{"id":462,"date":"2018-01-18T12:43:30","date_gmt":"2018-01-18T04:43:30","guid":{"rendered":"http:\/\/www.ponybai.com\/?p=462"},"modified":"2018-01-18T12:43:30","modified_gmt":"2018-01-18T04:43:30","slug":"salesforce-visualforce-%e5%9f%ba%e7%a1%803%ef%bc%89%e4%bd%bf%e7%94%a8%e5%8f%98%e9%87%8f","status":"publish","type":"post","link":"http:\/\/www.ponybai.com\/?p=462","title":{"rendered":"Salesforce Visualforce (\u57fa\u78403\uff09\u4f7f\u7528\u53d8\u91cf"},"content":{"rendered":"<div class=\"nested0\">\n<h2 id=\"Tdxn4tBK-heading1\" class=\"helpHead2\">\u5b66\u4e60\u76ee\u6807<\/h2>\n<div class=\"body\">\n<div id=\"p2\" class=\"p\">\u5b8c\u6210\u672c\u5355\u5143\u540e\uff0c\u60a8\u5c06\u80fd\u591f\uff1a<\/p>\n<ul class=\"ul bulletList\">\n<li class=\"li\">\u89e3\u91ca\u4ec0\u4e48\u662fVisualforce\u8868\u8fbe\u5f0f\uff0c\u5e76\u63cf\u8ff0\u5b83\u7684\u7528\u9014\u3002<\/li>\n<li class=\"li\">\u5217\u51fa\u53ef\u7528\u4e8eVisualforce\u8868\u8fbe\u5f0f\u7684\u4e09\u4e2a\u6216\u66f4\u591a\u5168\u5c40\u53d8\u91cf\u3002<\/li>\n<li class=\"li\">\u5c06Visualforce\u8868\u8fbe\u5f0f\u6dfb\u52a0\u5230Visualforce\u9875\u9762\u3002<\/li>\n<li class=\"li\">\u5728Visualforce\u8868\u8fbe\u5f0f\u4e2d\u4f7f\u7528\u4e00\u4e2a\u51fd\u6570\u3002<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"visualforce_variables_expressions_intro\" class=\"topic nested0\" lang=\"en-us\" xml:lang=\"en-us\">\n<h2 id=\"Tdxn4tBK-heading2\" class=\"helpHead2\"><span id=\"topic-title\" class=\"ph\">\u5168\u5c40\u53d8\u91cf\u548cVisualforce\u8868\u8fbe\u5f0f\u7b80\u4ecb<\/span><\/h2>\n<div class=\"body\">\n<div class=\"shortdesc\">Visualforce\u9875\u9762\u53ef\u4ee5\u663e\u793a\u4ece\u6570\u636e\u5e93\u6216Web\u670d\u52a1\u4e2d\u68c0\u7d22\u7684\u6570\u636e\uff0c\u6839\u636e\u767b\u5f55\u7684\u7528\u6237\u548c\u67e5\u770b\u9875\u9762\u800c\u53d8\u5316\u7684\u6570\u636e\u7b49\u7b49\u3002\u8fd9\u4e2a\u52a8\u6001\u6570\u636e\u662f\u901a\u8fc7\u4f7f\u7528\u7531\u9875\u9762\u63a7\u5236\u5668\u63d0\u4f9b\u7684\u5168\u5c40\u53d8\u91cf\uff0c\u8ba1\u7b97\u548c\u5c5e\u6027\u5728\u6807\u8bb0\u4e2d\u8bbf\u95ee\u7684\u3002\u8fd9\u4e9b\u4e00\u8d77\u88ab\u63cf\u8ff0\u4e3aVisualforce\u8868\u8fbe\u5f0f\u3002\u4f7f\u7528\u8868\u8fbe\u5f0f\u5c06\u52a8\u6001\u8f93\u51fa\u6216\u503c\u4f20\u9012\u7ed9\u7ec4\u4ef6\uff0c\u65b9\u6cd5\u662f\u5c06\u5b83\u4eec\u5206\u914d\u7ed9\u5c5e\u6027\u3002<br \/>\nVisualforce\u8868\u8fbe\u5f0f\u662f\u53ef\u4ee5\u89e3\u6790\u4e3a\u5355\u4e2a\u503c\u7684\u4efb\u4f55\u4e00\u7ec4\u5b57\u9762\u503c\uff0c\u53d8\u91cf\uff0c\u5b50\u8868\u8fbe\u5f0f\u6216\u8fd0\u7b97\u7b26\u3002\u8868\u8fbe\u5f0f\u4e2d\u4e0d\u5141\u8bb8\u4f7f\u7528\u65b9\u6cd5\u8c03\u7528\u3002<\/p>\n<\/div>\n<p class=\"p\">Visualforce\u4e2d\u7684\u8868\u8fbe\u5f0f\u8bed\u6cd5\u662f:\u00a0<samp>{!