fix(ExcelExport): Fixed hierarchical row dimensions export.

Author: gedinakova

projects/igniteui-angular/src/lib/services/excel/excel-exporter-grid.spec.ts

@@ -1461,7 +1461,7 @@ describe('Excel Exporter', () => {
         let grid: IgxPivotGridComponent;
 
         beforeEach(waitForAsync(() => {
-            options = createExportOptions('PivotGridGridExcelExport');
+            options = createExportOptions('PivotGridExcelExport');
         }));
 
         it('should export pivot grid', async () => {
@@ -1494,39 +1494,40 @@ describe('Excel Exporter', () => {
             fix.componentInstance.data = SALES_DATA;
             fix.componentInstance.pivotConfigHierarchy = {
                 rows: [
-                 {
-                    memberName: 'All_Srep Codes',
-                    enabled: true,
-                    width: '150px',
-                    childLevel: {
-                      memberName: 'SREP_CODE',
-                      displayName: 'Srep Code',
-                      sortDirection: 1,
-                      enabled: true,
-                    },
-                  },
-                  {
-                    memberName: 'All_Srep Code Alts',
-                    enabled: true,
-                    width: '150px',
-                    childLevel: {
-                      memberName: 'SREP_CODE_ALT',
-                      displayName: 'Srep Code Alt',
-                      sortDirection: 1,
+                    {
+                      memberName: 'All_Srep Code Alts',
                       enabled: true,
+                      width: '150px',
+                      childLevel: {
+                        memberName: 'SREP_CODE_ALT',
+                        displayName: 'Srep Code Alt',
+                        sortDirection: 1,
+                        enabled: true,
+                      },
                     },
-                  },
-                  {
-                    memberName: 'All_Customers',
-                    enabled: true,
-                    width: '150px',
-                    childLevel: {
-                      memberName: 'CUST_CODE',
-                      displayName: 'Customer',
-                      sortDirection: 1,
-                      enabled: true,
+                    {
+                        memberName: 'All_Srep Codes',
+                        enabled: true,
+                        width: '150px',
+                            childLevel: {
+                            memberName: 'SREP_CODE',
+                            displayName: 'Srep Code',
+                            sortDirection: 1,
+                            enabled: true,
+                        },
                     },
-                  }
+                    {
+                        // memberFunction: () => 'All Customers',
+                        memberName: 'All_Customers',
+                        enabled: true,
+                        width: '150px',
+                        childLevel: {
+                            memberName: 'CUST_CODE',
+                            displayName: 'Customer',
+                            sortDirection: 1,
+                            enabled: true,
+                        },
+                    }
                 ],
                 columns: [],
                 values: [
@@ -1557,7 +1558,7 @@ describe('Excel Exporter', () => {
             fix.detectChanges();
             await wait(300);
 
-            await exportAndVerify(grid, options, actualData.exportPivotGridDataWithHeaders, false);
+            await exportAndVerify(grid, options, actualData.exportPivotGridHierarchicalRowDimensions, false);
         });
 
         it('should export hierarchical pivot grid', async () => {

projects/igniteui-angular/src/lib/services/excel/excel-files.ts

@@ -632,7 +632,7 @@ export class WorksheetFile implements IExcelFile {
         for (const currentCol of headersForLevel) {
             const spanLength = isVertical ? currentCol.rowSpan : currentCol.columnSpan;
 
-            if (currentCol.level === i && currentCol.headerType !== ExportHeaderType.PivotMergedHeader) {
+            if (currentCol.level === i) {
                 let columnCoordinate;
                 const column = isVertical
                     ? this.rowIndex
@@ -644,7 +644,10 @@ export class WorksheetFile implements IExcelFile {
                 if (currentCol.headerType === ExportHeaderType.PivotRowHeader) {
                     rowCoordinate = startValue + 1;
                 }
-                const columnValue = dictionary.saveValue(currentCol.header, true, false);
+
+                const columnValue = currentCol.headerType === ExportHeaderType.PivotMergedHeader ? 
+                                        dictionary.saveValue(currentCol.field, true, true) :
+                                        dictionary.saveValue(currentCol.header, true, false);
 
                 columnCoordinate = (currentCol.field === GRID_LEVEL_COL
                     ? ExcelStrings.getExcelColumn(worksheetData.columnCount + 1)