{"id":7010,"date":"2023-08-06T09:18:47","date_gmt":"2023-08-06T01:18:47","guid":{"rendered":"https:\/\/i007.vip:15443\/wordpress\/?p=7010"},"modified":"2023-08-06T09:18:47","modified_gmt":"2023-08-06T01:18:47","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8c%e4%b8%ad%e4%bd%bf%e7%94%a8-cancellationtoken-%e5%a4%84%e7%90%86%e5%bc%82%e6%ad%a5%e4%bb%bb%e5%8a%a1","status":"publish","type":"post","link":"https:\/\/i007.cc\/wordpress\/archives\/7010","title":{"rendered":"\u5982\u4f55\u5728C#\u4e2d\u4f7f\u7528 CancellationToken \u5904\u7406\u5f02\u6b65\u4efb\u52a1"},"content":{"rendered":"<div class=\"article-header-box\">\n<div class=\"article-header\">\n<div class=\"article-title-box\"><\/div>\n<\/div>\n<\/div>\n<article class=\"baidu_pl\">\n<div id=\"article_content\" class=\"article_content clearfix\">\n<div id=\"content_views\" class=\"htmledit_views\">\n<p><a href=\"https:\/\/blog.csdn.net\/chinaherolts2008\/article\/details\/122611446\">cc from<\/a><\/p>\n<p>\u8fd9\u7bc7\u6587\u7ae0\u4e3b\u8981\u4ecb\u7ecd\u4e86\u5982\u4f55\u5728C#\u4e2d\u4f7f\u7528 CancellationToken \u5904\u7406\u5f02\u6b65\u4efb\u52a1\uff0c\u5e2e\u52a9\u5927\u5bb6\u66f4\u597d\u7684\u7406\u89e3\u548c\u5b66\u4e60\u4f7f\u7528c#\uff0c\u611f\u5174\u8da3\u7684\u670b\u53cb\u53ef\u4ee5\u4e86\u89e3\u4e0b<\/p>\n<p>&nbsp;<\/p>\n<p>\u76ee\u5f55<\/p>\n<ul>\n<li><a title=\"\u624b\u52a8\u53d6\u6d88\u4efb\u52a1\" href=\"https:\/\/www.jb51.net\/article\/207733.htm#_label0\" target=\"_blank\" rel=\"noopener\">\u624b\u52a8\u53d6\u6d88\u4efb\u52a1<\/a><\/li>\n<li><a title=\"\u5b9a\u65f6\u53d6\u6d88\u4efb\u52a1\" href=\"https:\/\/www.jb51.net\/article\/207733.htm#_label1\" target=\"_blank\" rel=\"noopener\">\u5b9a\u65f6\u53d6\u6d88\u4efb\u52a1<\/a><\/li>\n<li><a title=\"CancellationToken \u6ce8\u518c\u56de\u8c03\" href=\"https:\/\/www.jb51.net\/article\/207733.htm#_label2\" target=\"_blank\" rel=\"noopener\">CancellationToken \u6ce8\u518c\u56de\u8c03<\/a><\/li>\n<li><a title=\"\u5728 HttpClient \u4e2d\u4f7f\u7528\" href=\"https:\/\/www.jb51.net\/article\/207733.htm#_label3\" target=\"_blank\" rel=\"noopener\">\u5728 HttpClient \u4e2d\u4f7f\u7528<\/a><\/li>\n<li><a title=\"\u5728 WebAPI\u4e2d\u4f7f\u7528\" href=\"https:\/\/www.jb51.net\/article\/207733.htm#_label4\" target=\"_blank\" rel=\"noopener\">\u5728 WebAPI\u4e2d\u4f7f\u7528<\/a><\/li>\n<\/ul>\n<p>\u5728 .NET Core \u4e2d\u4f7f\u7528<a class=\"hl hl-1\" href=\"https:\/\/so.csdn.net\/so\/search?q=%E5%BC%82%E6%AD%A5%E7%BC%96%E7%A8%8B&amp;spm=1001.2101.3001.7020\" target=\"_blank\" rel=\"noopener\" data-report-click=\"{&quot;spm&quot;:&quot;1001.2101.3001.7020&quot;,&quot;dest&quot;:&quot;https:\/\/so.csdn.net\/so\/search?q=%E5%BC%82%E6%AD%A5%E7%BC%96%E7%A8%8B&amp;spm=1001.2101.3001.7020&quot;,&quot;extra&quot;:&quot;{\\&quot;searchword\\&quot;:\\&quot;\u5f02\u6b65\u7f16\u7a0b\\&quot;}&quot;}\" data-tit=\"\u5f02\u6b65\u7f16\u7a0b\" data-pretit=\"\u5f02\u6b65\u7f16\u7a0b\">\u5f02\u6b65\u7f16\u7a0b<\/a>\u5df2\u7ecf\u5f88\u666e\u904d\u4e86\uff0c \u4f60\u5728\u9879\u76ee\u4e2d\u968f\u5904\u53ef\u89c1 async \u548c await\uff0c\u5b83\u7b80\u5316\u4e86\u5f02\u6b65\u64cd\u4f5c\uff0c\u5141\u8bb8\u5f00\u53d1\u4eba\u5458\uff0c\u4f7f\u7528\u540c\u6b65\u7684\u65b9\u5f0f\u7f16\u5199\u5f02\u6b65\u4ee3\u7801\uff0c\u4f60\u4f1a\u53d1\u73b0\u5728\u5927\u90e8\u5206\u7684\u5f02\u6b65\u65b9\u6cd5\u4e2d\uff0c\u90fd\u63d0\u4f9b\u4e86CancellationToken\u53c2\u6570\uff0c\u672c\u6587\u4e3b\u8981\u4ecb\u7ecd\u4e0b CancellationTokenSource \u548c CancellationToken\u5728\u5f02\u6b65\u4efb\u52a1\u4e2d\u7684\u4f7f\u7528\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2><a name=\"t0\"><\/a>\u624b\u52a8\u53d6\u6d88\u4efb\u52a1<\/h2>\n<p>\u521b\u5efa\u4e00\u4e2a CancellationTokenSource\uff0c\u7136\u540e\u8c03\u7528\u5f02\u6b65\u65b9\u6cd5\u65f6\uff0c\u4f20\u5165 CancellationToken\uff0c\u5b83\u662f\u4e00\u4e2a\u8f7b\u91cf\u7ea7\u5bf9\u8c61\uff0c\u53ef\u4ee5\u901a\u77e5\u8bf7\u6c42\u662f\u5426\u5df2\u53d6\u6d88\uff0c\u6211\u4eec\u53ef\u4ee5\u624b\u52a8\u8c03\u7528\u00a0<a class=\"hl hl-1\" href=\"https:\/\/so.csdn.net\/so\/search?q=cts&amp;spm=1001.2101.3001.7020\" target=\"_blank\" rel=\"noopener\" data-report-click=\"{&quot;spm&quot;:&quot;1001.2101.3001.7020&quot;,&quot;dest&quot;:&quot;https:\/\/so.csdn.net\/so\/search?q=cts&amp;spm=1001.2101.3001.7020&quot;,&quot;extra&quot;:&quot;{\\&quot;searchword\\&quot;:\\&quot;cts\\&quot;}&quot;}\" data-tit=\"cts\" data-pretit=\"cts\">cts<\/a>.Cancel() \u6765\u53d6\u6d88\u4efb\u52a1\uff0c\u4e3a\u4e86\u65b9\u9762\u6f14\u793a\uff0c\u8fd9\u91cc\u6211\u6709\u7528\u5230\u5c40\u90e8\u65b9\u6cd5\u3002<\/p>\n<div class=\"table-box\">\n<table border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>1<\/p>\n<p>2<\/p>\n<p>3<\/p>\n<p>4<\/p>\n<p>5<\/p>\n<p>6<\/p>\n<p>7<\/p>\n<p>8<\/p>\n<p>9<\/p>\n<p>10<\/p>\n<p>11<\/p>\n<p>12<\/p>\n<p>13<\/p>\n<p>14<\/p>\n<p>15<\/p>\n<p>16<\/p>\n<p>17<\/td>\n<td><code>static<\/code>\u00a0<code>async Task Main(<\/code><code>string<\/code><code>[] args)<\/code><\/p>\n<p><code>{<\/code><\/p>\n<p><code>\u00a0\u00a0<\/code><code>async Task Execute(CancellationToken token)<\/code><\/p>\n<p><code>\u00a0\u00a0<\/code><code>{<\/code><\/p>\n<p><code>\u00a0\u00a0<\/code><code>await Task.Delay(3000, token);<\/code><\/p>\n<p><code>\u00a0\u00a0<\/code><code>Console.WriteLine(<\/code><code>\"Executed\"<\/code><code>);<\/code><\/p>\n<p><code>\u00a0\u00a0<\/code><code>}<\/code><\/p>\n<p>&nbsp;<\/p>\n<p><code>\u00a0\u00a0<\/code><code>CancellationTokenSource cts =\u00a0<\/code><code>new<\/code>\u00a0<code>CancellationTokenSource();<\/code><\/p>\n<p>&nbsp;<\/p>\n<p><code>\u00a0\u00a0<\/code><code>_ = Execute(cts.Token);<\/code><\/p>\n<p>&nbsp;<\/p>\n<p><code>\u00a0\u00a0<\/code><code>\/\/ \u624b\u52a8\u53d6\u6d88\u4efb\u52a1<\/code><\/p>\n<p><code>\u00a0\u00a0<\/code><code>cts.Cancel();<\/code><\/p>\n<p>&nbsp;<\/p>\n<p><code>\u00a0\u00a0<\/code><code>Console.ReadKey();<\/code><\/p>\n<p><code>}\u00a0<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>&nbsp;<\/p>\n<h2><a name=\"t1\"><\/a>\u5b9a\u65f6\u53d6\u6d88\u4efb\u52a1<\/h2>\n<p>\u521b\u5efa CancellationTokenSource \u7684\u65f6\u5019\uff0c\u53ef\u4ee5\u4f20\u5165\u65f6\u95f4\uff08\u6beb\u79d2\u6216\u8005Timespan), \u901a\u8fc7\u5b83\u6211\u4eec\u53ef\u4ee5\u5728\u7b49\u5f85\u4e00\u6bb5\u65f6\u95f4\u540e\uff0c\u81ea\u52a8\u53d6\u6d88\u4efb\u52a1\u3002<\/p>\n<div class=\"table-box\">\n<table border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>1<\/p>\n<p>2<\/p>\n<p>3<\/p>\n<p>4<\/p>\n<p>5<\/td>\n<td><code>CancellationTokenSource cts =\u00a0<\/code><code>new<\/code>\u00a0<code>CancellationTokenSource(1000);<\/code><\/p>\n<p>&nbsp;<\/p>\n<p><code>_ = Execute(cts.Token);<\/code><\/p>\n<p>&nbsp;<\/p>\n<p><code>Console.ReadKey();<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\u6211\u4eec\u4e5f\u53ef\u4ee5\u8c03\u7528 cts.CancelAfter(1000), \u5b83\u4f1a\u57281s\u540e\u53d6\u6d88\u4efb\u52a1\u3002<\/p>\n<p>cts.CancelAfter(1000);<\/p>\n<p>&nbsp;<\/p>\n<h2><a name=\"t2\"><\/a>CancellationToken \u6ce8\u518c\u56de\u8c03<\/h2>\n<p>\u6211\u4eec\u53ef\u4ee5\u8c03\u7528 Register()\u65b9\u6cd5\uff0c\u6ce8\u518cToken\u53d6\u6d88\u7684\u56de\u8c03\uff0c\u53c2\u6570\u9700\u8981\u4f20\u5165 Action \u59d4\u6258\u3002<\/p>\n<div class=\"table-box\">\n<table border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>1<\/p>\n<p>2<\/p>\n<p>3<\/p>\n<p>4<\/p>\n<p>5<\/p>\n<p>6<\/p>\n<p>7<\/p>\n<p>8<\/td>\n<td><code>CancellationTokenSource cts =\u00a0<\/code><code>new<\/code>\u00a0<code>CancellationTokenSource(1000);<\/code><\/p>\n<p>&nbsp;<\/p>\n<p><code>cts.Token.Register(() =&gt; Console.WriteLine(<\/code><code>\"\u4efb\u52a1\u5df2\u53d6\u6d88!\"<\/code><code>));<\/code><\/p>\n<p>&nbsp;<\/p>\n<p><code>\/\/ \u5f00\u59cb\u5f02\u6b65\u4efb\u52a1<\/code><\/p>\n<p><code>_ = Execute(cts.Token);\u00a0<\/code><\/p>\n<p>&nbsp;<\/p>\n<p><code>Console.ReadKey();<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>Register() \u6ce8\u518c\u56de\u8c03\u540e\uff0c\u8fd4\u56de\u4e00\u4e2a CancellationTokenRegistration \u5bf9\u8c61\uff0c\u540c\u6837\u7684\uff0c\u4f60\u53ef\u4ee5\u5728\u56de\u8c03\u51fd\u6570\u6267\u884c\u524d\uff0c\u79fb\u9664\u6ce8\u518c\u56de\u8c03\uff0c\u5c31\u50cf\u8fd9\u6837\uff1a<\/p>\n<div class=\"table-box\">\n<table border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>1<\/td>\n<td><code>cts.Token.Register(() =&gt; Console.WriteLine(<\/code><code>\"\u4efb\u52a1\u5df2\u53d6\u6d88!