\u00a0<var class=\"keyword varname\">expression<\/var>\u00a0}<\/samp><\/p>\n<p>\u4efb\u4f55\u5728{\uff01 }\u5206\u9694\u7b26\u5c06\u5728\u9875\u9762\u5448\u73b0\u6216\u4f7f\u7528\u65f6\u52a8\u6001\u66ff\u6362\u3002\u7a7a\u767d\u88ab\u5ffd\u7565\u3002<\/p>\n<p>\u7ed3\u679c\u503c\u53ef\u4ee5\u662f\u4e00\u4e2a\u539f\u59cb\uff08\u6574\u6570\uff0c\u5b57\u7b26\u4e32\u7b49\uff09\uff0c\u4e00\u4e2a\u5e03\u5c14\u503c\uff0c\u4e00\u4e2asObject\uff0c\u4e00\u4e2a\u63a7\u5236\u5668\u65b9\u6cd5\uff08\u5982\u4e00\u4e2a\u52a8\u4f5c\u65b9\u6cd5\uff09\u4ee5\u53ca\u5176\u4ed6\u6709\u7528\u7684\u7ed3\u679c\u3002<\/p>\n<\/div>\n<\/div>\n<div id=\"visualforce_variables_expressions_globals\" class=\"topic task nested0\" lang=\"en-us\" xml:lang=\"en-us\">\n<h2 id=\"Tdxn4tBK-heading3\" class=\"helpHead2\"><span id=\"topic-title\" class=\"ph\">\u5168\u5c40\u53d8\u91cf<\/span><\/h2>\n<div class=\"body taskbody\">\n<div class=\"shortdesc\">\u4f7f\u7528\u5168\u5c40\u53d8\u91cf\u8bbf\u95ee\u548c\u663e\u793aVisualforce\u6807\u8bb0\u4e2d\u7684\u7cfb\u7edf\u503c\u548c\u8d44\u6e90\u3002<br \/>\n\u4f8b\u5982\uff0cVisualforce\u5728\u540d\u4e3a$ User\u7684\u5168\u5c40\u53d8\u91cf\u4e2d\u63d0\u4f9b\u6709\u5173\u767b\u5f55\u7528\u6237\u7684\u4fe1\u606f\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u5f62\u5f0f\u7684\u8868\u8fbe\u5f0f\u6765\u8bbf\u95ee$ User\u5168\u5c40\u53d8\u91cf\uff08\u4ee5\u53ca\u4efb\u4f55\u5176\u4ed6\u5b57\u6bb5\uff09\u7684\u5b57\u6bb5\uff1a{\uff01 $ GlobalName.fieldName}\u3002<\/p>\n<\/div>\n<ol class=\"ol steps enumList\">\n<li class=\"li step\"><span class=\"ph cmd\">\u6253\u5f00\u5f00\u53d1\u8005\u63a7\u5236\u53f0\uff0c\u7136\u540e\u70b9\u51fb <span class=\"ph menucascade\"><strong class=\"ph uicontrol\">File<\/strong>\u00a0|\u00a0<strong class=\"ph uicontrol\">New<\/strong>\u00a0|\u00a0<strong class=\"ph uicontrol\">Visualforce Page<\/strong><\/span> \u521b\u5efa\u4e00\u4e2a\u65b0\u7684Visualforce\u9875\u9762\u3002\u8f93\u5165UserStatus\u4f5c\u4e3a\u9875\u9762\u540d\u79f0\u3002<\/span><\/li>\n<li class=\"li step\">\u5728\u7f16\u8f91\u5668\u4e2d\uff0c\u7528\u4ee5\u4e0b\u66ff\u6362\u6807\u8bb0\u3002\n<div class=\"itemgroup info\">\n<div class=\"codeblock\">\n<pre class=\"line-numbers code-toolbar language-java\"><code class=\"  language-java\"><span class=\"token operator\">&lt;<\/span>apex<span class=\"token operator\">:<\/span>page<span class=\"token operator\">&gt;<\/span>\n    \n    <span class=\"token operator\">&lt;<\/span>apex<span class=\"token operator\">:<\/span>pageBlock title<span class=\"token operator\">=<\/span><span class=\"token string\">\"User Status\"<\/span><span class=\"token operator\">&gt;<\/span>\n        <span class=\"token operator\">&lt;<\/span>apex<span class=\"token operator\">:<\/span>pageBlockSection columns<span class=\"token operator\">=<\/span><span class=\"token string\">\"1\"<\/span><span class=\"token operator\">&gt;<\/span>\n        \t\n            \n            \n        <span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>apex<span class=\"token operator\">:<\/span>pageBlockSection<span class=\"token operator\">&gt;<\/span>\n    <span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>apex<span class=\"token operator\">:<\/span>pageBlock<span class=\"token operator\">&gt;<\/span>\n    \n<span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>apex<span class=\"token operator\">:<\/span>page<span class=\"token operator\">&gt;<\/span><\/code><\/pre>\n<\/div>\n<\/div>\n<div class=\"itemgroup stepresult\">\u8fd9\u4e2a\u6807\u8bb0\u521b\u5efa\u4e00\u4e2a\u6846\uff0c\u4e3a\u60a8\u51c6\u5907\u6dfb\u52a0\u4e00\u4e9b\u6709\u7528\u7684\u4fe1\u606f\u3002<\/div>\n<\/li>\n<li class=\"li step\"><span class=\"ph cmd\">\u70b9\u51fb <strong class=\"ph uicontrol\">Preview<\/strong> \u6253\u5f00\u60a8\u7684\u9875\u9762\u7684\u9884\u89c8\uff0c\u60a8\u53ef\u4ee5\u5728\u8fdb\u884c\u66f4\u6539\u65f6\u67e5\u770b\u3002<\/span><\/li>\n<li class=\"li step\">\u5728&lt;apex\uff1apageBlockSection&gt;\u6807\u7b7e\u4e4b\u95f4\u6dfb\u52a0\u4ee5\u4e0b\u6807\u8bb0\u3002\n<div class=\"itemgroup info\">\n<div class=\"codeblock\">\n<pre class=\"line-numbers code-toolbar language-java\"><code class=\"  language-java\"><span class=\"token punctuation\">{<\/span><span class=\"token operator\">!<\/span> $User<span class=\"token punctuation\">.<\/span>FirstName <span class=\"token punctuation\">}<\/span><\/code><\/pre>\n<\/div>\n<\/div>\n<div class=\"itemgroup stepresult\">\u60a8\u5e94\u8be5\u5728\u60a8\u521b\u5efa\u7684\u7528\u6237\u72b6\u6001\u9762\u677f\u4e2d\u770b\u5230\u60a8\u7684\u540d\u5b57\u3002<\/div>\n<\/li>\n<li class=\"li step\">\u5c06\u53e6\u5916\u4e24\u4e2a\u4f7f\u7528$ User\u5168\u5c40\u53d8\u91cf\u7684\u8868\u8fbe\u5f0f\u6dfb\u52a0\u5230User Status\u9762\u677f\u7684\u6807\u8bb0\u4e2d\uff0c\u4ee5\u4f7f\u9875\u9762\u5982\u4e0b\u6240\u793a\u3002\n<div class=\"itemgroup info\">\n<div class=\"codeblock\">\n<pre class=\"line-numbers code-toolbar language-java\"><code class=\"  language-java\"><span class=\"token operator\">&lt;<\/span>apex<span class=\"token operator\">:<\/span>page<span class=\"token operator\">&gt;<\/span>\n    \n    <span class=\"token operator\">&lt;<\/span>apex<span class=\"token operator\">:<\/span>pageBlock title<span class=\"token operator\">=<\/span><span class=\"token string\">\"User Status\"<\/span><span class=\"token operator\">&gt;<\/span>\n        <span class=\"token operator\">&lt;<\/span>apex<span class=\"token operator\">:<\/span>pageBlockSection columns<span class=\"token operator\">=<\/span><span class=\"token string\">\"1\"<\/span><span class=\"token operator\">&gt;<\/span>\n            \n            <span class=\"token punctuation\">{<\/span><span class=\"token operator\">!<\/span> $User<span class=\"token punctuation\">.<\/span>FirstName <span class=\"token punctuation\">}<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token operator\">!<\/span> $User<span class=\"token punctuation\">.<\/span>LastName <span class=\"token punctuation\">}<\/span> \n           <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span><span class=\"token operator\">!