MultiRow明细合并后，跨列跨行表头显示为多行/多列

我想在查询结果为空时，显示一条空的记录，但是数据行合并后，表头部分发生了变化。
需要在合并的MergeManager中对表头进行设置？
测试地址是
https://demo.grapecity.com.cn/wijmo/demos/Grid/MultiRow/LayoutDefinition/purejs

使用的代码是

1. import 'bootstrap.css';
   
2. import '@grapecity/wijmo.styles/wijmo.css';
   
3. import './styles.css';
   
4. //
   
5. import * as wjCore from '@grapecity/wijmo';
   
6. import * as wjInput from '@grapecity/wijmo.input';
   
7. import * as wjGridCore from '@grapecity/wijmo.grid';
   
8. import * as wjMultiRow from '@grapecity/wijmo.grid.multirow';
   
9. import { generateAppData } from './data';
   
10. //
    
11. document.readyState === 'complete' ? init() : window.onload = init;
    
12. //
    
13. function init() {
    
14.     let appData = generateAppData();
    
15.     let orders = appData.orders;
    
16.     let layoutDefs = appData.layoutDefs;
    
17.     let currentLayout = appData.layoutDefs.currentItem;
    
18. 
    
19.     orders = [];
    
20.     let initData = {};
    
21.     initData[currentLayout.def[0].cells[0].binding] = '检索数据不存在';
    
22.     orders.push(initData);
    
23.    
    
24.     let multirow = new wjMultiRow.MultiRow('#multirow', {
    
25.         itemsSource: orders,
    
26.         layoutDefinition: currentLayout.def
    
27.     });
    
28.     // multirow.rows.push(new wjMultiRow.Row());
    
29.    
    
30.     var mm = new wjGridCore.MergeManager(multirow);
    
31.     mm.getMergedRange = function (panel, r, c, clip = true) {
    
32.         if (panel.cellType == wjGridCore.CellType.Cell) {
    
33.             if (r % 2 == 0) {
    
34.                 return new wjGridCore.CellRange(r, 0, r + 2 - 1, panel.grid.columns.length - 1);
    
35.             } else {
    
36.                 return new wjGridCore.CellRange(r - (2 - 1), 0, r, panel.grid.columns.length - 1);
    
37.             }
    
38.         }
    
39.     };
    
40.     multirow.mergeManager = mm;
    
41. 
    
42.     let ldComboBox = new wjInput.ComboBox('#ldComboBox', {
    
43.         itemsSource: layoutDefs,
    
44.         displayMemberPath: 'name'
    
45.     });
    
46.     updateDescription();
    
47.     layoutDefs.currentChanged.addHandler(() => {
    
48.         currentLayout = appData.layoutDefs.currentItem;
    
49.         updateMultirow();
    
50.         updateDescription();
    
51.     });
    
52.     //
    
53.     function updateMultirow() {
    
54.         multirow.layoutDefinition = currentLayout.def;
    
55.     }
    
56.     //
    
57.     function updateDescription() {
    
58.         wjCore.setText(document.querySelector('#desc'), currentLayout.description);
    
59.     }
    
60. }
    

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您好，这个问题还需要一些时间调研，预计明天下午前回复。谢谢~