\"<\/code><code>)).Unregister();<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>&nbsp;<\/p>\n<h2><a name=\"t3\"><\/a>\u5728 HttpClient \u4e2d\u4f7f\u7528<\/h2>\n<p>\u540c\u6837\uff0c\u4f60\u53ef\u4ee5\u5728 HttpClient \u4e2d\u4f7f\u7528\u4f20\u5165 CancellationToken \uff08\u6216\u8005\u4f7f\u7528HttpClient\u7684Timeout\u5c5e\u6027\uff09\uff0c\u8d85\u65f6\u540e\uff0c\u5b83\u4f1a\u629b\u51fa\u4e00\u4e2a TaskCanceledException \u7684\u5f02\u5e38\uff1a<\/p>\n<div class=\"table-box\">\n<table border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>1<\/p>\n<p>2<\/p>\n<p>3<\/p>\n<p>4<\/p>\n<p>5<\/td>\n<td><code>CancellationTokenSource cts =\u00a0<\/code><code>new<\/code>\u00a0<code>CancellationTokenSource(10);<\/code><\/p>\n<p>&nbsp;<\/p>\n<p><code>_ = await\u00a0<\/code><code>new<\/code>\u00a0<code>HttpClient().GetAsync(<\/code><code>\"<\/code><a title=\"https:\/\/www.youtube.com\/\" href=\"https:\/\/www.youtube.com\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.youtube.com\/<\/a><code>\"<\/code><code>,cts.Token);<\/code><\/p>\n<p>&nbsp;<\/p>\n<p><code>Console.ReadKey();<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>&nbsp;<\/p>\n<h2><a name=\"t4\"><\/a>\u5728 WebAPI\u4e2d\u4f7f\u7528<\/h2>\n<p>\u6211\u521b\u5efa\u4e86\u4e00\u4e2a WebAPI \u9879\u76ee\uff0c\u5176\u4e2d\u7684\u63a7\u5236\u5668\u4ee3\u7801\u5982\u4e0b\uff0c\u7b49\u5f85\u4e865s\uff0c\u7136\u540e\u8fdb\u884c\u8f93\u51fa\u4fe1\u606f\u3002<\/p>\n<div class=\"table-box\">\n<table border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>1<\/p>\n<p>2<\/p>\n<p>3<\/p>\n<p>4<\/p>\n<p>5<\/p>\n<p>6<\/p>\n<p>7<\/td>\n<td><code>[HttpGet]<\/code><\/p>\n<p><code>public<\/code>\u00a0<code>async Task&lt;IActionResult&gt; Index()<\/code><\/p>\n<p><code>{<\/code><\/p>\n<p><code>\u00a0<\/code><code>await Task.Delay(5000);<\/code><\/p>\n<p><code>\u00a0<\/code><code>Console.WriteLine(<\/code><code>\"Executed\"<\/code><code>);<\/code><\/p>\n<p><code>\u00a0<\/code><code>return<\/code>\u00a0<code>Ok();<\/code><\/p>\n<p><code>}<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\u542f\u52a8\u9879\u76ee\u540e\uff0c\u6211\u4eec\u5728\u6d4f\u89c8\u5668\u9875\u9762\u4e0a\u8bbf\u95ee\u63a5\u53e3\uff0c\u5728\u7b2c\u4e00\u6b21\u8bbf\u95ee\u63a5\u53e3\u7b49\u5f85\u54cd\u5e94\u65f6\uff0c\u6211\u5237\u65b0\u4e00\u6b21\u4e86\u9875\u9762\uff0c\u73b0\u5728\u7a0b\u5e8f\u7684\u8f93\u51fa\u4fe1\u606f\u5982\u4e0b\uff1a<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/img-blog.csdnimg.cn\/img_convert\/2225621cf3529db09698fff7da8d328e.png\" alt=\"\" \/><\/p>\n<p>\u200b<\/p>\n<p>\u8bf4\u660e\u524d\u53f0\u9875\u9762\u5237\u65b0\u540e\uff0c\u540e\u53f0\u5e76\u6ca1\u6709\u505a\u53d6\u6d88\u64cd\u4f5c\uff0c\u6267\u884c\u4e86\u4e24\u6b21\uff01<\/p>\n<p>\u6211\u4eec\u53ef\u4ee5\u628a\u7a0b\u5e8f\u6539\u6210\u8fd9\u6837\uff0c\u4f20\u5165 