跟踪文档转换进度

可能的使用场景

有时转换大型Excel文件可能需要一些时间。在此期间,您可能希望显示文档转换进度,而不只是加载屏幕,以增强应用程序的可用性。Aspose.Cells支持通过提供IPageSavingCallback接口来跟踪文档转换进程。IPageSavingCallback接口提供了PageStartSavingPageEndSaving方法,您可以在自定义类中实现。还可以控制呈现哪些页面,如TestPageSavingCallback自定义类所示。

跟踪文档转换进度

以下代码示例加载源Excel文件并通过使用实现IPageSavingCallback接口的TestPageSavingCallback自定义类将其转换进度打印到控制台。

示例代码

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
//Source directory
string sourceDir = RunExamples.Get_SourceDirectory();
//Output directory
string outputDir = RunExamples.Get_OutputDirectory();
Workbook workbook = new Workbook(sourceDir + "PagesBook1.xlsx");
PdfSaveOptions pdfSaveOptions = new PdfSaveOptions();
pdfSaveOptions.PageSavingCallback = new TestPageSavingCallback();
workbook.Save(outputDir + "DocumentConversionProgress.pdf", pdfSaveOptions);

以下是TestPageSavingCallback自定义类的代码。

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
public class TestPageSavingCallback : IPageSavingCallback
{
public void PageStartSaving(PageStartSavingArgs args)
{
Console.WriteLine("Start saving page index {0} of pages {1}", args.PageIndex, args.PageCount);
//don't output pages before page index 2.
if (args.PageIndex < 2)
{
args.IsToOutput = false;
}
}
public void PageEndSaving(PageEndSavingArgs args)
{
Console.WriteLine("End saving page index {0} of pages {1}", args.PageIndex, args.PageCount);
//don't output pages after page index 8.
if (args.PageIndex >= 8)
{
args.HasMorePages = false;
}
}
}

控制台输出

Start saving page index 0 of pages 11</br>
End saving page index 0 of pages 11</br>
Start saving page index 1 of pages 11</br>
End saving page index 1 of pages 11</br>
Start saving page index 2 of pages 11</br>
End saving page index 2 of pages 11</br>
Start saving page index 3 of pages 11</br>
End saving page index 3 of pages 11</br>
Start saving page index 4 of pages 11</br>
End saving page index 4 of pages 11</br>
Start saving page index 5 of pages 11</br>
End saving page index 5 of pages 11</br>
Start saving page index 6 of pages 11</br>
End saving page index 6 of pages 11</br>
Start saving page index 7 of pages 11</br>
End saving page index 7 of pages 11</br>
Start saving page index 8 of pages 11</br>
End saving page index 8 of pages 11