在用 C++ 设置样式的 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.GetCustom() 属性分配了无效的自定义数字格式，Aspose.Cells 不会抛出任何异常。但是，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.GetCheckCustomNumberFormat() 属性设置为 true。

设置 Style.Custom 属性时检查自定义数字格式

以下示例代码为 Style.GetCustom() 属性分配了无效的自定义数字格式。由于我们已经将 Workbook.GetCheckCustomNumberFormat() 属性设置为 true，因此会抛出异常，例如：无效的数字格式。请查看代码中的注释以获取更多帮助。

示例代码

#include <iostream>
#include "Aspose.Cells.h"
using namespace Aspose::Cells;

int main()
{
    Aspose::Cells::Startup();

    // For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-C

    // Create an instance of Workbook class
    Workbook book;

    // 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
    Worksheet sheet = book.GetWorksheets().Get(0);

    // Access cell A1 and put some number to it
    Cell cell = sheet.GetCells().Get(u"A1");
    cell.PutValue(2347);

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

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

    std::cout << "Custom number format set." << std::endl;

    Aspose::Cells::Cleanup();
}