关于遍历文件夹在treeView中生成目录树！！！

#1

//显示任意一个目录的文件到TReeview中
unit uTreeViewDemo;

interface

uses
  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.

#2

用Delphi实现Windows文件夹管理树

* 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.

#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;

#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;

秒客网

关于遍历文件夹在treeView中生成目录树！！！

4 个解决方案

#1

#2

#3

#4

#1

#2

#3

#4

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