{"id":697,"date":"2026-10-16T17:01:09","date_gmt":"2026-10-16T09:01:09","guid":{"rendered":"https:\/\/www.erwa.cn\/?p=697"},"modified":"2026-10-16T17:01:11","modified_gmt":"2026-10-16T09:01:11","slug":"datetime-utcnow-datetime-now-%e6%9c%89%e4%bb%80%e4%b9%88%e5%8c%ba%e5%88%ab","status":"publish","type":"post","link":"https:\/\/www.erwa.cn\/index.php\/2026\/10\/16\/datetime-utcnow-datetime-now-%e6%9c%89%e4%bb%80%e4%b9%88%e5%8c%ba%e5%88%ab\/","title":{"rendered":"DateTime.UtcNow , DateTime.Now \u6709\u4ec0\u4e48\u533a\u522b"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">DateTime.UtcNow vs DateTime.Now\uff08C#\uff09<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e00\u53e5\u8bdd\u603b\u7ed3<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>DateTime.UtcNow<\/code><\/strong>\uff1a\u83b7\u53d6<strong>\u4e16\u754c\u534f\u8c03\u65f6\u95f4\uff08UTC\uff0c\u96f6\u65f6\u533a\uff09<\/strong>\uff0c\u4e0d\u53d7\u7535\u8111\u7cfb\u7edf\u65f6\u533a\u5f71\u54cd\u3002<\/li>\n\n\n\n<li><strong><code>DateTime.Now<\/code><\/strong>\uff1a\u83b7\u53d6<strong>\u672c\u5730\u65f6\u95f4<\/strong> = UTC \u65f6\u95f4 + \u5f53\u524d\u64cd\u4f5c\u7cfb\u7edf\u65f6\u533a\u504f\u79fb\u3002<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u8be6\u7ec6\u5bf9\u6bd4<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>var now = DateTime.Now;\nvar utcNow = DateTime.UtcNow;\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8868\u683c<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u9879\u76ee<\/th><th>DateTime.Now<\/th><th>DateTime.UtcNow<\/th><\/tr><\/thead><tbody><tr><td>\u542b\u4e49<\/td><td>\u672c\u673a\u7cfb\u7edf\u7684\u672c\u5730\u65f6\u95f4<\/td><td>UTC \u6807\u51c6\u65f6\u95f4\uff08\u683c\u6797\u5a01\u6cbb\u65f6\u95f4\uff09<\/td><\/tr><tr><td>Kind \u5c5e\u6027<\/td><td><code>DateTimeKind.Local<\/code><\/td><td><code>DateTimeKind.Utc<\/code><\/td><\/tr><tr><td>\u53d7\u7cfb\u7edf\u65f6\u533a\u5f71\u54cd<\/td><td>\u2705 \u4f1a\u53d8\uff0c\u6362\u65f6\u533a\u65f6\u95f4\u5c31\u53d8<\/td><td>\u274c \u4e0d\u53d7\u65f6\u533a\u5f71\u54cd\uff0c\u5168\u7403\u540c\u4e00\u65f6\u523b\u503c\u76f8\u540c<\/td><\/tr><tr><td>\u590f\u4ee4\u65f6<\/td><td>\u2705 \u4f1a\u53d7\u590f\u4ee4\u65f6\u5207\u6362\u5f71\u54cd\uff0c\u53ef\u80fd\u51fa\u73b0\u65f6\u95f4\u91cd\u590d \/ \u65ad\u5c42<\/td><td>\u274c \u6ca1\u6709\u590f\u4ee4\u65f6\u95ee\u9898<\/td><\/tr><tr><td>\u63a8\u8350\u573a\u666f<\/td><td>\u4ec5\u5c55\u793a\u7ed9\u5f53\u524d\u672c\u5730\u7528\u6237\u770b<\/td><td><strong>\u6570\u636e\u5e93\u5b58\u50a8\u3001\u65e5\u5fd7\u3001\u8de8\u65f6\u533a\u7cfb\u7edf\u3001\u65f6\u95f4\u8ba1\u7b97\u3001MES \/ \u4e0a\u4f4d\u673a\u5f3a\u70c8\u63a8\u8350<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b80\u5355\u4f8b\u5b50<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5047\u8bbe\u4f60\u7535\u8111\u65f6\u533a\u662f\u4e1c\u516b\u533a\uff08UTC+8\uff09\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>UtcNow = 2026-10-16 03:00:00\nNow    = 2026-10-16 11:00:00\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><code>Now = UtcNow + 8\u5c0f\u65f6<\/code><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u91cd\u70b9\u5751\uff1a<strong>\u4e0d\u8981\u7528 DateTime.Now \u5b58\u5230\u6570\u636e\u5e93\uff01<\/strong> \u5982\u679c\u670d\u52a1\u5668\u6362\u65f6\u533a\u3001\u5ba2\u6237\u673a\u5668\u65f6\u533a\u4e0d\u4e00\u6837\uff0c\u65f6\u95f4\u5c31\u4e71\u6389\u3002\u65e5\u5fd7\u3001\u8bbe\u5907\u91c7\u96c6\u65f6\u95f4\u3001\u8ba2\u5355\u65f6\u95f4\u4e00\u5f8b\u4f18\u5148\u5b58 UTC\u3002<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e92\u76f8\u8f6c\u6362<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>DateTime localTime = utcTime.ToLocalTime();   \/\/ UTC \u2192 \u672c\u5730\nDateTime utcTime = now.ToUniversalTime();     \/\/ \u672c\u5730 \u2192 UTC\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u989d\u5916\u63d0\u9192\uff08\u8e29\u5751\u70b9\uff09<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><code>DateTime<\/code> \u7684 Kind \u5f88\u91cd\u8981\uff01 \u5982\u679c\u4f60\u624b\u52a8\u6784\u9020 <code>new DateTime(xxx)<\/code>\uff0cKind \u662f <code>Unspecified<\/code>\uff0c\u8c03\u7528 <code>.ToUniversalTime()<\/code> \u4f1a\u628a\u5b83\u5f53\u6210\u672c\u5730\u65f6\u95f4\u53bb\u8f6c\u6362\uff0c\u5bb9\u6613\u51fa\u9519\u3002<\/li>\n\n\n\n<li>\u66f4\u9ad8\u7248\u672c\u63a8\u8350\uff1a<strong><code>DateTimeOffset.UtcNow<\/code><\/strong> \u81ea\u5e26\u65f6\u533a\u504f\u79fb\u4fe1\u606f\uff0c\u6bd4 DateTime \u66f4\u7a33\u59a5\uff0c\u8de8\u65f6\u533a\u573a\u666f\u9996\u9009\u3002<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">\u9002\u5408\u4f60\u7684\u573a\u666f\uff08MES \/ \u4e0a\u4f4d\u673a\u3001PLC \u91c7\u96c6\u3001\u65e5\u5fd7\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u2705 <strong>\u91c7\u96c6\u8bbe\u5907\u65f6\u95f4\u3001\u5199\u65e5\u5fd7\u3001\u5165\u5e93\uff1a\u7528 DateTime.UtcNow<\/strong> \u539f\u56e0\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u591a\u53f0\u7535\u8111\u65f6\u533a\u4e0d\u4e00\u81f4\u4e5f\u4e0d\u4f1a\u4e71\uff1b<\/li>\n\n\n\n<li>\u4e0d\u5b58\u5728\u590f\u4ee4\u65f6\u8df3\u53d8\uff1b<\/li>\n\n\n\n<li>\u65e5\u5fd7\u6309\u65f6\u95f4\u6392\u5e8f\u4e0d\u4f1a\u51fa\u73b0\u8de8\u65f6\u533a\u9519\u4e71\u3002 \u754c\u9762\u5c55\u793a\u7684\u65f6\u5019\uff0c\u518d\u8f6c\u6210\u672c\u5730\u65f6\u95f4\u7ed9\u64cd\u4f5c\u5458\u770b\u5373\u53ef\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>DateTime.UtcNow vs DateTime.Now\uff08C#\uff09 \u4e00\u53e5\u8bdd\u603b\u7ed3 \u8be6\u7ec6\u5bf9\u6bd4 \u8868\u683c \u9879\u76ee Da [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[12],"class_list":["post-697","post","type-post","status-publish","format-standard","hentry","category-13","tag-12"],"_links":{"self":[{"href":"https:\/\/www.erwa.cn\/index.php\/wp-json\/wp\/v2\/posts\/697","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.erwa.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.erwa.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.erwa.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.erwa.cn\/index.php\/wp-json\/wp\/v2\/comments?post=697"}],"version-history":[{"count":1,"href":"https:\/\/www.erwa.cn\/index.php\/wp-json\/wp\/v2\/posts\/697\/revisions"}],"predecessor-version":[{"id":698,"href":"https:\/\/www.erwa.cn\/index.php\/wp-json\/wp\/v2\/posts\/697\/revisions\/698"}],"wp:attachment":[{"href":"https:\/\/www.erwa.cn\/index.php\/wp-json\/wp\/v2\/media?parent=697"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.erwa.cn\/index.php\/wp-json\/wp\/v2\/categories?post=697"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.erwa.cn\/index.php\/wp-json\/wp\/v2\/tags?post=697"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}