关于遍历文件夹在treeView中生成目录树！！！

Question

功能：指定文件夹路径，指定文件类型，在treeView中生成目录树，需要按文件夹分级。
请高手帮忙！！！

Answer 1

//显示任意一个目录的文件到TReeview中
unit uTreeViewDemo;interfaceuses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, ComCtrls, StdCtrls, FileCtrl;const
  SELDIRHELP = 1000;type
  TForm1 = class(TForm)
    TreeView1: TTreeView;
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    procedure GetDirectories(Tree: TTreeView; Directory: string; Item: TTreeNode;
                         IncludeFiles: Boolean);
    { Public declarations }
  end;var
  Form1: TForm1;implementation{$R *.dfm}procedure TForm1.GetDirectories(Tree: TTreeView; Directory: string; Item: TTreeNode;
                                IncludeFiles: Boolean);
var
  SearchRec: TSearchRec;
  ItemTemp: TTreeNode;
begin
  TreeView1.Items.BeginUpdate;
  if Directory[Length(Directory)] <> '\' then
    Directory := Directory + '\';
  if FindFirst(Directory + '*.*' , faDirectory, SearchRec) = 0 then
  begin
    repeat
      if (SearchRec.Attr and faDirectory = faDirectory) and (SearchRec.Name[1] <> '.') then
      begin
        if (SearchRec.Attr and faDirectory > 0) then
        Item := Tree.Items.AddChild(Item, SearchRec.Name);
        ItemTemp := Item.Parent;
        GetDirectories(Tree, Directory + SearchRec.Name, Item, IncludeFiles);
        Item := ItemTemp;
      end
      else
      if IncludeFiles then
      if SearchRec.Name[1] <> '.' then
        Tree.Items.AddChild(Item, SearchRec.Name);
    until FindNext(SearchRec) <> 0;
    FindClose(SearchRec);
    TreeView1.Items.EndUpdate;
  end;
end;procedure TForm1.Button1Click(Sender: TObject);
var
  strOpenDir: string;
begin  if SelectDirectory(strOpenDir, [sdAllowCreate, sdPerformCreate, sdPrompt],SELDIRHELP) then
  try
    GetDirectories(TreeView1, strOpenDir, nil, True);
  except
    ShowMessage('错误信息');
  end;
end;end.

