{"id":27,"date":"2023-10-18T16:02:51","date_gmt":"2023-10-18T16:02:51","guid":{"rendered":"http:\/\/kenneth.mobi\/?p=27"},"modified":"2023-10-18T17:06:03","modified_gmt":"2023-10-18T17:06:03","slug":"07-null%e6%9d%a1%e4%bb%b6%e8%a1%a8%e8%be%be%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/www.kenneth.mobi\/?p=27","title":{"rendered":"07.Null\u6761\u4ef6\u8868\u8fbe\u5f0f"},"content":{"rendered":"<pre><code class=\"language-csharp\">classNullOperator\n\n{\n\nstring[] sArray=newstring[] { bc, cde, null, efgg, null };\n\n\/\/\u4ee5\u524d\u7528\u6cd5\n\npublicvoidOldMethod()\n\n{\n\nforeach (stringiteminsArray)\n\n{\n\nvarlength=item==null?0:item.Length;\n\nConsole.WriteLine(length);\n\n}\n\nConsole.WriteLine(---);\n\n}\n\n\/\/\u65b0\u65b9\u6cd5\uff1a\n\npublicvoidNewMethod()\n\n{\n\nforeach (stringiteminsArray)\n\n{\n\nvarlength=item?.Length;\/\/\u5982\u679c\u4e3anull\u76f4\u63a5\u8f93\u51fanull\n\nConsole.WriteLine(length);\n\n}\n\nConsole.WriteLine(---);\n\nforeach (stringiteminsArray)\n\n{\n\nvarlength=item?.Length??0;\n\nConsole.WriteLine(length);\n\n}\n\n}\n\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>classNullOperator { string[] sArray=newstring[] { bc, c&#8230; &raquo; <a class=\"read-more-link\" href=\"https:\/\/www.kenneth.mobi\/?p=27\">\u95b1\u8b80\u5168\u6587<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"aside","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-27","post","type-post","status-publish","format-aside","hentry","category-c","post_format-post-format-aside"],"_links":{"self":[{"href":"https:\/\/www.kenneth.mobi\/index.php?rest_route=\/wp\/v2\/posts\/27","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.kenneth.mobi\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.kenneth.mobi\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.kenneth.mobi\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kenneth.mobi\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=27"}],"version-history":[{"count":2,"href":"https:\/\/www.kenneth.mobi\/index.php?rest_route=\/wp\/v2\/posts\/27\/revisions"}],"predecessor-version":[{"id":38,"href":"https:\/\/www.kenneth.mobi\/index.php?rest_route=\/wp\/v2\/posts\/27\/revisions\/38"}],"wp:attachment":[{"href":"https:\/\/www.kenneth.mobi\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=27"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.kenneth.mobi\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=27"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kenneth.mobi\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=27"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}