如何在TTreeView中添家TTreeNode?

YinLi 2002-03-08 04:41:34

用代码怎样在一个完全空TreeView中添加第一个Node,哪位老兄帮帮忙？

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kuchong 2002-08-23

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note2:=treeview1.items.add(nil,'treenode_caption');
note2.imageindex:=0;//正常时节点图象
note2.selectedindex:=1;//选择该节点时的图象

yaxin_he 2002-08-23

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同意lotust(何化楠)

frankxu 2002-04-20

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var
topnode,firstchildnode: TTreeNode;

begin
topnode:=TreeView1.Items.ADD(NIL,'topnode');
firstchildnode:=TreeView1.Items.ADDChild(topnode,'fchildnode');
end;

撒加的天使 2002-04-20

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node2:=tree.addobject(nil,'Test1');

icesnowerls 2002-04-20

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同意 lt2000(狂剑客)

撒加的天使 2002-04-20

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var node1,node2:Ttreenode;

node1:=tree.selected;
node2:=tree.items.addobject(node1,'Test');
//在 node1 下面添加子接点
//应该是这个方法，如果不可以，可以看看帮助，，

lt2000 2002-04-20

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TreeView1.Items.ADD(NIL,'TEST')

sgs125 2002-04-20

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ADD 是增加同级节点
addchild是子节点，必须

add（节点位置，txt）
add（节点位置，text）

1、支持任意添加、修改、删除节点信息 2、支持节点间的任意拖曳 3、支持对操作结果的保存 4、提供了生产树的方法附：执行程序和源代码

对于ttreeview，在节点里要存储额外数据，一般都是使用node的data指针。该例子演示的是另外一个思路，通过自定义节点类来实现存储额外数据。节点类当然也可以是不同的类。