Answer 2

用Delphi实现Windows文件夹管理树 李鹏 薛志东 程序清单下面的源代码在Windows98中实现，并在Windows2000测试版中测试无误(程序运行结果如图1所示)，有兴趣的读者可以将其改写成Delphi组件，以备常用。unit BrowseTreeView; interface uses Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs, ShlObj, ComCtrls; type PTreeViewItem = ^TTreeViewItem; TTreeViewItem = record ParentFolder: IShellFolder; // 接点对应的文件夹的父文件夹的IShellFolder接口 Pidl, FullPidl: PItemIDList; // 接点对应的文件夹的相对和绝对项目标识符列表 HasExpanded: Boolean; // 接点是否展开 end; 图1 程序运行结果 TForm1 = class(TForm) TreeView1: TTreeView; procedure FormDestroy(Sender: TObject); procedure FormCreate(Sender: TObject); procedure TreeView1Expanding(Sender: TObject; Node: TTreeNode; var AllowExpansion: Boolean); private FItemList: TList; procedure SetTreeViewImageList; procedure FillTreeView(Folder: IShellFolder; FullPIDL: PItemIDList; ParentNode: TTreeNode); end; var Form1: TForm1; implementation {$R *.DFM} uses ActiveX, ComObj, ShellAPI, CommCtrl; // 以下是几个对项目标识符进行操作的函数 procedure DisposePIDL(ID: PItemIDList); var Malloc: IMalloc; begin if ID = nil then Exit; OLECheck(SHGetMalloc(Malloc)); Malloc.Free(ID); end; function CopyItemID(ID: PItemIDList): PItemIDList; var Malloc: IMalloc; begin Result := nil; OLECheck(SHGetMalloc(Malloc)); if Assigned(ID) then begin Result := Malloc.Alloc(ID^.mkid.cb + sizeof(ID^.mkid.cb)); CopyMemory(Result, ID, ID^.mkid.cb + sizeof(ID^.mkid.cb)); end; end; function NextPIDL(ID: PItemIDList): PItemIDList; begin Result := ID; Inc(PChar(Result), ID^.mkid.cb); end; function GetPIDLSize(ID: PItemIDList): Integer; begin Result := 0; if Assigned(ID) then begin Result := sizeof(ID^.mkid.cb); while ID^.mkid.cb <> 0 do begin Inc(Result, ID^.mkid.cb); ID := NextPIDL(ID); end; end; end; function CreatePIDL(Size: Integer): PItemIDList; var Malloc: IMalloc; HR: HResult; begin Result := nil; HR := SHGetMalloc(Malloc); if Failed(HR) then Exit; try Result := Malloc.Alloc(Size); if Assigned(Result) then FillChar(Result^, Size, 0); finally end; end; function ConcatPIDLs(ID1, ID2: PItemIDList): PItemIDList; var cb1, cb2: Integer; begin if Assigned(ID1) then cb1 := GetPIDLSize(ID1) - sizeof(ID1^.mkid.cb) else cb1 := 0; cb2 := GetPIDLSize(ID2); Result := CreatePIDL(cb1 + cb2); if Assigned(Result) then begin if Assigned(ID1) then CopyMemory(Result, ID1, cb1); 
CopyMemory(PChar(Result) + cb1, ID2, cb2); end; end; // 将二进制表示的项目标识符列表转换成有可识的项目名 function GetDisplayName(Folder: IShellFolder; PIDL: PItemIDList; ForParsing: Boolean): String; var StrRet: TStrRet; P: PChar; Flags: Integer; begin Result := ''; if ForParsing then Flags := SHGDN_FORPARSING else Flags := SHGDN_NORMAL; Folder.GetDisplayNameOf(PIDL, Flags, StrRet); case StrRet.uType of STRRET_CSTR: SetString(Result, StrRet.cStr, lStrLen(StrRet.cStr)); STRRET_OFFSET: begin P := @PIDL.mkid.abID[StrRet.uOffset - sizeof(PIDL.mkid.cb)]; SetString(Result, P, PIDL.mkid.cb - StrRet.uOffset); end; STRRET_WSTR: Result := StrRet.pOleStr; end; end; function GetIcon(PIDL: PItemIDList; Open: Boolean): Integer; const IconFlag = SHGFI_PIDL or SHGFI_SYSICONINDEX or SHGFI_SMALLICON; var FileInfo: TSHFileInfo; Flags: Integer; begin if Open then Flags := IconFlag or SHGFI_OPENICON else Flags := IconFlag; 
