使用 ContentTypeProperties
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Aspose.Cells提供工作簿.ContentTypeProperties.Add 方法将自定义 ContentTypeProperties 添加到 excel 文件。您还可以通过设置ContentTypeProperty.IsNillable财产给真的.以下代码片段演示了将可选的自定义 ContentTypeProperties 添加到 excel 文件。下图显示了示例代码添加的两个属性。
附上示例代码生成的输出文件，供参考。
示例代码
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| // For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-Java | |
| // The path to the directories. | |
| String outputDir = Utils.Get_OutputDirectory(); | |
| Workbook workbook = new Workbook(FileFormatType.XLSX); | |
| int index = workbook.getContentTypeProperties().add("MK31", "Simple Data"); | |
| workbook.getContentTypeProperties().get(index).setNillable(false); | |
| index= workbook.getContentTypeProperties().add("MK32", "2019-10-17T16:00:00+00:00", "DateTime"); | |
| workbook.getContentTypeProperties().get(index).setNillable(false); | |
| workbook.save(outputDir + "WorkingWithContentTypeProperties_out.xlsx"); |