{"id":898,"date":"2025-05-16T10:23:00","date_gmt":"2025-05-16T01:23:00","guid":{"rendered":"https:\/\/dnetcore.ohwaki.jp\/wordpress\/?p=898"},"modified":"2025-11-13T15:05:32","modified_gmt":"2025-11-13T06:05:32","slug":"c14%e3%81%ae%e6%96%b0%e6%a9%9f%e8%83%bd%e4%b8%80%e9%83%a8","status":"publish","type":"post","link":"https:\/\/sumomo.ohwaki.jp\/wordpress\/?p=898","title":{"rendered":"C#14\u306e\u65b0\u6a5f\u80fd(\u4e00\u90e8)"},"content":{"rendered":"\n

.NET10\u3067C#\u30d0\u30fc\u30b8\u30e7\u30f3\u304c14\u3068\u306a\u308b\u3002C#14\u3067\u8a00\u8a9e\u4ed5\u69d8\u306b\u8ffd\u52a0\u3055\u308c\u305f\u90e8\u5206\u304b\u3089\u4f7f\u3048\u305d\u3046\u306a\u3082\u306e\u3092\u4e00\u90e8\u629c\u7c8b\u3057\u3066\u307f\u305f\u3002\u305f\u3060\u3057\u3001.NET10\u81ea\u4f53\u304cPreview\u7248\u306a\u306e\u3067\u3001\u4eca\u5f8c\u5909\u66f4\u3055\u308c\u308b\u3053\u3068\u304c\u3042\u308b\u304b\u3082\u3057\u308c\u306a\u3044\u70b9\u306f\u6ce8\u610f\u3057\u3066\u6b32\u3057\u3044\u3002\u5b9f\u969b\u306b\u8a66\u3057\u3066\u307f\u305f\u74b0\u5883\u306f.NET10 Preview4\u3067\u3042\u308b\u3002<\/p>\n\n\n\n

\u62e1\u5f35\u30e1\u30f3\u30d0\u30fc<\/strong><\/p>\n\n\n\n

\u62e1\u5f35\u30e1\u30f3\u30d0\u30fc\u306fC#13\u307e\u3067\u306e\u62e1\u5f35\u30e1\u30bd\u30c3\u30c9\u3092\u3088\u308a\u5206\u304b\u308a\u3084\u3059\u304f\u3057\u305f\u3082\u306e\u3002<\/p>\n\n\n\n

\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u611f\u3058\u3067\u5b9a\u7fa9\u53ef\u80fd\u3002<\/p>\n\n\n\n

