foreach\u6587\u3078\u306e\u66f8\u304d\u63db\u3048<\/b><\/li>\n<\/ul>\n<\/div>\n\u306a\u3069\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u304b\u3089\u5fdc\u7528\u7684\u306a\u4f7f\u3044\u65b9\u306e\u5185\u5bb9\u306b\u3064\u3044\u3066\u3082\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n
\u4eca\u56de\u306fLINQ\u306eSelect\u30e1\u30bd\u30c3\u30c9\u306b\u3064\u3044\u3066\u3001\u4f7f\u3044\u65b9\u3092\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3057\u307e\u3059\uff01<\/p>\n
Select\u30e1\u30bd\u30c3\u30c9\u3068\u306f<\/h2>\n
LINQ\u306eSelect\u30e1\u30bd\u30c3\u30c9\u3068\u306f\u3001\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u8981\u7d20\u5168\u3066\u3092\u51e6\u7406\u3057\u3066\u5225\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u6e21\u3059\u3068\u304d\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n
\u3061\u306a\u307f\u306bLINQ\u3068\u306f\u30b3\u30ec\u30af\u30b7\u30e7\u30f3(\u914d\u5217\u3084List\u3001Dictionary\u306a\u3069)\u306e\u8981\u7d20\u3092\u51e6\u7406\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u3092\u96c6\u3081\u305f\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u3059\u3002<\/p>\n
LINQ\u3092\u4f7f\u3046\u3068\u3001for\u6587\u3084foreach\u6587\u3092\u4f7f\u3063\u305f\u30eb\u30fc\u30d7\u51e6\u7406\u3092\u7c21\u6f54\u306b\u4ee3\u66ff\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
Select\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9<\/h3>\n
Select\u30e1\u30bd\u30c3\u30c9\u306f\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304b\u3089\u547c\u3073\u51fa\u3057\u3066\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
Select\u30e1\u30bd\u30c3\u30c9\u306e\u5f15\u6570\u306b\u306f\u30e9\u30e0\u30c0\u5f0f\u3067\u51e6\u7406\u3092\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n
\u30e9\u30e0\u30c0\u5f0f\u3068\u306f\u3001\u4e00\u8a00\u3067\u8a00\u3046\u3068\u300c\u30e1\u30bd\u30c3\u30c9\u3092\u5909\u6570\u3068\u540c\u69d8\u306b\u6271\u3046\u8a18\u8ff0\u69d8\u5f0f<\/b>\u300d\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
\u30e9\u30e0\u30c0\u5f0f\u306e\u57fa\u672c\u69cb\u6587\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
\u5de6\u8fba => \u53f3\u8fba<\/pre>\n\u5de6\u8fba\u306b\u306f\u3001\u30e1\u30bd\u30c3\u30c9\u306e\u5909\u6570\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n
\u30d1\u30e9\u30e1\u30fc\u30bf\u306f\u300c( )\u300d\u3067\u56f2\u3080\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u5909\u6570\u304c1\u3064\u306e\u307f\u306e\u5834\u5408\u306f\u300c( )\u300d\u3092\u7701\u7565\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u5909\u6570\u304c\u8907\u6570\u306e\u5834\u5408\u306f\u3001\u5404\u5909\u6570\u3092\u300c,\u300d(\u30ab\u30f3\u30de)\u3067\u533a\u5207\u308a\u307e\u3059\u3002<\/p>\n
() => \u53f3\u8fba \/\/ \u5909\u6570\u306a\u3057\u306e\u5834\u5408\r\nparam => \u53f3\u8fba \/\/ \u5909\u6570\u304c1\u3064\u306e\u5834\u5408\r\n(param1, param2) => \u53f3\u8fba \/\/ \u5909\u6570\u304c2\u3064\u306e\u5834\u5408<\/pre>\n\u5909\u6570\u306e\u578b\u306f\u30b3\u30f3\u30d1\u30a4\u30e9\u306b\u3088\u3063\u3066\u81ea\u52d5\u7684\u306b\u63a8\u8ad6\u3055\u308c\u307e\u3059\u3002<\/p>\n
\u5fc5\u8981\u3067\u3042\u308c\u3070\u578b\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n
(int param) => \u53f3\u8fba \/\/ \u5909\u6570\u3092int\u578b\u3067\u6307\u5b9a<\/pre>\n\u305d\u308c\u3067\u306fSelect\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u3001\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
Select\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\u305f\u3081\u3001using\u30c7\u30a3\u30ec\u30af\u30c6\u30a3\u30d6\u3092\u4f7f\u3063\u3066System.Linq\u3092\u53c2\u7167\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
using System;\r\nusing System.Linq;\r\n\r\nnamespace Sample\r\n{\r\n class Sample\r\n {\r\n static void Main()\r\n {\r\n int[] src = {0, 1, 2, 3, 4, 5};\r\n \r\n var query = src.Select(x => x % 3);\r\n Console.WriteLine(\"[{0}]\", string.Join(\", \", query));\r\n \r\n Console.ReadKey();\r\n }\r\n }\r\n}<\/pre>\n\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
