fix(ExcelExporter): Remove the null char from cell value

Author: gedinakova

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

@@ -144,6 +144,8 @@ describe('Excel Exporter', () => {
             'Dorothy H. Spencer'
         ], options);
 
+        wrapper.verifyStructure();
+        await wrapper.verifyTemplateFilesContent();
         await wrapper.verifyDataFilesContent(actualData.noHeadersStringDataWithNullChars);
     });
 

projects/igniteui-angular/src/lib/services/excel/test-data.service.spec.ts

@@ -1937,8 +1937,8 @@ export class FileContentData {
     }
 
     public get noHeadersStringDataWithNullChars() {
-        this._sharedStringsData = `count="6" uniqueCount="6"><si><t>Column1</t></si><si><t>Terrance\&#32;Orta</t></si>` +
-            `<si><t>Richard Mahoney\&#32;LongerName</t></si><si><t>Donna\&#32;Price</t></si><si><t>Lisa Landers</t></si><si><t>` +
+        this._sharedStringsData = `count="6" uniqueCount="6"><si><t>Column1</t></si><si><t>TerranceOrta</t></si>` +
+            `<si><t>Richard MahoneyLongerName</t></si><si><t>DonnaPrice</t></si><si><t>Lisa Landers</t></si><si><t>` +
             `Dorothy H. Spencer</t></si>`;
 
         this._tableData = `ref="A1:A6" totalsRowShown="0"><autoFilter ref="A1:A6"/><tableColumns count="1">` +

projects/igniteui-angular/src/lib/services/exporter-common/export-utilities.ts

@@ -69,8 +69,8 @@ export class ExportUtilities {
                               .replace(/>/g, '>')
                               .replace(/"/g, '"')
                               .replace(/'/g, ''')
-                              // Bug #14944 - Replace the not supported null character (\u0000, \x00) with a space
-                              .replace(/\0/g, ' ');
+                              // Bug #14944 - Remove the not supported null character (\u0000, \x00)
+                              .replace(/\x00/g, '');
         }
     }
 }