SHGetFileInfo(PChar(PIDL), 0, FileInfo, sizeof(TSHFileInfo), Flags); Result := FileInfo.iIcon; end; // 获得每个文件夹在系统中的图标 procedure GetItemIcons(FullPIDL: PItemIDList; TreeNode: TTreeNode); begin with TreeNode do begin ImageIndex := GetIcon(FullPIDL, False); SelectedIndex := GetIcon(FullPIDL, True); end; end; // 获得系统的图标列表 procedure TForm1.SetTreeViewImageList; var ImageList: THandle; FileInfo: TSHFileInfo; begin ImageList := SHGetFileInfo(PChar('C:\'), 0, FileInfo, sizeof(TSHFileInfo), SHGFI_SYSICONINDEX or SHGFI_SMALLICON); if ImageList <> 0 then TreeView_SetImageList(TreeView1.Handle, ImageList, 0); end; // 生成文件夹管理树 procedure TForm1.FillTreeView(Folder: IShellFolder; FullPIDL: PItemIDList; ParentNode: TTreeNode); var TreeViewItem: PTreeViewItem; EnumIDList: IEnumIDList; PIDLs, FullItemPIDL: PItemIDList; NumID: LongWord; ChildNode: TTreeNode; Attr: Cardinal; begin try OLECheck(Folder.EnumObjects(Handle, SHCONTF_FOLDERS, EnumIDList)); while EnumIDList.Next(1, PIDLs, NumID) = S_OK do begin FullItemPIDL := ConcatPIDLs(FullPIDL, PIDLs); TreeViewItem := New(PTreeViewItem); TreeViewItem.ParentFolder := Folder; TreeViewItem.Pidl := CopyItemID(PIDLs); TreeViewItem.FullPidl := FullItemPIDL; TreeViewItem.HasExpanded := False; FItemList.Add(TreeViewItem); ChildNode := TreeView1.Items.AddChildObject(ParentNode, GetDisplayName(Folder, PIDLs, False), TreeViewItem); GetItemIcons(FullItemPIDL, ChildNode); Attr := SFGAO_HASSUBFOLDER or SFGAO_FOLDER; Folder.GetAttributesOf(1, PIDLs, Attr); if Bool(Attr and (SFGAO_HASSUBFOLDER or SFGAO_FOLDER)) then if Bool(Attr and SFGAO_FOLDER) then if Bool(Attr and SFGAO_HASSUBFOLDER) then ChildNode.HasChildren := True; end; except // 你可在此处对异常进行处理 end; end; procedure TForm1.FormDestroy(Sender: TObject); var I: Integer; begin try for I := 0 to FItemList.Count-1 do begin DisposePIDL(PTreeViewItem(FItemList[i]).PIDL); DisposePIDL(PTreeViewItem(FItemList[i]).FullPIDL); end; FItemList.Clear; FItemList.Free; except end; end; procedure TForm1.FormCreate(Sender: TObject); var Folder: IShellFolder; begin SetTreeViewImageList; OLECheck(SHGetDesktopFolder(Folder)); FItemList := TList.Create; FillTreeView(Folder, nil, nil); end; procedure TForm1.TreeView1Expanding(Sender: TObject; Node: TTreeNode; var AllowExpansion: Boolean); var TVItem: PTreeViewItem; SHFolder: IShellFolder; begin TVItem := PTreeViewItem(Node.Data); if TVItem.HasExpanded then Exit; OLECheck(TVItem.ParentFolder.BindToObject(TVItem^.Pidl, nil, IID_IShellFolder, Pointer(SHFolder))); FillTreeView(SHFolder, TVItem^.FullPidl, Node); Node.AlphaSort; TVItem^.HasExpanded := True; end; end.