[0, 1, 2, 0, 1, 2]<\/pre>\n\u3053\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u306f\u3001Select\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066int\u578b\u306e\u914d\u5217src\u306e\u8981\u7d20\u3092\u51e6\u7406\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u8981\u7d20\u306e\u51e6\u7406\u3068\u3057\u3066\u30013\u3067\u5272\u3063\u305f\u4f59\u308a\u3092\u7b97\u51fa\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u3053\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u306e\u3088\u3046\u306b\u3001for\u6587\u3084foreach\u6587\u3092\u4f7f\u3063\u3066\u8981\u7d20\u30921\u3064\u305a\u3064\u51e6\u7406\u3059\u308b\u5fc5\u8981\u304c\u306a\u304f\u7c21\u6f54\u306b\u8a18\u8ff0\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u3066\u3044\u307e\u3059\u3002<\/p>\n
SelectMany\u30e1\u30bd\u30c3\u30c9\u3068\u306f<\/h3>\n
Select\u30e1\u30bd\u30c3\u30c9\u3068\u4f3c\u305f\u51e6\u7406\u3092\u884c\u3046SelectMany\u30e1\u30bd\u30c3\u30c9\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
SelectMany\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\u30681\u3064\u306e\u30b7\u30fc\u30b1\u30f3\u30b9\u306b\u5e73\u5766\u5316\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u5e73\u5766\u5316\u306b\u3064\u3044\u3066\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u4f7f\u3063\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n
using System;\r\nusing System.Collections.Generic;\r\nusing System.Linq;\r\n\r\nnamespace Sample\r\n{\r\n class Quarter\r\n {\r\n public string Period { get; set; }\r\n public List<String> Months { get; set; } \r\n }\r\n \r\n class Sample\r\n {\r\n static void Main()\r\n {\r\n Quarter[] quarter = {\r\n new Quarter{Period = \"1st\", Months = new List<string>{\"Jan\", \"Feb\", \"Mar\"}}, \r\n new Quarter{Period = \"2nd\", Months = new List<string>{\"Apr\", \"May\", \"Jun\"}}, \r\n new Quarter{Period = \"3rd\", Months = new List<string>{\"Jul\", \"Aug\", \"Sep\"}}, \r\n new Quarter{Period = \"4th\", Months = new List<string>{\"Oct\", \"Nov\", \"Dec\"}}\r\n };\r\n \r\n var query = quarter.SelectMany(x => x.Months);\r\n Console.WriteLine(\"[{0}]\", string.Join(\", \", query));\r\n \r\n Console.ReadKey();\r\n }\r\n }\r\n}<\/pre>\n\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
[Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec]<\/pre>\n\u3053\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u306f\u3001SelectMany\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\uff11\u3064\u306e\u30b7\u30fc\u30b1\u30f3\u30b9\u306b\u5e73\u5766\u5316\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u306eQuarter\u30af\u30e9\u30b9\u3067\u306f\u30e1\u30f3\u30d0\u30fc\u306bList\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002\u3053\u306eQuarter\u30af\u30e9\u30b9\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8981\u7d20\u306b\u6301\u3064\u914d\u5217quarter\u304b\u3089SelectMany\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
SelectMany\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u914d\u5217quarter\u306e\u8981\u7d20\u5185\u306eList\u306e\u8981\u7d20\u3092\u5168\u3066\u53d6\u5f97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u3053\u306e\u3088\u3046\u306b\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u8981\u7d20\u5185\u306e\u8981\u7d20\u3092\u5168\u3066\u540c\u3058\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u8981\u7d20\u306b\u683c\u7d0d\u3059\u308b\u3053\u3068\u3092\u5e73\u5766\u5316\u3068\u8a00\u3044\u307e\u3059\u3002<\/p>\n
Where\u30aa\u30da\u30ec\u30fc\u30bf\u3068\u306f<\/h2>\n
Where\u30aa\u30da\u30ec\u30fc\u30bf\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u6761\u4ef6\u3092\u6e80\u8db3\u3059\u308b\u8981\u7d20\u306e\u307fSelect\u30e1\u30bd\u30c3\u30c9\u3067\u51e6\u7406\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
Where\u30aa\u30da\u30ec\u30fc\u30bf\u306e\u4f7f\u3044\u65b9<\/h3>\n
Where\u30aa\u30da\u30ec\u30fc\u30bf\u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
Where\u30aa\u30da\u30ec\u30fc\u30b7\u30e7\u30f3\u306e\u5f15\u6570\u3082Select\u30e1\u30bd\u30c3\u30c9\u306e\u5f15\u6570\u3068\u540c\u3058\u3088\u3046\u306b\u30e9\u30e0\u30c0\u5f0f\u3067\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n
