跟踪文档转换进度
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可能的使用场景
有时转换大型 visio 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仅仅是加载屏幕，以增强应用程序的可用性。 Aspose.Diagram 通过提供IPageSavingCallback接口支持跟踪文档转换过程。 IPageSavingCallback 接口提供了您可以在自定义类中实现的 PageStartSaving 和 PageEndSaving 方法。您还可以控制呈现哪些页面，如 T 中所示estDiagramPageSavingCallback自定义类。
跟踪文档转换进度
以下代码示例加载源文件 visio并使用测试页面保存回调实现 IPageSavingCallback 接口的自定义类。
示例代码
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| // For complete examples and data files, please go to https://github.com/aspose-diagram/Aspose.Diagram-for-Java | |
| // The path to the documents directory. | |
| String dataDir = Utils.getDataDir(DetectFormatfromInputStream.class); | |
| // Open the stream. Read only access to load a Visio diagram. | |
| String stream = new String(dataDir + "Drawing1.vsdx"); | |
| // detect file format using an input stream | |
| FileFormatInfo info = FileFormatUtil.detectFileFormat(stream); | |
| // get the detected file format | |
| System.out.println("The spreadsheet format is: " + info.getFileFormatType()); |
以下是代码测试图页面保存回调自定义类。
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| // For complete examples and data files, please go to https://github.com/aspose-diagram/Aspose.Diagram-for-Java | |
| // The path to the documents directory. | |
| String dataDir = Utils.getDataDir(DetectFormatfromInputStream.class); | |
| // Open the stream. Read only access to load a Visio diagram. | |
| String stream = new String(dataDir + "Drawing1.vsdx"); | |
| // detect file format using an input stream | |
| FileFormatInfo info = FileFormatUtil.detectFileFormat(stream); | |
| // get the detected file format | |
| System.out.println("The spreadsheet format is: " + info.getFileFormatType()); |
控制台输出
开始保存第 11 页的第 0 页索引
结束保存第 11 页的第 0 页索引
开始保存第 11 页的第 1 页索引
结束保存页面索引 1，共 11 页
开始保存第 11 页的第 2 页索引
结束保存第 11 页的第 2 页索引
开始保存第 11 页的第 3 页索引
结束保存第 11 页的第 3 页索引
开始保存第 11 页的第 4 页索引
结束保存页面索引 4，共 11 页
开始保存第 11 页的第 5 页索引
结束保存页面索引 5 of pages 11
开始保存第 11 页的第 6 页索引
结束保存页面索引 6 of pages 11
开始保存第 11 页的第 7 页索引
结束保存页面索引 7 of pages 11
开始保存第 11 页的第 8 页索引
结束保存页面索引 8，共 11 页