{"id":1899,"date":"2019-10-09T21:22:56","date_gmt":"2019-10-09T12:22:56","guid":{"rendered":"http:\/\/idealive.jp\/blog\/?p=1899"},"modified":"2019-10-09T21:22:56","modified_gmt":"2019-10-09T12:22:56","slug":"linq","status":"publish","type":"post","link":"https:\/\/idealive.jp\/blog\/2019\/10\/09\/linq\/","title":{"rendered":"LINQ"},"content":{"rendered":"<p>\u3069\u3046\u3082\u3053\u3093\u306b\u3061\u306f\u3002<\/p>\n<p>\u6700\u8fd1\u3001C#\u3092\u5c11\u3005\u304b\u3058\u308a\u307e\u3057\u3066\u3002<br \/>\n\u305d\u306e\u6642\u306b\u51fa\u3066\u304d\u305fLINQ\u306b\u3064\u3044\u3066\u306e\u304a\u8a71\u3067\u3059\u3002<\/p>\n<hr \/>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_83 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u76ee\u6b21<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-5'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/idealive.jp\/blog\/2019\/10\/09\/linq\/#LINQ%E3%81%A8%E3%81%AF%EF%BC%9F\" >LINQ\u3068\u306f\uff1f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-5'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/idealive.jp\/blog\/2019\/10\/09\/linq\/#%E3%81%A9%E3%82%93%E3%81%AA%E3%82%82%E3%81%AE%EF%BC%9F\" >\u3069\u3093\u306a\u3082\u306e\uff1f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-5'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/idealive.jp\/blog\/2019\/10\/09\/linq\/#%E4%BD%BF%E3%81%A3%E3%81%A6%E3%81%BF%E3%81%A6%EF%BC%9F\" >\u4f7f\u3063\u3066\u307f\u3066\uff1f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-5'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/idealive.jp\/blog\/2019\/10\/09\/linq\/#%E6%9C%80%E5%BE%8C%E3%81%AB\" >\u6700\u5f8c\u306b<\/a><\/li><\/ul><\/nav><\/div>\n<h5><span class=\"ez-toc-section\" id=\"LINQ%E3%81%A8%E3%81%AF%EF%BC%9F\"><\/span>LINQ\u3068\u306f\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h5>\n<p>\u7d71\u5408\u8a00\u8a9e\u30af\u30a8\u30ea\uff08<b>L<\/b>anguage <b>IN<\/b>tegrated <b>Q<\/b>uery\uff09\u3068\u3044\u3046\u3082\u306e\u3060\u305d\u3046\u3067\u3059\u3002<br \/>\n\u8aad\u307f\u65b9\u306f\u300c<strong>\u30ea\u30f3\u30af<\/strong>\u300d\u3068\u306e\u3053\u3068\u3002<\/p>\n<p>\u8a73\u3057\u304f\u306f\u3001\u3053\u3061\u3089\u304b\u3089\u3069\u3046\u305e\u3002\u21d2 <a href=\"https:\/\/ja.wikipedia.org\/wiki\/%E7%B5%B1%E5%90%88%E8%A8%80%E8%AA%9E%E3%82%AF%E3%82%A8%E3%83%AA\" target=\"_blank\" rel=\"noopener\">\u7d71\u5408\u8a00\u8a9e\u30af\u30a8\u30ea<\/a><\/p>\n<p>\u307e\u305f\u306f\u3001\u3053\u3061\u3089 \u21d2 <a href=\"https:\/\/docs.microsoft.com\/ja-jp\/dotnet\/csharp\/linq\/\" target=\"_blank\" rel=\"noopener\">C# \u306e\u7d71\u5408\u8a00\u8a9e\u30af\u30a8\u30ea (LINQ)<\/a><\/p>\n<hr \/>\n<h5><span class=\"ez-toc-section\" id=\"%E3%81%A9%E3%82%93%E3%81%AA%E3%82%82%E3%81%AE%EF%BC%9F\"><\/span>\u3069\u3093\u306a\u3082\u306e\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h5>\n<p>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u304b\u3001\u914d\u5217\u3068\u304b\u306e\u30c7\u30fc\u30bf\u30bd\u30fc\u30b9\u3092\u64cd\u4f5c\u3059\u308b\u305f\u3081\u306b\u898f\u683c\u5316\u3055\u308c\u305f\u3082\u306e\u3001<br \/>\n\u3068\u3044\u3046\u8a8d\u8b58\u3067\u3059\u3002<br \/>\n\u203b\u9593\u9055\u3044\u304c\u3042\u308c\u3070\u3054\u6307\u6458\u3092\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001\u3053\u3093\u306a\u914d\u5217\u304c\u3042\u3063\u305f\u3068\u3057\u307e\u3057\u3087\u3046\u3002<br \/>\n\u3042\u3001\u4eca\u56de\u306f\u3042\u304f\u307e\u3067C#\u3067\u884c\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">var children = new [] \r\n{\r\n\tnew {name=\"\u9234\u6728\u3000\u305f\u308d\u3046\", age=10, blood=\"A\"},\r\n\tnew {name=\"\u4f50\u85e4\u3000\u3072\u308d\u3057\", age=9, blood=\"B\"},\r\n\tnew {name=\"\u9ad8\u6a4b\u3000\u306f\u306a\u3053\", age=11, blood=\"O\"},\r\n\tnew {name=\"\u7530\u4e2d\u3000\u3088\u3057\u3053\", age=8, blood=\"AB\"},\r\n};\r\n<\/pre>\n<p>\u3053\u3053\u304b\u3089\u3001age\u304c10\u4ee5\u4e0a\u306e\u5b50\u4f9b\u306e\u540d\u524d\u3092\u62bd\u51fa\u3057\u3066\u51fa\u529b\u3001<br \/>\n\u3068\u3044\u3046\u306e\u3092LINQ\u3067\u8a18\u8ff0\u3059\u308b\u3068\u3001\u3053\u3046\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true \">var list = from c in children\r\n           where age &gt;= 10\r\n           select c.name;\r\n\r\nforeach (var child in list)\r\n{\r\n    Console.WriteLine(child);\r\n}<\/pre>\n<p>\u3053\u3093\u306a\u611f\u3058\u3067\u3059\u3002<\/p>\n<p>\u306a\u3093\u304b\u3001SQL\u306b\u4f3c\u3066\u307e\u3059\u304c\u3001\u3053\u308c\u306fLINQ\u306e<strong>\u30af\u30a8\u30ea\u69cb\u6587<\/strong>\u3068\u547c\u3070\u308c\u308b\u3082\u306e\u3067\u3001<br \/>\n\u4ed6\u306b<strong>\u30e1\u30bd\u30c3\u30c9\u69cb\u6587<\/strong>\u3082\u3042\u308a\u3001\u540c\u3058\u3053\u3068\u3092\u30e1\u30bd\u30c3\u30c9\u69cb\u6587\u3067\u8a18\u8ff0\u3059\u308b\u3068<\/p>\n<pre class=\"lang:default decode:true \">var list = children.Where(c =&gt; c.age &gt;= 10)\r\n                   .Select(c =&gt; c.name);\r\n\r\nforeach (var child in list)\r\n{\r\n    Console.WriteLine(child);\r\n}<\/pre>\n<p>\u3053\u3046\u306a\u308a\u307e\u3059\u3002<br \/>\n&nbsp;<\/p>\n<p>\u4eca\u56de\u306e\u4f8b\u3067\u306f\u3001\u3068\u3066\u3082\u30b7\u30f3\u30d7\u30eb\u306a\u3082\u306e\u306b\u3057\u307e\u3057\u305f\u304c\u3001\u305d\u306e\u307b\u304b<br \/>\nOrderBy\u3084\u96c6\u8a08\u3001\u5225\u306e\u30c7\u30fc\u30bf\u30bd\u30fc\u30b9\u3068\u7d50\u5408\u3057\u305f\u308a\u3067\u304d\u307e\u3059\u3002<\/p>\n<hr \/>\n<h5><span class=\"ez-toc-section\" id=\"%E4%BD%BF%E3%81%A3%E3%81%A6%E3%81%BF%E3%81%A6%EF%BC%9F\"><\/span>\u4f7f\u3063\u3066\u307f\u3066\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h5>\n<p>\u30af\u30a8\u30ea\u69cb\u6587\u306f\u3001SQL\u306b\u4f3c\u3066\u3057\u307e\u3063\u3066\u308b\u304c\u3086\u3048\u306b\u3061\u3087\u3063\u3068\u3068\u3063\u3064\u304d\u306b\u304f\u304b\u3063\u305f\u3067\u3059\u3002<br \/>\n\u30e1\u30bd\u30c3\u30c9\u69cb\u6587\u306f\u3001\u3044\u308f\u3086\u308bOR\u30de\u30c3\u30d1\u30fc\u306e\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u3063\u307d\u3044\u304b\u306a\u30fc\uff1f<br \/>\n\u3068\u601d\u3063\u3066\u3044\u305f\u306e\u3067\u3059\u304c\u3001<br \/>\n\u6163\u308c\u3066\u304f\u308b\u3068\u30af\u30a8\u30ea\u69cb\u6587\u306e\u65b9\u304c\u53ef\u8aad\u6027\u304c\u4e0a\u304c\u308b\u306a\u3001\u3068\u3044\u3046\u611f\u3058\u3067\u3059\u3002<\/p>\n<hr \/>\n<h5><span class=\"ez-toc-section\" id=\"%E6%9C%80%E5%BE%8C%E3%81%AB\"><\/span>\u6700\u5f8c\u306b<span class=\"ez-toc-section-end\"><\/span><\/h5>\n<p>\u4eca\u56de\u306f\u307b\u3093\u306e\u3055\u308f\u308a\u3060\u3051\u3067\u3057\u305f\u3002<br \/>\n\u3082\u3063\u3068\u8a73\u3057\u3044\u3053\u3068\u306f\u5f53\u7136\u306e\u3088\u3046\u306b\u5148\u4eba\u305f\u3061\u304c\u884c\u304d\u7740\u3044\u3066\u3044\u308b\u306e\u3067\u3001<br \/>\n\u307e\u305a\u306f\u3044\u308d\u3093\u306a\u65b9\u306e\u3068\u3063\u304b\u304b\u308a\u306b\u306a\u308c\u3070\u3088\u3044\u306a\u3001\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<p>\u73fe\u5728\u3001\u3055\u307e\u3056\u307e\u306a\u8a00\u8a9e\u3067LINQ\u306e\u5b9f\u88c5\u304c\u3055\u308c\u3066\u3044\u308b\u3088\u3046\u306a\u306e\u3067<br \/>\n\u305d\u3061\u3089\u3082\u3042\u308f\u305b\u3066\u3069\u3046\u305e\u3002<\/p>\n<p>r.tanaka\u304c\u304a\u5c4a\u3051\u3057\u307e\u3057\u305f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u3069\u3046\u3082\u3053\u3093\u306b\u3061\u306f\u3002 \u6700\u8fd1\u3001C#\u3092\u5c11\u3005\u304b\u3058\u308a\u307e\u3057\u3066\u3002 \u305d\u306e\u6642\u306b\u51fa\u3066\u304d\u305fLINQ\u306b\u3064\u3044\u3066\u306e\u304a\u8a71\u3067\u3059\u3002 LINQ\u3068\u306f\uff1f \u7d71\u5408\u8a00\u8a9e\u30af\u30a8\u30ea\uff08Language INtegrated Query\uff09\u3068\u3044\u3046\u3082\u306e\u3060\u305d\u3046\u3067\u3059\u3002 \u8aad\u307f\u65b9\u306f\u300c\u30ea\u30f3&#8230;<a class=\"read-more-link button\" href=\"https:\/\/idealive.jp\/blog\/2019\/10\/09\/linq\/\">\u7d9a\u304d\u3092\u8aad\u3080<\/a><\/p>\n","protected":false},"author":4,"featured_media":1904,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[28,1],"tags":[],"class_list":["post-1899","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-c-sharp","category-1"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/idealive.jp\/blog\/wp-json\/wp\/v2\/posts\/1899"}],"collection":[{"href":"https:\/\/idealive.jp\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idealive.jp\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idealive.jp\/blog\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/idealive.jp\/blog\/wp-json\/wp\/v2\/comments?post=1899"}],"version-history":[{"count":3,"href":"https:\/\/idealive.jp\/blog\/wp-json\/wp\/v2\/posts\/1899\/revisions"}],"predecessor-version":[{"id":1902,"href":"https:\/\/idealive.jp\/blog\/wp-json\/wp\/v2\/posts\/1899\/revisions\/1902"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/idealive.jp\/blog\/wp-json\/wp\/v2\/media\/1904"}],"wp:attachment":[{"href":"https:\/\/idealive.jp\/blog\/wp-json\/wp\/v2\/media?parent=1899"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idealive.jp\/blog\/wp-json\/wp\/v2\/categories?post=1899"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idealive.jp\/blog\/wp-json\/wp\/v2\/tags?post=1899"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}