准备工作: 1、在空白窗体上添加 TreeView1 和 Button1 2、激活窗体的 OnCreate 事件, 激活 TreeView 的 OnDblClick 事件 全部代码如下:
unit Unit1;interfaceuses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, ComCtrls, StdCtrls;type TForm1 = class(TForm) TreeView1: TTreeView; Button1: TButton; procedure FormCreate(Sender: TObject); procedure TreeView1DblClick(Sender: TObject); end;var Form1: TForm1;implementation{$R *.dfm}var arr1,arr2,arr3: array of TPoint;procedure TForm1.FormCreate(Sender: TObject);var i: Integer;begin {准备测试用的动态数组数据} SetLength(arr1, 2); SetLength(arr2, 3); SetLength(arr3, 4); for i := 0 to Length(arr1)-1 do begin arr1[i].X := i+1; arr1[i].Y := i+4; end; for i := 0 to Length(arr2)-1 do begin arr2[i].X := i+2; arr2[i].Y := i+5; end; for i := 0 to Length(arr3)-1 do begin arr3[i].X := i+3; arr3[i].Y := i+6; end; {添加到 TreeView} TreeView1.Items.Clear; TreeView1.Items.AddChildObject(nil, 'Note1', arr1); TreeView1.Items.AddChildObject(nil, 'Note2', arr2); TreeView1.Items.AddChildObject(nil, 'Note3', arr3); Button1.Caption := '重新装载数据'; Button1.OnClick := OnCreate;end;procedure TForm1.TreeView1DblClick(Sender: TObject);var node: TTreeNode; arr: array of TPoint;begin {获取当前节点} node := TreeView1.Selected; if not Assigned(node.Data) then begin ShowMessageFmt('%s 中没有携带其他数据', [node.Text]); Exit; end; {获取数组} arr := node.Data; {读取数组的第一个数据} ShowMessageFmt('%d, %d', [arr[0].X, arr[0].Y]); {清除数据指针} node.Data := nil; ShowMessageFmt('%s 中的数据已被删除!', [node.Text]);end;end.