<\/span> $User<span class=\"token punctuation\">.<\/span>Username <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span>\n            \n        <span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>apex<span class=\"token operator\">:<\/span>pageBlockSection<span class=\"token operator\">&gt;<\/span>\n    <span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>apex<span class=\"token operator\">:<\/span>pageBlock<span class=\"token operator\">&gt;<\/span>\n    \n<span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>apex<span class=\"token operator\">:<\/span>page<span class=\"token operator\">&gt;<\/span><\/code><\/pre>\n<\/div>\n<\/div>\n<\/li>\n<\/ol>\n<div class=\"section result\">\n<p class=\"p\">{\uff01 &#8230;}\u544a\u8bc9Visualforce\uff0c\u5927\u62ec\u53f7\u5185\u7684\u4efb\u4f55\u5185\u5bb9\u90fd\u662f\u52a8\u6001\u7684\uff0c\u5e76\u4ee5\u8868\u8fbe\u5f0f\u8bed\u8a00\u7f16\u5199\u3002\u5b83\u7684\u503c\u662f\u5728\u8fd0\u884c\u65f6\u8ba1\u7b97\u548c\u66ff\u6362\u7684\uff0c\u5f53\u6709\u4eba\u67e5\u770b\u9875\u9762\u65f6\u3002<\/p>\n<div class=\"p\">Visualforce\u8868\u8fbe\u5f0f\u4e0d\u533a\u5206\u5927\u5c0f\u5199\uff0c\u5e76\u4e14{\uff01 &#8230;}\u88ab\u5ffd\u7565\u3002\u6240\u4ee5\u8fd9\u4e9b\u8868\u8fbe\u5f0f\u90fd\u4ea7\u751f\u76f8\u540c\u7684\u503c\uff1a<\/p>\n<ul class=\"ul bulletList\">\n<li class=\"li\"><samp>{! $User.FirstName}<\/samp><\/li>\n<li class=\"li\"><samp>{!$USER.FIRSTNAME}<\/samp><\/li>\n<li class=\"li\"><samp>{! $user.firstname }<\/samp><\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"visualforce_variables_expressions_formulas\" class=\"topic task nested0\" lang=\"en-us\" xml:lang=\"en-us\">\n<h2 id=\"Tdxn4tBK-heading4\" class=\"helpHead2\"><span id=\"topic-title\" class=\"ph\">\u516c\u5f0f\u8868\u8fbe\u5f0f<\/span><\/h2>\n<div class=\"body taskbody\">\n<div class=\"shortdesc\">Visualforce\u4f7f\u60a8\u53ef\u4ee5\u5728\u8868\u8fbe\u5f0f\u8bed\u8a00\u4e2d\u4f7f\u7528\u66f4\u591a\u7684\u5168\u5c40\u53d8\u91cf\u3002\u5b83\u4e5f\u652f\u6301\u8ba9\u4f60\u64cd\u7eb5\u503c\u7684\u516c\u5f0f\u3002<br \/>\n\u4f8b\u5982\uff0c\uff06\u5b57\u7b26\u662f\u8fde\u63a5\u5b57\u7b26\u4e32\u7684\u516c\u5f0f\u8bed\u8a00\u8fd0\u7b97\u7b26\u3002<\/div>\n<div><\/div>\n<ol class=\"ol steps enumList\">\n<li class=\"li step\">\u5728\u60a8\u7684UserStatus\u9875\u9762\u4e2d\uff0c\u4f7f\u7528\u4ee5\u4e0b\u516c\u5f0f\u8868\u8fbe\u5f0f\u66ff\u6362\u540d\u5b57\u548c\u59d3\u6c0f\u7684\u5355\u72ec\u8868\u8fbe\u5f0f\u3002\n<div class=\"itemgroup info\">\n<div class=\"codeblock\">\n<pre class=\"line-numbers code-toolbar language-java\"><code class=\"  language-java\"><span class=\"token punctuation\">{<\/span><span class=\"token operator\">!<\/span> $User<span class=\"token punctuation\">.<\/span>FirstName <span class=\"token operator\">&amp;<\/span> <span class=\"token string\">' '<\/span> <span class=\"token operator\">&amp;<\/span> $User<span class=\"token punctuation\">.