unit TreeViewFunctions; interface uses Windows, Messages, SysUtils, Variants, Classes, ComCtrls, Controls, Forms, FileCtrl, StrUtils, Masks, Vcl.OleCtrls, SHDocVw, IOUtils; procedure SaveTreeViewExplandState(TreeView: TTreeView; FileName: string); procedure LoadTreeViewExplandState(TreeView: TTreeView; FileName: string); function ExtractNewFolderPath(FileName: string; NewText: string): string; procedure HideHideHorizontalScrollBar(TreeView: TTreeView); function IsEmptyDir(sDir: String): Boolean; function AttachMentsExists(FileName: String): Boolean; procedure SetIcons(TreeView: TTreeView; list: TStringList); procedure EnumText(s: string; aItem: TTreeNode); function AttachmentsFolder(FileName: String): string; function ExtractNodeFullPath(TreeView: TTreeView): string; function Get_node_path(node: TTreeNode): string; function ExtractTreeViewFileName(RootPath: string; TreeView: TTreeView): string; /// /// Node.Selected := true; Node.Focused := true; /// /// /// Node.Selected := true; Node.Focused := true; /// /// /// Node.Selected := true; Node.Focused := true; /// function OpenFile(Path: string; RichEdit: TRichEdit; TreeView: TTreeView) : Boolean; overload; function OpenFile(Path: string; Webbrowser: TWebbrowser; TreeView: TTreeView) : Boolean; overload; procedure GetDirectories(Tree: TTreeView; Directory: string; Item: TTreeNode; IncludeFiles: Boolean); procedure DirToTreeView(Tree: TTreeView; Directory: string; Root: TTreeNode; IncludeFiles: Boolean; FileExt: string); procedure QSetPerpoty(TreeView: TTreeView); function ItemExist(Text: string; TreeView: TTreeView): Boolean; function RemoveDirs(folderPath: string): Boolean; function __RenameFile(OldName: string; Title: string): Boolean; function RenameFolder(filePath: string; Title: string): Boolean; var list: TStringList; implementation { // "D:\C++Builder学习大全中文版\index.htm" // "D:\C++Builder学习大全中文版\" // "index_files" // "D:\C++Builder学习大全中文版\index_files" var s, s1, s2: string; begin s := 'D:\C++Builder学习大全中文版\index.htm'; s1:=ExtractNewFolderPath(s,'_files'); s2 := ExtractNewFolderPath(s, '_AttachMents'); Memo1.lines.Add(s); Memo1.Lines.Add(s1); Memo1.lines.Add(s2); end; } function ExtractNewFolderPath(FileName: string; NewText: string): string; var _filesFolder: string; // "D:\C++Builder学习大全中文版\" _filesFolderName: string; // "index_files" _filesFolderPath: String; begin _filesFolder := ExtractFilePath(FileName); _filesFolderName := ChangeFileExt(ExtractFileName(FileName), '') + NewText; _filesFolderPath := _filesFolder + _filesFolderName; Result := _filesFolderPath; end; { SaveTreeViewExplandState(TreeView1,'TreeView.txt'); } procedure SaveTreeViewExplandState(TreeView: TTreeView; FileName: string); var list: TStringList; i: Integer; begin list := TStringList.Create; With TreeView do begin for i := 0 to Items.Count - 1 do begin if Items.Item[i].Expanded then list.Add(IntToStr(i)); end; list.Add(IntToStr(Selected.AbsoluteIndex)); end; list.SaveToFile(FileName); list.free; end; { LoadTreeViewExplandState(TreeView1, 'abc.txt'); } procedure LoadTreeViewExplandState(TreeView: TTreeView; FileName: string); var list: TStringList; i: Integer; node: TTreeNode; begin list := TStringList.Create; with list do begin list.LoadFromFile(FileName); for i := 0 to Count - 2 do // 最后一行放的是最后选中的那个节点索引 begin TreeView.Items[StrToInt(list[i])].Expand(False); end; node := TreeView.Items[StrToInt(list[Count - 1])]; TreeView.Select(TreeView.Items[StrToInt(list[Count - 1])], []); // node.Selected := True; // node.Focused := True; TreeView.SetFocus; TreeView.Focused; free; end; end; { FUNCTION ulong ShowScrollBar(ulong hwnd,ulong wBar,ulong bShow) LIBRARY "user32.dll" constant long SB_HORZ = 0 constant long SB_VERT = 1 constant long SB_BOTH = 3 } procedure HideHideHorizontalScrollBar(TreeView: TTreeView); begin // no responed NEW FORM TEST // ShowScrollBar(TreeView.Handle,SB_HORZ,False); end; // procedure // begin // { 当拖拽的高度不够的时候自动滚动滚动条 } // with TreeView1 do // begin // if (Y < 15) then // SendMessage(Handle, WM_VSCROLL, SB_LINEUP, 0) // else if (Height - Y < 15) then // SendMessage(Handle, WM_VSCROLL, SB_LINEDOWN, 0); // end; // end; { 返回附件文件夹 "D:\C++Builder学习大全中文版\新建文本文档.htm" D:\C++Builder学习大全中文版\新建文本文档_Attachments } function AttachmentsFolder(FileName: String): string; begin Result := ExtractFilePath(FileName) + ChangeFileExt(ExtractFileName(FileName), '') + '_Attachments'; end; function AttachMentsExists(FileName: String): Boolean; var f: string; begin f := ExtractFilePath(FileName) + ChangeFileExt(ExtractFileName(FileName), '') + '_Attachments'; Result := DirectoryExists(f); end; procedure EnumText(s: string; aItem: TTreeNode); var node: TTreeNode; str: string; begin node := aItem; while node nil do begin if s = '' then str := node.Text else str := s + '\' + node.Text; list.Add(str); /// ////////////////////////// if node.HasChildren then EnumText(str, node.getFirstChild); node := node.getNextSibling; end; end; function IsEmptyDir(sDir: String): Boolean; var sr: TSearchRec; begin Result := True; if Copy(sDir, Length(sDir) - 1, 1) '\' then sDir := sDir + '\'; if FindFirst(sDir + '*.*', faAnyFile, sr) = 0 then repeat if (sr.Name '.') and (sr.Name '..') then begin Result := False; break; end; until FindNext(sr) 0; FindClose(sr); end; { 是文件夹的设置为1 是文件的设置为 2 } procedure SetIcons(TreeView: TTreeView; list: TStringList); var i: Integer; begin with TreeView do begin for i := 0 to Items.Count - 1 do begin if DirectoryExists(list.Strings[i]) then begin Items[i].ImageIndex := 0; Items[i].SelectedIndex := 0; Items[i].StateIndex := 0; end; if FileExists(list.Strings[i]) then begin Items[i].ImageIndex := 1; Items[i].SelectedIndex := 1; Items[i].StateIndex := 1; end; if (AttachMentsExists(list.Strings[i])) then if not IsEmptyDir(AttachmentsFolder(list.Strings[i])) then begin // Form1.Memo1.LINES.Add( AttachmentsFolder(list.Strings[i])); Items[i].ImageIndex := 2; Items[i].SelectedIndex := 2; Items[i].StateIndex := 2; end; end; end; end; procedure QSetPerpoty(TreeView: TTreeView); begin with TreeView do begin // Align := alBottom; // Anchors := [akLeft, akTop, akBottom, akRight]; Items.Clear; // BorderStyle := bsNone; Cursor := crHandPoint; ReadOnly := True; ShowHint := True; RowSelect := True; ShowButtons := True; ShowRoot := True; ShowLines := False; SortType := stText; HideSelection := False; RightClickSelect := True; DragMode := dmAutomatic; // Color := RGB(238, 243, 246); end; end; { 实际重命名 C:\windows\test.txt C:\windows\csadsajas.txt MoveFile(PChar('C:\1.txt'),PChar('C:\ABC.txt')); if not __RenameFile('C:\tree.txt','TreeView') then Application.MessageBox('重命名文件失败','重命名',MB_ICONERROR); } { 重命名文件 } function __RenameFile(OldName: string; Title: string): Boolean; var NewName: string; begin NewName := Format('%s%s%s', [ExtractFilePath(OldName), Title, ExtractFileExt(OldName)]); Result := MoveFile(PChar(OldName), PChar(NewName)); end; // 重命名文件夹 // RenameFolder('C:\1\','2'); // MoveFile('C:\1','C:\2'); // MoveFile('C:\1\','C:\2\'); function RenameFolder(filePath: string; Title: string): Boolean; var s, s1: string; begin // filePath:='C:\Windows\System32\'; // s = ExtractFileDir(filepath) = 'C:\Windows\System32' s := ExtractFileDir(filePath); // s1 = ExtractFileDir(s) = 'C:\Windows' // s1 ='C:\Windows' +'\'+ titles s1 := ExtractFileDir(s) + '\' + Title; Result := MoveFile(PChar(s), PChar(s1)); end; { IOUtils } function RemoveDirs(folderPath: string): Boolean; begin Result := False; if TDirectory.IsEmpty(folderPath) then begin TDirectory.Delete(folderPath); Result := True; end else begin if Application.MessageBox('确定要删除这个文件夹吗? 