\/\/ C# 14 \u62e1\u5f35\u30e1\u30f3\u30d0\u30fc\u5b9a\u7fa9\npublic static class MyExtensions {\n    \/\/ string\u578b\u5909\u6570\u306e\u62e1\u5f35\u30e1\u30f3\u30d0\u30fc\n    extension(string source) {\n        \/\/ \u6587\u5b57\u5217\u3092\u53cd\u8ee2\u3055\u305b\u308b\u62e1\u5f35\u30e1\u30bd\u30c3\u30c9\n        public string ReverseStr() => new string(source.Reverse().ToArray());\n        \/\/ \u6587\u5b57\u5217\u304c\u6570\u5b57\u5217\u304b\u3069\u3046\u304b\u3092\u5224\u5b9a\u3059\u308b\u62e1\u5f35\u30d7\u30ed\u30d1\u30c6\u30a3\n        public bool IsNumber => double.TryParse(source,out _);\n    }\n    \/\/ string\u306e\u62e1\u5f35static\u30e1\u30bd\u30c3\u30c9\n    extension(string) {\n        \/\/ string.IsAllZero(string)\u306e\u69d8\u306b\u4f7f\u7528\u3059\u308b\n        public static bool IsAllZero(string str) => str.All(c=>c=='0');\n    }\n}<\/code><\/pre><\/div>\n\n\n\n
extension(\u578b \u5909\u6570\u540d)\u69cb\u6587\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u6307\u5b9a\u578b\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u62e1\u5f35\u30e1\u30f3\u30d0\u30fc\u3092\u5b9a\u7fa9\u51fa\u6765\u308b\u3002\u307e\u305f\u3001extension(\u578b)\u69cb\u6587\u3092\u5229\u7528\u3057\u3001static\u30e1\u30bd\u30c3\u30c9\u3092\u5b9a\u7fa9\u3059\u308b\u3068\u3001\u6307\u5b9a\u578b\u306estatic\u30e1\u30bd\u30c3\u30c9\u3068\u306a\u308b\u3002
(\u3061\u306a\u307f\u306b\u3001extention(\u578b \u5909\u6570\u540d)\u30d6\u30ed\u30c3\u30af\u3067\u3001static\u30e1\u30bd\u30c3\u30c9\u3092\u5b9a\u7fa9\u3057\u3066\u3082\u578b\u306estatic\u30e1\u30bd\u30c3\u30c9\u306b\u306a\u308b\u3088\u3046\u3060\u3002\u305f\u3060\u3057\u3001\u4e0a\u8a18\u5909\u6570\u540d\u306fstatic\u30e1\u30bd\u30c3\u30c9\u4e2d\u3067\u306f\u4f7f\u7528\u3067\u304d\u306a\u3044\u3002)<\/p>\n\n\n\n
string s = "123.456";\nConsole.WriteLine(s.ReverseStr());\nConsole.WriteLine(s.IsNumber);\nConsole.WriteLine(string.IsAllZero(s));\n\/\/ \u7d50\u679c\n\/\/ 654.321\n\/\/ True\n\/\/ False<\/code><\/pre><\/div>\n\n\n\n
C#13\u307e\u3067\u306f\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30d7\u30ed\u30d1\u30c6\u30a3\u3084\u578b\u306estatic\u30e1\u30bd\u30c3\u30c9\u306f\u5b9a\u7fa9\u3067\u304d\u306a\u3044\u306e\u3067\u3061\u3087\u3063\u3068\u4fbf\u5229\u304b\u3082\u3002\u3082\u3061\u308d\u3093\u3001\u4eca\u307e\u3067\u901a\u308a\u306e\u5b9a\u7fa9\u3082\u53ef\u80fd\u3002<\/p>\n\n\n\n
\/\/ C# 13\u4ee5\u524d\u306e\u62e1\u5f35\u30e1\u30bd\u30c3\u30c9\u5b9a\u7fa9\npublic static class MyExtensions13 {\n    public static string ReverseStr13(this string source) {\n        return new string(source.Reverse().ToArray());\n    }\n}<\/code><\/pre><\/div>\n\n\n\n
field\u30ad\u30fc\u30ef\u30fc\u30c9<\/strong><\/p>\n\n\n\n
fileld\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30d0\u30c3\u30ad\u30f3\u30b0field\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u306a\u304f\u3001\u5165\u529b\u5024\u306e\u30c1\u30a7\u30c3\u30af\u3084\u5236\u9650\u3092\u304b\u3051\u308b\u3053\u3068\u304c\u53ef\u80fd\u3002<\/p>\n\n\n\n
\/\/ C# 14 field\u30ad\u30fc\u30ef\u30fc\u30c9\npublic class MyClass {\n    \/\/\/ <summary>\n    \/\/\/ Val\u30d7\u30ed\u30d1\u30c6\u30a3(\u8a2d\u5b9a\u3067\u304d\u308b\u6700\u5927\u9577\u3092\u5236\u9650\u3057\u3066\u3044\u308b)\n    \/\/\/ field\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u6307\u5b9a\u3059\u308c\u3070\u3001\u30d0\u30c3\u30ad\u30f3\u30b0field\u3092\u5ba3\u8a00\u3057\u306a\u304f\u3066\u3082\u3001\n    \/\/\/ \u5236\u9650\u7b49\u3092\u304b\u3051\u308b\u3053\u3068\u304c\u53ef\u80fd\u3002\n    \/\/\/ <\/summary>\n    public string? Val {\n        set => field = value?.Length > 5 ? value.Substring(0,5) : value;\n        get;\n    }\n}<\/code><\/pre><\/div>\n\n\n\n
var c = new MyClass();\nc.Val = "1234";\nConsole.WriteLine(c.Val);\nc.Val = "123456789";\nConsole.WriteLine(c.Val);\n\/\/ \u7d50\u679c\n\/\/ 1234\n\/\/ 12345<\/code><\/pre><\/div>\n\n\n\n
\u3061\u3087\u3063\u3068\u3057\u305f\u6a5f\u80fd\u8ffd\u52a0\u3060\u3051\u3069\u3001\u305d\u308c\u306a\u308a\u306b\u4f7f\u3048\u305d\u3046\u3002<\/p>\n\n\n\n
\u6700\u521d\u306b\u3082\u66f8\u3044\u305f\u304c\u3001Preview\u7248\u306a\u306e\u3067\u3001\u4eca\u5f8c\u5909\u66f4\u3055\u308c\u308b\u3053\u3068\u304c\u3042\u308b\u304b\u3082\u3057\u308c\u306a\u3044\u3002\u307e\u305f\u3001\u4e0a\u8a18\u306e\u6a5f\u80fd\u3092\u5b9f\u969b\u306b\u8a66\u3057\u305f\u3044\u5834\u5408\u3001.csproj\u306e<PropertyGroup><\/em><\/strong>\u306b<LangVersion>preview<\/LangVersion><\/em><\/strong>\u3092\u8ffd\u52a0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u306e\u3067\u6ce8\u610f\u3002<\/p>\n\n\n\n
<Project Sdk="Microsoft.NET.Sdk">\n\n  <PropertyGroup>\n    <OutputType>Exe<\/OutputType>\n    <TargetFramework>net10.0<\/TargetFramework>\n    <ImplicitUsings>enable<\/ImplicitUsings>\n    <Nullable>enable<\/Nullable>\n    <LangVersion>preview<\/LangVersion>\n  <\/PropertyGroup>\n\n<\/Project><\/code><\/pre><\/div>\n\n\n\n
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