Answer 3

怎样用Treeview对满足条件的文件进行遍历（非数据库） 
主要解答者: zswang 提交人: qxj 
感谢: zswang、zswang 
审核者: qxj 社区对应贴子: 查看 
     A :    uses  ShellApi,  FileCtrl;
{$R *.dfm}
function  GetSystemImageList(mImageList:  TImageList):  Boolean;
{  返回系统图标到图形列表中是否成功  }
var
   vHandle:  THandle;
   vSHFileInfo:  TSHFileInfo;
begin
   FillChar(vSHFileInfo,  SizeOf(vSHFileInfo),  0);  
   vHandle  :=  SHGetFileInfo('',  0,  vSHFileInfo,  SizeOf(vSHFileInfo),
       SHGFI_SYSICONINDEX  or  SHGFI_SMALLICON);
   Result  :=  vHandle  <>  0;
   mImageList.Handle  :=  vHandle;
   mImageList.ShareImages  :=  True;  
end;  {  GetSystemImageList  }function  GetIconIndex(mPath:  string):  Integer;
{  返回文件或路径所对应的图标序号  }  
var
   vSHFileInfo:  TSHFileInfo;  
begin  
   FillChar(vSHFileInfo,  SizeOf(vSHFileInfo),  0);  
   SHGetFileInfo(PChar(mPath),  0,  vSHFileInfo,  SizeOf(vSHFileInfo),  
       SHGFI_SYSICONINDEX);
   Result  :=  vSHFileInfo.iIcon;
end;  {  GetIconIndex  }  procedure  PathToTreeNode(mDirName:  string;  mTreeView:  TTreeView;
   mTreeNode:  TTreeNode);  
{  返回目录转换成菜单项是否成功  }  
var
   vSearchRec:  TSearchRec;  
   vPathName:  string;  
   K:  Integer;  
   vTreeNode:  TTreeNode;
begin  
   if  not  Assigned(mTreeView)  then  Exit;  
   vPathName  :=  mDirName  +  '\*.*';  
   K  :=  FindFirst(vPathName,  faAnyFile,  vSearchRec);
   while  K  =  0  do  begin  
       if  (vSearchRec.Attr  and  faDirectory  <>  0)  and  
           (Pos(vSearchRec.Name,  '..')  =  0)  then  begin  
           vTreeNode  :=  mTreeView.Items.AddChild(mTreeNode,  vSearchRec.Name);
           vTreeNode.ImageIndex  :=  GetIconIndex(mDirName  +  '\'  +  vSearchRec.Name);
           PathToTreeNode(mDirName  +  '\'  +  vSearchRec.Name,  mTreeView,  vTreeNode)
       end  else  if  (Pos(vSearchRec.Name,  '..')  =  0)  then  begin  
           vTreeNode  :=  mTreeView.Items.AddChild(mTreeNode,  '['  +  vSearchRec.Name  +  ']');  
           vTreeNode.ImageIndex  :=  GetIconIndex(mDirName  +  '\'  +  vSearchRec.Name);
       end;  
       K  :=  FindNext(vSearchRec);
   end;
   FindClose(vSearchRec);
end;  {  PathToTreeNode  }procedure  TForm1.FormCreate(Sender:  TObject);
begin
   GetSystemImageList(ImageList1);
   treeview1.Images:=imagelist1;
end;procedure  TForm1.Button1Click(Sender:  TObject);  
var  
   vDirectory:  string;
begin
   if  not  SelectDirectory('Select  Directory',  '',  vDirectory)  then  Exit;
   TreeView1.Items.BeginUpdate;
   try
       TreeView1.Items.Clear;
       PathToTreeNode(vDirectory,  TreeView1,  TreeView1.TopItem);
   finally
       TreeView1.Items.EndUpdate;  
   end;
end;

Answer 4

更简单的
下面的这个函数就可以了：
procedure DirToTreeView(Tree: TTreeView; Directory: string; Root: TTreeNode; IncludeFiles:
  Boolean);
var
  SearchRec         : TSearchRec;
  ItemTemp          : TTreeNode;
begin
  with Tree.Items do
  try
    BeginUpdate;
    if Directory[Length(Directory)] <> '\' then Directory := Directory + '\';
    if FindFirst(Directory + '*.*', faDirectory, SearchRec) = 0 then
    begin
      repeat
        if (SearchRec.Attr and faDirectory = faDirectory) and (SearchRec.Name[1] <> '.') then
        begin
          if (SearchRec.Attr and faDirectory > 0) then
            Root := AddChild(Root, SearchRec.Name);
          ItemTemp := Root.Parent;
          DirToTreeView(Tree, Directory + SearchRec.Name, Root, IncludeFiles);
          Root := ItemTemp;
        end
        else if IncludeFiles then
          if SearchRec.Name[1] <> '.' then
            AddChild(Root, SearchRec.Name);
      until FindNext(SearchRec) <> 0;
      FindClose(SearchRec);
    end;
  finally
    EndUpdate;
  end;
end;