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君君臣臣父父子子,看看Excel VBA中对象的层级和继承关系

  • 2026-04-07 23:01:34
君君臣臣父父子子,看看Excel VBA中对象的层级和继承关系

看看Excel VBA中对象的层级和继承关系

周易·序卦传》中认为:“有天地然后有万物,有万物然后有男女,有男女然后有夫妇,有夫妇然后有父子,有父子然后有君臣,有君臣然后有上下,有上下然后礼仪有所错(意为措置)。”在儒家思想里,“君君臣臣父父子子”勾勒出了清晰的人伦层级与从属关系,每个人在这种体系里都有着明确的定位。

有趣的是,这种“层级从属”的逻辑,在Excel VBA的世界里也是存在的,并并且贯穿着整个对象模型的始终。那些我们天天打交道的工作簿、工作表、单元格、图形、图表等等,所有元素都对应着一个“对象”,每个对象便如同一个人,这是一个不缺对象的世界!而,这些对象之间,也有着如同“君臣父子”一般清晰的继承关系。掌握对象的层级和继承关系,是解锁VBA高效编程的关键密码。

今天,我们通过一个实际的VBA需求,来看看Excel VBA中的“继承关系”,以及如何利用这种关系精准获取我们想要的对象信息。

一、需求描述

通过Application.InputBox(Type:=8)弹出交互式对话窗口,可以让用户点选单元格区域。但是,我们并不知道这个单元格(区域)来自哪个工作表、工作簿。

如何知道选择的单元格(区域)来自哪里呢?

二、问题分析

你或许以为可以这样:

Option ExplicitSub test()Dim rng As RangeDim str1$, str2$  Set rng = Application.InputBox("选择一个单元格或单元格区域。", _           "对象在哪里?"Type:=8)  str1 = ActiveSheet.Name  str1 = ActiveWorkbook.NameEnd Sub

代码中,试图通过激活的工作表(或工作簿)ActiveSheet来解决这个问题。但这种方法有个明显的漏洞——用户虽然可以在点选过程中手动切换工作表(或工作簿),导致ActiveSheet发生变化,但是当对话框关闭后,操作界面又会返回到原来的工作表,此时的ActiveSheet已非那时的ActiveSheet了!这样的结果与实际选择的并不一致,导致最终获取的信息出错。

如何才能准确获取这个单元格区域所属的工作表呢?

三、解决办法

其实,通过VBA的对象继承(从属)关系(关键属性:Parent),就可以轻松解决这个问题

执行Application.InputBox(Type:=8)语句后,找到自己中意的“对象”后,点“确定”返回,这样就可以返回一个单元格(或区域)的对象。再通过“Set rng”语句将对象与变量rng绑定,然后通过rng的Parent属性,一步一步地溯源,就可以知道他(rng单元格对象)的爹(工作表对象)是谁,以及他爹的爹(工作簿)是谁了。

就这么简单,请看代码:

Option ExplicitSub test()Dim rng As RangeDim str1$, str2$  Set rng = Application.InputBox("选择一个单元格或单元格区域。", _           "对象在哪里?"Type:=8)  str1 = "单元格的爹是谁?答:" & rng.Parent.Name  str2 = "单元格的爷是谁?答:" & rng.Parent.Parent.Name  MsgBox "你对象的地址是:" & rng.Address _          & vbCrLf & str1 & vbCrLf & str2, _          vbInformation, "恭喜,找对象成功!"End Sub

四、结果验证

在打开第4张工作表的情况下,运行代码,然后从第2张表中选择单元格,然后看看返回的结果是否符合要求。

结果正确,问题解决!

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  1. CONNECT:[ UseTime:0.000415s ] mysql:host=127.0.0.1;port=3306;dbname=h_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000667s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000309s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000301s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000639s ]
  6. SELECT * FROM `set` [ RunTime:0.000203s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000655s ]
  8. SELECT * FROM `article` WHERE `id` = 465395 LIMIT 1 [ RunTime:0.011384s ]
  9. UPDATE `article` SET `lasttime` = 1775625158 WHERE `id` = 465395 [ RunTime:0.011252s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000979s ]
  11. SELECT * FROM `article` WHERE `id` < 465395 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.002406s ]
  12. SELECT * FROM `article` WHERE `id` > 465395 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.006337s ]
  13. SELECT * FROM `article` WHERE `id` < 465395 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.027490s ]
  14. SELECT * FROM `article` WHERE `id` < 465395 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.075173s ]
  15. SELECT * FROM `article` WHERE `id` < 465395 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.031166s ]
0.241291s