CancellationToken<\/p>\n<div class=\"table-box\">\n<table border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>1<\/p>\n<p>2<\/p>\n<p>3<\/p>\n<p>4<\/p>\n<p>5<\/p>\n<p>6<\/p>\n<p>7<\/td>\n<td><code>[HttpGet]<\/code><\/p>\n<p><code>public<\/code>\u00a0<code>async Task&lt;IActionResult&gt; Index(CancellationToken token)<\/code><\/p>\n<p><code>{<\/code><\/p>\n<p><code>\u00a0<\/code><code>await Task.Delay(5000,token);<\/code><\/p>\n<p><code>\u00a0<\/code><code>Console.WriteLine(<\/code><code>\"Executed\"<\/code><code>);<\/code><\/p>\n<p><code>\u00a0<\/code><code>return<\/code>\u00a0<code>Ok();<\/code><\/p>\n<p><code>}<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\u73b0\u5728\u5728\u6d4f\u89c8\u5668\u8bbf\u95ee\u9875\u9762\uff0c\u540c\u6837\u7684\uff0c\u7b2c\u4e00\u6b21\u8fd8\u672a\u8fd4\u56de\u662f\uff0c\u6211\u4eec\u5237\u65b0\u4e00\u6b21\u9875\u9762\uff0c\u7a0b\u5e8f\u8f93\u51fa\u5982\u4e0b\uff1a<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/img-blog.csdnimg.cn\/img_convert\/d348263c4d767b397ad439baf964b4d7.png\" alt=\"\" \/><\/p>\n<p>\u200b<\/p>\n<p>\u53ea\u6709\u4e00\u6b21\u8f93\u51fa\uff0c\u7b2c\u4e00\u6b21\u8bf7\u6c42\u629b\u51fa\u4e86\u4e00\u6b21 TaskCanceledException \u5f02\u5e38\uff0c\u6ca1\u6709\u7ee7\u7eed\u6267\u884c\u540e\u8fb9\u7684\u903b\u8f91\uff0c\u5f53\u7136\u4f60\u53ef\u4ee5\u6355\u83b7\u8fd9\u4e2a\u5f02\u5e38\uff0c\u8fd4\u56de\u66f4\u53cb\u597d\u7684\u63d0\u793a\uff01<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u5982\u4f55\u5728C#\u4e2d\u4f7f\u7528 CancellationToken \u5904\u7406\u5f02\u6b65\u4efb\u52a1\u7684\u8be6\u7ec6\u5185\u5bb9<\/p>\n<p>&nbsp;<\/p>\n<p>\u200b<\/p>\n<\/div>\n<\/div>\n<\/article>\n","protected":false},"excerpt":{"rendered":"<p>cc from \u8fd9\u7bc7\u6587\u7ae0\u4e3b\u8981\u4ecb\u7ecd\u4e86\u5982\u4f55\u5728<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","footnotes":""},"categories":[24],"tags":[121],"class_list":["post-7010","post","type-post","status-publish","format-standard","hentry","category-value_docs","tag-05-"],"_links":{"self":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/7010","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/comments?post=7010"}],"version-history":[{"count":0,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/7010\/revisions"}],"wp:attachment":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/media?parent=7010"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/categories?post=7010"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/tags?post=7010"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}