删除后无法恢复！', '提示', MB_ICONQUESTION + MB_YESNO) = ID_YES then begin TDirectory.Delete(folderPath, True); Result := True; end; end; // if TDirectory.Exists(folderPath) then // begin // Application.MessageBox('删除文件失败'+#13#10+'文件正确被使用?','错误',MB_ICONERROR+MB_OK); // Result:=False; // end; end; { if not ItemExist('Edit1.Text',TreeView1) then TreeView1.Items.AddChild(Treeview1.Selected,'Edit1.Text'); } function ItemExist(Text: string; TreeView: TTreeView): Boolean; var i: Integer; begin Result := False; if (Trim(Text) '') then begin for i := 0 to TreeView.Items.Count - 1 do if Trim(Text) = Trim(TreeView.Items[i].Text) then begin Result := True; Exit; end; end; Result := False; end; // ------------------------------------------------------------------------------ { TreeView获得选中的完整路径 aaaa\ssss\bbbb } function ExtractNodeFullPath(TreeView: TTreeView): string; var Path: string; Parent: TTreeNode; // Node: TTreeNode; begin Path := TreeView.Selected.Text; Parent := TreeView.Selected.Parent; while Parent nil do begin Path := Parent.Text + '\' + Path; Parent := Parent.Parent; end; Result := Path; end; function Get_node_path(node: TTreeNode): string; var Path: string; TreeNode: TTreeNode; begin Path := node.Text; TreeNode := node.Parent; while TreeNode nil do begin Path := TreeNode.Text + '\' + Path; TreeNode := TreeNode.Parent; end; Result := Path; end; { 获得文件完整路径 C:\abc\int.cpp } function ExtractTreeViewFileName(RootPath: string; TreeView: TTreeView): string; var FileName: string; begin Result := ''; if TreeView.Selected = nil then Exit; FileName := RootPath + ExtractNodeFullPath(TreeView); // 当前选中的文件名 if not FileExists(FileName) then Exit; Result := FileName; end; { 用RICHEDIT打开TREEVIEW中的文件 } function OpenFile(Path: string; RichEdit: TRichEdit; TreeView: TTreeView) : Boolean; overload; var FileName: string; begin Result := False; FileName := ExtractTreeViewFileName(Path, TreeView); if FileExists(FileName) then begin RichEdit.Lines.LoadFromFile(FileName); Result := True; end end; function OpenFile(Path: string; Webbrowser: TWebbrowser; TreeView: TTreeView) : Boolean; overload; var FileName: string; begin Result := False; FileName := ExtractTreeViewFileName(Path, TreeView); if FileExists(FileName) then begin Webbrowser.Navigate(FileName); Result := True; end end; { 将1个目录里面所有的文件添加到TREEVIEW中 GetDirectories(TreeView1, 'D:\DATA', nil, True); } procedure GetDirectories(Tree: TTreeView; Directory: string; Item: TTreeNode; IncludeFiles: Boolean); var SearchRec: TSearchRec; ItemTemp: TTreeNode; begin Tree.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); Tree.Items.EndUpdate; end; end; { 将1个目录里面所有的文件添加到TREEVIEW中 DirToTreeView(TreeView1,'D:\Data\',nil,True,'.cpp'); } procedure DirToTreeView(Tree: TTreeView; Directory: string; Root: TTreeNode; IncludeFiles: Boolean; FileExt: string); var SearchRec: TSearchRec; Node1: TTreeNode; begin with Tree.Items do begin BeginUpdate; if Directory[Length(Directory)] '\' then Directory := Directory + '\'; if FindFirst(Directory + '*.*', faDirectory, SearchRec) = 0 then begin Application.ProcessMessages; repeat { 添加文件夹 } if (SearchRec.Attr and faDirectory = faDirectory) and (SearchRec.Name[1] '.') then begin if SameText(RightStr(SearchRec.Name, 12), '_AttachMents') then // 不添加 _AttachMents这个文件夹 Continue; if (SearchRec.Attr and faDirectory > 0) then Root := AddChild(Root, SearchRec.Name); Node1 := Root.Parent; DirToTreeView(Tree, Directory + SearchRec.Name, Root, IncludeFiles, FileExt); Root := Node1; end else if IncludeFiles then { 添加文件 } if SearchRec.Name[1] '.' then { .TXT .txt .TxT .tXT 为一样的 } if SameText(RightStr(SearchRec.Name, 4), FileExt) then { 只添加 .CPP格式文件 } AddChild(Root, SearchRec.Name); until FindNext(SearchRec) 0; FindClose(SearchRec) end; EndUpdate; end; end; end.

//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.

树形控件 Treeview控件中一个树形图由节点(TreeNode)和连接线组成。TtreeNode是TTreeview的基本组成单元。有全选、反选等功能。获取除父级之外的数据（Treeview没有isParent方法）

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