{"id":769,"date":"2021-09-07T19:55:39","date_gmt":"2021-09-07T11:55:39","guid":{"rendered":"http:\/\/www.wayln.com\/?p=769"},"modified":"2021-09-07T19:55:39","modified_gmt":"2021-09-07T11:55:39","slug":"%e5%93%8d%e5%ba%94%e5%bc%8f%e7%bc%96%e7%a8%8b","status":"publish","type":"post","link":"https:\/\/www.wayln.com\/?p=769","title":{"rendered":"\u54cd\u5e94\u5f0f\u7f16\u7a0b"},"content":{"rendered":"<p>\u7528\u54cd\u5e94\u5f0f\u7f16\u7a0b\uff0c\u53ef\u4ee5\u628a\u4e8b\u4ef6\u6d41\u5f53\u505a\u6570\u636e\u6d41\u6765\u5904\u7406\u3002<br \/>\n<strong>\u9ec4\u91d1\u6cd5\u5219\uff1a\u5982\u679c\u628a\u4efb\u4f55\u4e8b\u4ef6\u53c2\u6570\u4f20\u5165\u4e00\u4e2a\u4e8b\u4ef6\uff0c\u90a3\u4e48\u6452\u5f03\u5e38\u7528\u7684\u4e8b\u4ef6\u5904\u7406\u7a0b\u5e8f\uff0c\u8f6c\u800c\u4f7f\u7528System.Reactive\uff0c\u8fd9\u5c06\u7ed9\u4ee3\u7801\u5e26\u6765\u76ca\u5904\u3002<\/strong><br \/>\n<strong>System.Reactive\u66fe\u88ab\u79f0\u4f5cReactive Extentions(\u54cd\u5e94\u5f0f\u6269\u5c55)\uff0c\u957f\u57ce\u4e3aRx.\u4e5f\u5c31\u662f\u8bf4\uff0cSystem.Reactive\u3001Reactive Extentions\u548cRx\u6307\u7684\u90fd\u662f\u540c\u4e00\u79cd\u6280\u672f<\/strong><br \/>\n\u54cd\u5e94\u5f0f\u7f16\u7a0b\u57fa\u4e8e\u53ef\u89c2\u5bdf\u6d41\u7684\u6982\u5ff5\u3002\u5f53\u8ba2\u9605\u4e00\u4e2a\u53ef\u89c2\u5bdf\u6d41\u65f6\uff0c\u4fbf\u4f1a\u6536\u5230\u4efb\u610f\u6570\u91cf\u7684\u6570\u636e\u9879\uff08OnNext)\uff0c\u7136\u540e\u8fd9\u4e2a\u6d41\u53ef\u80fd\u4f1a\u4ee5\u5355\u4e2a\u9519\u8bef(OnError)\u6216\u8005&#8221;\u6d41\u7ed3\u675f&#8221;\u901a\u77e5\u7ed3\u675f\uff08OnCompleted\uff09\u3002\u6709\u4e9b\u53ef\u89c2\u5bdf\u6d41\u6c38\u8fdc\u4e0d\u4f1a\u7ed3\u675f\u3002\u5b9e\u73b0\u7684\u63a5\u53e3\u4e0e\u4e0b\u9762\u4ee3\u7801\u7c7b\u4f3c<\/p>\n<pre><code class=\"language-CSharp line-numbers\">interface IObserver&lt;in T&gt;\n{\n    void OnNext(T item);\n    void OnCompleted();\n    void OnError(Exception error);\n}\ninterface IObservable&lt;out T&gt;\n{\n    IDisposable Subscribe(IObserver&lt;T&gt; observer);\n}\n\n<\/code><\/pre>\n<p>\u5343\u4e07\u522b\u5d4c\u5165\u8fd9\u6837\u7684\u63a5\u53e3\u3002\u5fae\u8f6f\u516c\u53f8\u7684System.Reactive\u5e93\u5305\u542b\u4e86\u4f60\u9700\u8981\u7684\u4e00\u5207\u63a5\u53e3\u3002\u54cd\u5e94\u5f0f\u4ee3\u7801\u7684\u6700\u7ec8\u5f62\u5f0f\u4e0eLINQ\u975e\u5e38\u7c7b\u4f3c\uff0c\u53ef\u4ee5\u628a\u5b83\u5f53\u505aLINQ to Events\u3002System.Reactive\u5e93\u5177\u5907\u4e86LINQ\u6240\u80fd\u5b9e\u73b0\u7684\u4e00\u5207\uff0c\u53e6\u5916\uff0c\u5b83\u8fd8\u589e\u52a0\u4e86\u8bb8\u591a\u81ea\u5df1\u7684\u8fd0\u7b97\u7b26\uff0c\u7279\u522b\u662f\u5904\u7406\u65f6\u95f4\u7684\u8fd0\u7b97\u7b26\uff1a<\/p>\n<pre><code class=\"language-CSharp line-numbers\">Observable.Interval(TimeSpan.FromSeconds(1))\n    .Timestamp()\n    .Where(x=&gt;x.Value%2==0)\n    .Select(x=&gt;x.Timestamp)\n    .Subscribe(x=&gt;Trace.WriteLine(x)\uff0c\n    ex=&gt;Trace.WriteLine(ex));\n<\/code><\/pre>\n<p>\u8be5\u793a\u4f8b\u4ee3\u7801\u4ee5\u4e00\u4e2a\u8ba1\u6570\u5668\u5f00\u59cb\uff0c\u5728\u5468\u671f\u6027\u8ba1\u65f6\u5668\uff08Interval\uff09\u4e0a\u8fd0\u884c\uff0c\u5e76\u4e14\u9488\u5bf9\u6bcf\u4e2a\u5b9e\u8df5\u6dfb\u52a0\u65f6\u95f4\u6233\uff08Timestamp)\u3002\u7136\u540e\uff0c\u8fd9\u6bb5\u4ee3\u7801\u4f1a\u8fc7\u6ee4\u90e8\u5206\u4e8b\u4ef6\uff0c\u53ea\u7559\u4e0b\u90a3\u4e9b\u5076\u6570\u8ba1\u6570\u503c\u7684\u4e8b\u4ef6\uff08Where\uff09,\u63a5\u7740\u9009\u62e9\u65f6\u95f4\u6233\u7684\u503c\uff08Timestamp),\u5f53\u5f97\u5230\u6bcf\u4e00\u4e2a\u65f6\u95f4\u6233\u7ed3\u679c\u503c\u65f6\uff0c\u5c06\u5b83\u4eec\u5199\u5165\u8c03\u8bd5\u5668\uff08Subscribe\uff09\u3002<br \/>\nLINQ to Objects\u548cLINQ to Entities\u91c7\u7528\u7684\u662f\u62c9\u5f0f\u6a21\u578b\uff0cLINQ\u67e5\u8be2\u7684\u679a\u4e3e\u4f1a\u901a\u8fc7\u67e5\u8be2\u6765\u62c9\u53d6\u6570\u636e\uff1bLINQ to EVENT(System.Reactive)\u91c7\u7528\u7684\u662f\u63a8\u5f0f\u6a21\u578b\uff0c\u4e8b\u4ef6\u81ea\u884c\u4f20\u5165\u5e76\u7ecf\u7531\u67e5\u8be2\u4f20\u64ad\u3002<br \/>\n\u5bf9\u70ed\u53ef\u89c2\u5bdf\u5bf9\u8c61\u548c\u51b7\u53ef\u89c2\u5bdf\u5bf9\u8c61\u6765\u8bf4\uff0c\u8ba2\u9605\u4f1a\u6709\u4e0d\u540c\u7684\u8868\u73b0\u3002\u70ed\u53ef\u89c2\u5bdf\u5bf9\u8c61\u662f\u4e00\u79cd\u6301\u7eed\u8fd0\u884c\u7684\u4e8b\u4ef6\u6d41\uff0c\u5982\u679c\u5728\u4e8b\u4ef6\u4f20\u5165\u65f6\u6ca1\u6709\u8ba2\u9605\u8005\uff0c\u5b83\u5c31\u4f1a\u4e22\u5931\uff0c\u5982\u9f20\u6807\u79fb\u52a8\u3002\u51b7\u53ef\u89c2\u5bdf\u5bf9\u8c61\u4e2d\u5e76\u4e0d\u4f1a\u59cb\u7ec8\u6709\u4e8b\u4ef6\u4f20\u5165\uff0c\u4ed6\u4f1a\u901a\u8fc7\u542f\u52a8\u4e8b\u4ef6\u5e8f\u5217\u6765\u54cd\u5e94\u8ba2\u9605\u3002\u4ee5HTTP\u4e0b\u8f7d\u4e3a\u4f8b\uff0c\u4ed6\u5c31\u662f\u4e00\u79cd\u51b7\u53ef\u89c2\u5bdf\u5bf9\u8c61\uff0c\u8ba2\u9605\u4f1a\u5bfc\u81f4\u53d1\u9001HTTP\u8bf7\u6c42\u3002<br \/>\nSubscribe\u8fd0\u7b97\u7b26\u5e94\u5f53\u59cb\u7ec8\u5e26\u6709\u9519\u8bef\u5904\u7406\u53c2\u6570\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7528\u54cd\u5e94\u5f0f\u7f16\u7a0b\uff0c\u53ef\u4ee5\u628a\u4e8b\u4ef6\u6d41\u5f53\u505a\u6570\u636e\u6d41\u6765\u5904\u7406\u3002 \u9ec4\u91d1\u6cd5\u5219\uff1a\u5982\u679c\u628a\u4efb\u4f55\u4e8b\u4ef6\u53c2\u6570\u4f20\u5165\u4e00\u4e2a\u4e8b\u4ef6\uff0c\u90a3\u4e48\u6452\u5f03\u5e38\u7528\u7684\u4e8b\u4ef6\u5904\u7406 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,41,2],"tags":[],"class_list":["post-769","post","type-post","status-publish","format-standard","hentry","category-c","category-41","category-2"],"_links":{"self":[{"href":"https:\/\/www.wayln.com\/index.php?rest_route=\/wp\/v2\/posts\/769","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wayln.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wayln.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wayln.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wayln.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=769"}],"version-history":[{"count":1,"href":"https:\/\/www.wayln.com\/index.php?rest_route=\/wp\/v2\/posts\/769\/revisions"}],"predecessor-version":[{"id":770,"href":"https:\/\/www.wayln.com\/index.php?rest_route=\/wp\/v2\/posts\/769\/revisions\/770"}],"wp:attachment":[{"href":"https:\/\/www.wayln.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=769"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wayln.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=769"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wayln.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=769"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}