{"provider_name":"Hatena Blog","image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/b/baba_s/20180826/20180826160156.png","author_name":"baba_s","version":"1.0","title":"\u3010C#\u3011NPOI \u3067\u3069\u3093\u306a\u30bb\u30eb\u306e\u5024\u3082\u6587\u5b57\u5217\u3067\u53d6\u5f97\u3067\u304d\u308b\u62e1\u5f35\u30e1\u30bd\u30c3\u30c9","published":"2022-09-21 09:00:00","categories":["C#","C# - \u62e1\u5f35\u30e1\u30bd\u30c3\u30c9"],"url":"https://baba-s.hatenablog.com/entry/2022/09/21/090000","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fbaba-s.hatenablog.com%2Fentry%2F2022%2F09%2F21%2F090000\" title=\"\u3010C#\u3011NPOI \u3067\u3069\u3093\u306a\u30bb\u30eb\u306e\u5024\u3082\u6587\u5b57\u5217\u3067\u53d6\u5f97\u3067\u304d\u308b\u62e1\u5f35\u30e1\u30bd\u30c3\u30c9 - \u30b3\u30ac\u30cd\u30d6\u30ed\u30b0\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","height":"190","type":"rich","author_url":"https://blog.hatena.ne.jp/baba_s/","width":"100%","provider_url":"https://hatena.blog","blog_url":"https://baba-s.hatenablog.com/","blog_title":"\u30b3\u30ac\u30cd\u30d6\u30ed\u30b0","description":"\u62e1\u5f35\u30e1\u30bd\u30c3\u30c9 using NPOI.SS.UserModel; namespace Kogane { public static class ICellExtensionMethods { public static string GetValue( this ICell self ) { if ( self == null ) return string.Empty; return self.CellType switch { CellType.Numeric when DateUtil.IsCellDateFormatted( self ) => self.DateCellValue.To\u2026"}