using System;\r\nusing System.Linq;\r\n\r\nnamespace Sample\r\n{\r\n class Sample\r\n {\r\n static void Main()\r\n {\r\n int[] src = {0, 1, 2, 3, 4, 5};\r\n \r\n var query = src\r\n .Where(x => x > 1)\r\n .Select(x => x % 3);\r\n Console.WriteLine(\"[{0}]\", string.Join(\", \", query));\r\n \r\n Console.ReadKey();\r\n }\r\n }\r\n}<\/pre>\n\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
[2, 0, 1, 2]<\/pre>\n\u3053\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u306f\u3001Where\u30aa\u30da\u30ec\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u3063\u3066\u914d\u5217src\u306e\u8981\u7d20\u304b\u30891\u3088\u308a\u5927\u304d\u306a\u8981\u7d20\u306e\u307fSelect\u30e1\u30bd\u30c3\u30c9\u3067\u51e6\u7406\u3092\u884c\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n
Where\u30aa\u30da\u30ec\u30fc\u30bf\u3067\u8907\u6570\u6761\u4ef6<\/h3>\n
Where\u30aa\u30da\u30ec\u30fc\u30bf\u3067\u306f\u5f15\u6570\u3067\u8907\u6570\u306e\u6761\u4ef6\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
AND\u6761\u4ef6\u3092\u6307\u5b9a\u3059\u308b\u65b9\u6cd5\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n
using System;\r\nusing System.Linq;\r\n\r\nnamespace Sample\r\n{\r\n class Sample\r\n {\r\n static void Main()\r\n {\r\n int[] src = {0, 1, 2, 3, 4, 5};\r\n \r\n var query = src\r\n .Where(x => x > 1 && x < 5)\r\n .Select(x => x % 3);\r\n Console.WriteLine(\"[{0}]\", string.Join(\", \", query));\r\n \r\n Console.ReadKey();\r\n }\r\n }\r\n}<\/pre>\n\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
[2, 0, 1]<\/pre>\n\u3053\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u306f\u3001Where\u30aa\u30da\u30ec\u30fc\u30bf\u3067AND\u6761\u4ef6\u300c&&\u300d\u3092\u4f7f\u3063\u3066\u6307\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
foreach\u6587\u3078\u306e\u66f8\u304d\u63db\u3048<\/h2>\n
Select\u30e1\u30bd\u30c3\u30c9\u3084Where\u30aa\u30da\u30ec\u30fc\u30bf\u3092\u4f7f\u3063\u305f\u8a18\u8ff0\u306b\u3064\u3044\u3066\u3054\u7d39\u4ecb\u3057\u3066\u304d\u307e\u3057\u305f\u304c\u3001\u3053\u308c\u3092foreach\u6587\u3067\u66f8\u304f\u3068\u3069\u306e\u3088\u3046\u306b\u306a\u308b\u304b\u3054\u7d39\u4ecb\u3057\u3066\u304a\u304d\u307e\u3059\u3002<\/p>\n
using System;\r\n\r\nnamespace Sample\r\n{\r\n class Sample\r\n {\r\n static void Main()\r\n {\r\n int[] src = {0, 1, 2, 3, 4, 5};\r\n \r\n foreach(int num in src) {\r\n if(num > 1 && num < 5) {\r\n int mod = num % 3;\r\n Console.WriteLine(\"{0}\", mod);\r\n }\r\n }\r\n \r\n Console.ReadKey();\r\n }\r\n }\r\n}<\/pre>\n\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
2\r\n0\r\n1<\/pre>\nLINQ\u306eSelect\u30e1\u30bd\u30c3\u30c9\u3084Where\u30aa\u30da\u30ec\u30fc\u30bf\u3092\u4f7f\u3046\u5834\u5408\u306b\u6bd4\u3079\u3066\u3084\u306f\u308a\u8a18\u8ff0\u306e\u624b\u9593\u304c\u5897\u3048\u3066\u3044\u307e\u3059\u306d\u3002<\/p>\n
foreach\u6587\u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u306f\u3053\u3061\u3089\u3067\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3066\u3044\u307e\u3059\u306e\u3067\u3001\u305c\u3072\u53c2\u8003\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n \n \n
\n
\n
![](\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2018\/01\/c_foreach-150x86.jpg\")
\n <\/div>\n
\n
\u3010C#\u5165\u9580\u3011foreach\u306e\u4f7f\u3044\u65b9(break\u3001continue\u3067\u306e\u5236\u5fa1\u3082\u89e3\u8aac)<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n \n
\u307e\u3068\u3081<\/h2>\n
\u3053\u3053\u3067\u306f\u3001LINQ\u306eSelect\u30e1\u30bd\u30c3\u30c9\u3084Where\u30aa\u30da\u30ec\u30fc\u30bf\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3057\u305f\u3002<\/p>\n
\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u8981\u7d20\u3092\u64cd\u4f5c\u3059\u308b\u5834\u5408\u306b\u3001for\u6587\u3084foreach\u6587\u306b\u6bd4\u3079\u3066\u7c21\u6f54\u306b\u8a18\u8ff0\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u4f7f\u3044\u3053\u306a\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u3001\u3053\u306e\u8a18\u4e8b\u3092\u4f55\u5ea6\u3082\u53c2\u8003\u306b\u3057\u3066\u4e0b\u3055\u3044\u306d\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
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