHARSET Font.Color = clWindowText Font.Height = -11 Font.Name = 'Tahoma' Font.Style = [] OldCreateOrder = False PixelsPerInch = 96 TextHeight = 13 object Memo1: TMemo Left = 0 Top = 0 Width = 377 Height = 225 ImeName = #20013#25991'('#31616#20307') - '#25628#29399#25340#38899#36755#20837#27861 Lines.Strings = ( 'Memo1') TabOrder = 0 end object btn1: TButton Left = 8 Top = 248 Width = 145 Height = 25 Caption = 'GetFileSystemEntries' TabOrder = 1 OnClick = btn1Click end object btn2: TButton Left = 8 Top = 294 Width = 217 Height = 25 Caption = 'GetFileSystemEntries+soAllDirectories' TabOrder = 2 OnClick = btn2Click end object btn3: TButton Left = 192 Top = 248 Width = 169 Height = 25 Caption = 'GetFileSystemEntries+L*' TabOrder = 3 OnClick = btn3Click end object btn4: TButton Left = 248 Top = 294 Width = 129 Height = 25 Caption = 'SearchRec+function' TabOrder = 4 OnClick = btn4Click end end