<\/span>LastName <span class=\"token punctuation\">}<\/span><\/code><\/pre>\n<\/div>\n<\/div>\n<div class=\"itemgroup stepresult\">\u8fd9\u4e2a\u8868\u8fbe\u5f0f\u5c06\u767b\u5f55\u7684\u7528\u6237\u7684\u540d\u5b57\u548c\u59d3\u6c0f\u7ec4\u5408\u5728\u4e00\u8d77\uff0c\u7528\u7a7a\u683c\u5206\u5f00\u3002\u8f93\u51fa\u5e94\u8be5\u770b\u8d77\u6765\u4e00\u6837\u3002<\/div>\n<\/li>\n<li class=\"li step\">\u5c06\u4ee5\u4e0b\u5185\u5bb9\u6dfb\u52a0\u5230\u7528\u6237\u4fe1\u606f\u4e0b\u65b9\u7684\u9875\u9762\u6807\u8bb0\u4e2d\u3002\n<div class=\"itemgroup info\">\n<div class=\"codeblock\">\n<pre class=\"line-numbers code-toolbar language-java\"><code class=\"  language-java\"><span class=\"token operator\">&lt;<\/span>p<span class=\"token operator\">&gt;<\/span> Today's Date is <span class=\"token punctuation\">{<\/span><span class=\"token operator\">!<\/span> <span class=\"token function\">TODAY<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">}<\/span> <span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>p<span class=\"token operator\">&gt;<\/span>\n<span class=\"token operator\">&lt;<\/span>p<span class=\"token operator\">&gt;<\/span> Next week it will be <span class=\"token punctuation\">{<\/span><span class=\"token operator\">!<\/span> <span class=\"token function\">TODAY<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">+<\/span> <span class=\"token number\">7<\/span> <span class=\"token punctuation\">}<\/span> <span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>p<span class=\"token operator\">&gt;<\/span><\/code><\/pre>\n<\/div>\n<\/div>\n<div class=\"itemgroup stepresult\">\u8fd9\u4e9b\u662f\u4f7f\u7528TODAY\uff08\uff09\u51fd\u6570\u7684\u66f4\u590d\u6742\u7684\u516c\u5f0f\u3002\u51fd\u6570\u662f\u5185\u7f6e\u7684\u8ba1\u7b97\uff0c\u60a8\u53ef\u4ee5\u901a\u8fc7\u540d\u79f0\u540e\u9762\u7684\u62ec\u53f7\u6765\u8bc6\u522b\u3002<br \/>\n\u7b2c\u4e00\u4e2a\u8868\u8fbe\u5f0f\u7b80\u5355\u5730\u8ba1\u7b97\u5f53\u524d\u65e5\u671f\uff0c\u7b2c\u4e8c\u4e2a\u8868\u8fbe\u5f0f\u4f7f\u7528\u52a0\u6cd5\u8fd0\u7b97\u7b26\u5728\u65e5\u671f\u4e2d\u6dfb\u52a0\u4e03\u5929\u3002\u9875\u9762\u4e2d\u7684\u8f93\u51fa\u5c06\u5982\u4e0b\u6240\u793a\u3002<\/p>\n<div class=\"p\">\n<div class=\"codeblock\">\n<pre class=\"line-numbers code-toolbar language-java\"><code class=\"  language-java\">Today's Date is Thu Sep <span class=\"token number\">18<\/span> <span class=\"token number\">00<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">00<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">00<\/span> GMT <span class=\"token number\">2014<\/span>\nNext week it will be Thu Sep <span class=\"token number\">25<\/span> <span class=\"token number\">00<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">00<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">00<\/span> GMT <span class=\"token number\">2014<\/span><\/code><\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/li>\n<li