避免输出PDF中的空白页在没有内容打印时
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可能的使用场景
当Excel文件为空且用户将其保存为PDF使用Aspose.Cells时,在输出PDF中会呈现空白页。有时,这种默认行为是不希望的。Aspose.Cells提供了PdfSaveOptions.OutputBlankPageWhenNothingToPrint属性来处理此问题。如果将其设置为false,则在输出PDF中没有打印内容时将会发生CellsException
当没有需要打印的内容时,避免在输出PDF中出现空白页
以下示例代码创建一个空工作簿,然后在将PdfSaveOptions.OutputBlankPageWhenNothingToPrint属性设置为false后将其保存为输出PDF。由于输出PDF中没有打印内容,将会发生如下CellsException。
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 | |
//Create empty workbook. | |
Workbook wb = new Workbook(); | |
//Create Pdf save options. | |
PdfSaveOptions opts = new PdfSaveOptions(); | |
//Default value of OutputBlankPageWhenNothingToPrint is true. | |
//Setting false means - Do not output blank page when there is nothing to print. | |
opts.setOutputBlankPageWhenNothingToPrint(false); | |
//Save workbook to Pdf format, it will throw exception because workbook has nothing to print. | |
ByteArrayOutputStream baos = new ByteArrayOutputStream(); | |
try | |
{ | |
wb.save(baos, opts); | |
} | |
catch(Exception ex) | |
{ | |
System.out.println("Exception Message: " + ex.getMessage()); | |
} |
异常
Exception in thread "main" com.aspose.cells.CellsException: There is nothing to output/print.
at com.aspose.cells.zcab.a(Unknown Source)
at com.aspose.cells.zcab.a(Unknown Source)
at com.aspose.cells.zcab.a(Unknown Source)
at com.aspose.cells.Workbook.a(Unknown Source)
at com.aspose.cells.Workbook.save(Unknown Source)