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; interface uses 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]); {清空数组} SetLength(arr, 0); {清除数据指针} node.Data := nil; ShowMessageFmt(''%s 中的数据已被删除!'', [node.Text]); end; end. (责任编辑:admin)
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