class=\"li step\">\u5c06\u4ee5\u4e0b\u5185\u5bb9\u6dfb\u52a0\u5230\u65e5\u671f\u8868\u8fbe\u5f0f\u4e0b\u9762\u7684\u9875\u9762\u6807\u8bb0\u4e2d\u3002\n<div class=\"itemgroup info\">\n<div class=\"codeblock\">\n<pre class=\"line-numbers code-toolbar language-java\"><code class=\"  language-java\"><span class=\"token operator\">&lt;<\/span>p<span class=\"token operator\">&gt;<\/span>The year today is <span class=\"token punctuation\">{<\/span><span class=\"token operator\">!<\/span> <span class=\"token function\">YEAR<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">TODAY<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>p<span class=\"token operator\">&gt;<\/span>\n<span class=\"token operator\">&lt;<\/span>p<span class=\"token operator\">&gt;<\/span>Tomorrow will be day number  <span class=\"token punctuation\">{<\/span><span class=\"token operator\">!<\/span> <span class=\"token function\">DAY<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">TODAY<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">+<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>p<span class=\"token operator\">&gt;<\/span>\n<span class=\"token operator\">&lt;<\/span>p<span class=\"token operator\">&gt;<\/span>Let's find a maximum<span class=\"token operator\">:<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token operator\">!<\/span> <span class=\"token function\">MAX<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">4<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">6<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">4<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">}<\/span> <span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>p<span class=\"token operator\">&gt;<\/span>\n<span class=\"token operator\">&lt;<\/span>p<span class=\"token operator\">&gt;<\/span>The square root of <span class=\"token number\">49<\/span> is <span class=\"token punctuation\">{<\/span><span class=\"token operator\">!<\/span> <span class=\"token function\">SQRT<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">49<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>p<span class=\"token operator\">&gt;<\/span>\n<span class=\"token operator\">&lt;<\/span>p<span class=\"token operator\">&gt;<\/span>Is it <span class=\"token boolean\">true<\/span><span class=\"token operator\">?<\/span>  <span class=\"token punctuation\">{<\/span><span class=\"token operator\">!<\/span> <span class=\"token function\">CONTAINS<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">'salesforce.com'<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">'force.com'<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>p<span class=\"token operator\">&gt;<\/span><\/code><\/pre>\n<\/div>\n<\/div>\n<div class=\"itemgroup stepresult\">\n<div class=\"p\">\u60a8\u7684\u7f51\u9875\u4e0a\u7684\u7ed3\u679c\u5c06\u662f\u8fd9\u6837\u7684\u3002<\/p>\n<div class=\"fig fignone\"><span class=\"image