{"id":855,"date":"2021-09-13T16:44:00","date_gmt":"2021-09-13T08:44:00","guid":{"rendered":"http:\/\/www.wayln.com\/?p=855"},"modified":"2021-09-13T16:44:00","modified_gmt":"2021-09-13T08:44:00","slug":"%e6%95%b0%e6%8d%ae%e6%b5%81%e5%9f%ba%e7%a1%80-%e4%bc%a0%e6%92%ad%e9%94%99%e8%af%af","status":"publish","type":"post","link":"https:\/\/www.wayln.com\/?p=855","title":{"rendered":"\u6570\u636e\u6d41\u57fa\u7840\u2014\u2014\u4f20\u64ad\u9519\u8bef"},"content":{"rendered":"<div id=\"toc_container\" class=\"toc_transparent no_bullets\"><p class=\"toc_title\">Contents<\/p><ul class=\"toc_list\"><li><a href=\"#i\"><span class=\"toc_number toc_depth_1\">1<\/span> \u95ee\u9898<\/a><\/li><li><a href=\"#i-2\"><span class=\"toc_number toc_depth_1\">2<\/span> \u89e3\u51b3\u65b9\u6848<\/a><\/li><li><a href=\"#i-3\"><span class=\"toc_number toc_depth_1\">3<\/span> \u8ba8\u8bba<\/a><\/li><\/ul><\/div>\n<h1><span id=\"i\">\u95ee\u9898<\/span><\/h1>\n<p>\u5047\u8bbe\u9700\u8981\u5bf9\u6570\u636e\u6d41\u7f51\u683c\u4e2d\u53ef\u80fd\u51fa\u73b0\u7684\u9519\u8bef\u505a\u51fa\u54cd\u5e94<\/p>\n<h1><span id=\"i-2\">\u89e3\u51b3\u65b9\u6848<\/span><\/h1>\n<p>\u5982\u679c\u4f20\u9012\u81f3\u6570\u636e\u6d41\u5757\u7684\u59d4\u6258\u629b\u51fa\u5f02\u5e38\uff0c\u5219\u8be5\u5feb\u4f1a\u8fdb\u5165\u9519\u8bef\u72b6\u6001\uff0c\u5904\u4e8e\u9519\u8bef\u72b6\u6001\u7684\u5757\u4f1a\u4e22\u5f03\u5176\u5168\u90e8\u6570\u636e\u5e76\u505c\u6b62\u63a5\u6536\u65b0\u6570\u636e\u3002\u4e00\u4e0b\u4ee3\u7801\u4e2d\u7684\u5757\u6c38\u8fdc\u4e0d\u4f1a\u751f\u6210\u4efb\u4f55\u8f93\u51fa\u6570\u636e\uff0c\u7b2c\u4e00\u4e2a\u503c\u4f1a\u629b\u51fa\u5f02\u5e38\uff0c\u800c\u7b2c\u4e8c\u4e2a\u503c\u4f1a\u88ab\u4e22\u5f03\uff1a<\/p>\n<pre><code class=\"language-CSharp line-numbers\">var block=new TransformBlock&lt;int,int&gt;(item=&gt;\n{\nif(item==1)\n{\nthrow new InvalidOperationException(\"Blech.\");\n}\nreturn item*2;\n});\nblock.Post(1);\nblock.Post(2);\n<\/code><\/pre>\n<p>\u82e5\u8981\u4ece\u6570\u636e\u6d41\u5757\u4e2d\u6355\u83b7\u5f02\u5e38\uff0c\u5e94\u5f53\u9488\u5bf9\u5b83\u7684Completion\u5c5e\u6027\u5e94\u7528await\u3002\u5f53\u5757\u5b8c\u6210\u65f6\uff0cCompletion\u5c5e\u6027\u8fd4\u56de\u7684Task\u4e5f\u4f1a\u5b8c\u6210\u3002\u5982\u679c\u5757\u51fa\u9519\uff0c\u90a3\u4e48Completion\u4efb\u52a1\u4e5f\u4f1a\u51fa\u9519\uff1a<\/p>\n<pre><code class=\"language-CSharp line-numbers\">try\n{\n    var block=new TransformBlock&lt;int,int&gt;(item=&gt;\n    {\n        if(item==1)\n            throw new InvalidOperationException(\"Blech.