{"id":10868,"date":"2024-05-20T18:09:19","date_gmt":"2024-05-20T18:09:19","guid":{"rendered":"https:\/\/putridparrot.com\/blog\/?p=10868"},"modified":"2024-05-20T18:09:19","modified_gmt":"2024-05-20T18:09:19","slug":"stringsyntaxattribute-and-the-useful-hints-on-datetime-tostring","status":"publish","type":"post","link":"https:\/\/putridparrot.com\/blog\/stringsyntaxattribute-and-the-useful-hints-on-datetime-tostring\/","title":{"rendered":"StringSyntaxAttribute and the useful hints on DateTime ToString"},"content":{"rendered":"<p>For a while I&#8217;ve used the <em>DateTime ToString<\/em> method and noticed the &#8220;hint&#8221; for showing the possible formats, but I&#8217;ve not really thought about how this happens, until now.<\/p>\n<p><em>Note: This attribute came in for projects targeting .NET 7 or later.<\/em><\/p>\n<p>The title of this post gives away the answer to how this all works, but let&#8217;s take a look anyway&#8230;<\/p>\n<p>If you type<\/p>\n<pre class=\"brush: csharp; title: ; notranslate\" title=\"\">\r\nDateTime.Now.ToString(&quot;\r\n<\/pre>\n<p>Visual Studio kindly shows a list of different formatting such as Long Date, Short Date etc. <\/p>\n<p>We can use this same technique in our own code (most likely libraries etc.) by simply adding the <em>StringSyntax<\/em> attribute to our method parameter(s). <\/p>\n<p>For example<\/p>\n<pre class=\"brush: csharp; title: ; notranslate\" title=\"\">\r\nstatic void Write(\r\n   &#x5B;StringSyntax(StringSyntaxAttribute.DateOnlyFormat)] string input)\r\n{\r\n    Console.WriteLine(input);\r\n}\r\n<\/pre>\n<p>This attribute does not enforce the format (in the example above), i.e. yo can enter whatever you like as a string. It just gives you some help (or hint) as to possible values. In the case of the <em>DateOnlyFormat<\/em> these are possible date formatters. <em>StringSyntax<\/em> actually supports other syntax hints such as <em>DateTimeFormat<\/em>, <em>GuidFormat<\/em> and more.<\/p>\n<p>Sadly (at least at the time of writing) I don&#8217;t see any options for custom formats.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>For a while I&#8217;ve used the DateTime ToString method and noticed the &#8220;hint&#8221; for showing the possible formats, but I&#8217;ve not really thought about how this happens, until now. Note: This attribute came in for projects targeting .NET 7 or later. The title of this post gives away the answer to how this all works, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[3],"tags":[],"class_list":["post-10868","post","type-post","status-publish","format-standard","hentry","category-c"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/putridparrot.com\/blog\/wp-json\/wp\/v2\/posts\/10868","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/putridparrot.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/putridparrot.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/putridparrot.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/putridparrot.com\/blog\/wp-json\/wp\/v2\/comments?post=10868"}],"version-history":[{"count":4,"href":"https:\/\/putridparrot.com\/blog\/wp-json\/wp\/v2\/posts\/10868\/revisions"}],"predecessor-version":[{"id":10872,"href":"https:\/\/putridparrot.com\/blog\/wp-json\/wp\/v2\/posts\/10868\/revisions\/10872"}],"wp:attachment":[{"href":"https:\/\/putridparrot.com\/blog\/wp-json\/wp\/v2\/media?parent=10868"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/putridparrot.com\/blog\/wp-json\/wp\/v2\/categories?post=10868"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/putridparrot.com\/blog\/wp-json\/wp\/v2\/tags?post=10868"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}