Delphi判断一个路径是目录还是文件

unit Unit1;

interface

uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
  Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    ListBox1: TListBox;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
    function IsFileOrDir(AFilePath: string): Integer;
    function ShowFileTabPath(AFilePath: string): string;
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
var
  SearchRec:TSearchRec;
  nResult:Integer;
const
  szFilePath='C:\Users\zhujq\Desktop\新建文件夹 (3)\*.*';
begin
  ListBox1.Clear; //填充ListBox
  nResult:=FindFirst(szFilePath,faAnyFile,SearchRec);  //查找第一个文件
  while nResult=0 do  //如果返回值为0表示找到文件
  begin
    ListBox1.Items.Add(ShowFileTabPath(ExtractFilePath(szFilePath)+SearchRec.Name));//将文件添加到ListBox,ExtractFilepath函数用于提取文件路径
    nResult:=FindNext(SearchRec);  //继续查找下一个文件，至到返回值不为0时
  end;

end;

function TForm1.IsFileOrDir(AFilePath: string): Integer;
var
  C: Cardinal;
begin
  Result := -1;
  C := GetFileAttributes(Pchar(AFilePath));//把string转换为PAnsiChar
  if C = $FFFFFFFF then
  begin
    // 文件或文件夹不存在
    Result := 0;
    Exit;
  end
  else if C and FILE_ATTRIBUTE_DIRECTORY <> 0 then
  begin
    // 是文件夹不是文件
    Result := 1;
    Exit;
  end
  else
  begin
     // 是文件
    Result := 2;
    Exit;
  end;
end;

function TForm1.ShowFileTabPath(AFilePath: string): string;
begin
  Result := '';
  case IsFileOrDir(AFilePath) of
    0:
    begin
      Result := AFilePath + '  0';
    end;
    1:
    begin
      Result := AFilePath + '  1';
    end;
    2:
    begin
      Result := AFilePath + '  2';
    end;
  end;
end;

end.