在设置Style.Custom属性时检查自定义数字格式

可能的使用场景

如果你为 Style.setCustom(string) 方法分配了无效的自定义数字格式，Aspose.Cells for Node.js via C++ 不会抛出任何异常。但如果你希望 Aspose.Cells 检查所分配的自定义数字格式是否有效，请将 Workbook.getSettings().setCheckCustomNumberFormat(boolean) 方法设置为 true。

以下示例代码为 Style.setCustom(string) 方法分配了无效的自定义数字格式。由于我们已将 Workbook.getSettings().setCheckCustomNumberFormat(boolean) 方法设置为 true，因此会抛出异常，例如无效的数字格式。请阅读代码内的注释以获取更多帮助。

	const path = require("path");
	const AsposeCells = require("aspose.cells.node");

	// Create an instance of Workbook class
	const book = new AsposeCells.Workbook();

	// Setting this property to true will make Aspose.Cells to throw exception
	// when invalid custom number format is assigned to Style.Custom property
	book.getSettings().setCheckCustomNumberFormat(true);

	// Access first worksheet
	const sheet = book.getWorksheets().get(0);

	// Access cell A1 and put some number to it
	const cell = sheet.getCells().get("A1");
	cell.putValue(2347);

	// Access cell's style and set its Style.Custom property
	const style = cell.getStyle();

	// This line will throw exception if Workbook.Settings.CheckCustomNumberFormat is set to true
	style.setCustom("ggg @ fff"); //Invalid custom number format