\");\n        return item*2;\n    });\n    block.Post(1);\n    await block.Completion;\n}\ncatch(InvalidOperationException)\n{\n    \/\/\u6355\u83b7\u5f02\u5e38\n}\n<\/code><\/pre>\n<p>\u5728\u4f7f\u7528PropagateCompletion\u9009\u9879\u4f20\u64ad\u5b8c\u6210\u72b6\u6001\u65f6\uff0c\u4e5f\u4f1a\u4f20\u64ad\u9519\u8bef\u3002\u4f46\u662f\uff0c\u5f02\u5e38\u4f1a\u88ab\u5305\u88c5\u5728AggregateException\u4e2d\uff0c\u4f20\u81f3\u4e0b\u4e00\u4e2a\u5757\u3002<\/p>\n<h1><span id=\"i-3\">\u8ba8\u8bba<\/span><\/h1>\n<p>\u5728\u521b\u5efa\u7f51\u683c\u6216\u7ba1\u9053\u65f6\uff0c\u8003\u8651\u5982\u4f55\u5904\u7406\u9519\u8bef\u3002\u5728\u8f83\u4e3a\u7b80\u5355\u7684\u60c5\u51b5\u4e0b\uff0c\u6700\u597d\u4f20\u64ad\u9519\u8bef\u5e76\u5728\u6700\u540e\u4e00\u6b21\u6027\u5c06\u4ed6\u4eec\u5168\u90e8\u6355\u83b7\u3002\u5728\u66f4\u4e3a\u590d\u6742\u7684\u7f51\u683c\u4e2d\uff0c\u5219\u53ef\u80fd\u9700\u8981\u5728\u6570\u636e\u6d41\u5b8c\u6210\u65f6\u89c2\u5bdf\u6bcf\u4e2a\u5757\u3002<\/p>\n<p>\u5982\u679c\u5728\u5f02\u5e38\u51fa\u73b0\u65f6\uff0c\u4ecd\u65e7\u5e0c\u671b\u6570\u636e\u6d41\u5757\u7ee7\u7eed\u5de5\u4f5c\uff0c\u90a3\u4e48\u53ef\u4ee5\u628a\u5f02\u5e38\u5f53\u505a\u53e6\u4e00\u4e2a\u79cd\u6570\u636e\u6765\u5904\u7406\uff0c\u8ba9\u4ed6\u4eec\u8ddf\u7740\u6b63\u786e\u5904\u7406\u7684\u6570\u636e\u9879\u4e00\u8d77\u5728\u7f51\u683c\u4e2d\u6d41\u52a8\u3002\u4f7f\u7528\u8fd9\u79cd\u6a21\u5f0f\uff0c\u53ef\u4ee5\u8ba9\u6570\u636e\u6d41\u7f51\u683c\u7ee7\u7eed\u5de5\u4f5c\uff0c\u8fd9\u662f\u56e0\u4e3a\u5757\u672c\u8eab\u5c31\u4e0d\u4f1a\u51fa\u9519\uff0c\u800c\u4f1a\u7ee7\u7eed\u5904\u7406\u4e0b\u4e00\u4e2a\u6570\u636e\u9879\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Contents1 \u95ee\u98982 \u89e3\u51b3\u65b9\u68483 \u8ba8\u8bba \u95ee\u9898 \u5047\u8bbe\u9700\u8981\u5bf9\u6570\u636e\u6d41\u7f51\u683c\u4e2d\u53ef\u80fd\u51fa\u73b0\u7684\u9519\u8bef\u505a\u51fa\u54cd\u5e94 \u89e3\u51b3\u65b9\u6848 \u5982 [&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-855","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\/855","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=855"}],"version-history":[{"count":1,"href":"https:\/\/www.wayln.com\/index.php?rest_route=\/wp\/v2\/posts\/855\/revisions"}],"predecessor-version":[{"id":856,"href":"https:\/\/www.wayln.com\/index.php?rest_route=\/wp\/v2\/posts\/855\/revisions\/856"}],"wp:attachment":[{"href":"https:\/\/www.wayln.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=855"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wayln.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=855"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wayln.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=855"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}