image-block\"><img decoding=\"async\" class=\"image image-block\" src=\"https:\/\/res.cloudinary.com\/hy4kyit2a\/image\/upload\/doc\/trailhead\/en-us9ec6f744ba9bc7de15d3236c7b1b3e2d.png\" alt=\"Visualforce expressions playground\" \/><\/span><\/div>\n<\/div>\n<p>\u4e00\u4e9b\u51fd\u6570\uff0c\u5982TODAY\uff08\uff09\uff0c\u6709\u4e00\u4e2a\u7a7a\u62ec\u53f7\uff0c\u4f46\u6709\u4e9b\u51fd\u6570\u9700\u8981\u51fd\u6570\u7528\u6765\u8ba1\u7b97\u7684\u53c2\u6570\u3002\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cYEAR\uff08\uff09\u63a5\u53d7\u4e00\u4e2a\u7531TODAY\uff08\uff09\u51fd\u6570\u63d0\u4f9b\u7684\u65e5\u671f\u53c2\u6570\uff0c\u5b83\u4e0d\u5e26\u4efb\u4f55\u53c2\u6570\u3002 MAX\uff08\uff09\u51fd\u6570\u53ef\u4ee5\u4f7f\u7528\u4efb\u610f\u6570\u91cf\u7684\u53c2\u6570\u3002<\/p>\n<p>CONTAINS\uff08\uff09\u51fd\u6570\u7279\u522b\u6709\u8da3\u3002\u5b83\u8fd4\u56de\u4e00\u4e2a\u5e03\u5c14\u503c\uff1atrue\u6216\u8005false\u3002\u5b83\u6bd4\u8f83\u6587\u672c\u7684\u4e24\u4e2a\u53c2\u6570\uff0c\u5982\u679c\u7b2c\u4e00\u4e2a\u53c2\u6570\u5305\u542b\u7b2c\u4e8c\u4e2a\u53c2\u6570\uff0c\u5219\u8fd4\u56detrue\u3002\u5982\u679c\u4e0d\u662f\uff0c\u5219\u8fd4\u56defalse\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5b57\u7b26\u4e32\u201cforce.com\u201d\u5305\u542b\u5728\u5b57\u7b26\u4e32\u201csalesforce.com\u201d\u4e2d\uff0c\u6240\u4ee5\u5b83\u8fd4\u56detrue\u3002<\/p>\n<\/div>\n<\/li>\n<\/ol>\n<\/div>\n<\/div>\n<div id=\"visualforce_variables_expressions_conditional\" class=\"topic task nested0\" lang=\"en-us\" xml:lang=\"en-us\">\n<h2 id=\"Tdxn4tBK-heading5\" class=\"helpHead2\"><span id=\"topic-title\" class=\"ph\">\u6761\u4ef6\u8868\u8fbe\u5f0f<\/span><\/h2>\n<div class=\"body taskbody\">\n<div class=\"shortdesc\">\u4f7f\u7528\u6761\u4ef6\u8868\u8fbe\u5f0f\u6839\u636e\u8868\u8fbe\u5f0f\u7684\u503c\u663e\u793a\u4e0d\u540c\u7684\u4fe1\u606f\u3002<br \/>\n\u4f8b\u5982\uff0c\u5982\u679c\u53d1\u7968\u6ca1\u6709\u8ba2\u5355\u9879\uff0c\u5219\u53ef\u80fd\u9700\u8981\u663e\u793a\u5355\u8bcd\u201cnone\u201d\u800c\u4e0d\u662f\u7a7a\u767d\u5217\u8868\u3002\u6216\u8005\uff0c\u5982\u679c\u67d0\u4e2a\u9879\u76ee\u5df2\u8fc7\u671f\uff0c\u5219\u53ef\u80fd\u9700\u8981\u663e\u793a\u201c\u5df2\u7ed3\u675f\u201d\uff0c\u800c\u4e0d\u662f\u663e\u793a\u7ed3\u675f\u65e5\u671f\u548c\u65f6\u95f4\u3002<\/div>\n<div class=\"section context\">\n<div class=\"p\">\u60a8\u53ef\u4ee5\u4f7f\u7528\u6761\u4ef6\u516c\u5f0f\u8868\u8fbe\u5f0f\uff08\u5982IF\uff08\uff09\uff09\u5728Visualforce\u4e2d\u6267\u884c\u6b64\u64cd\u4f5c\u3002 IF\uff08\uff09\u8868\u8fbe\u5f0f\u6709\u4e09\u4e2a\u53c2\u6570\uff1a<\/p>\n<ul class=\"ul bulletList\">\n<li class=\"li\">\u9996\u5148\u662f\u4e00\u4e2a\u5e03\u5c14\u503c\uff1a\u4e0d\u7ba1\u662f\u771f\u8fd8\u662f\u5047\u3002\u4f8b\u5982\uff0c\u60a8\u4ee5\u524d\u4f7f\u7528\u7684CONTAINS\uff08\uff09\u51fd\u6570\u3002<\/li>\n<li class=\"li\">\u7b2c\u4e8c\u4e2a\u53c2\u6570\u662f\u7b2c\u4e00\u4e2a\u53c2\u6570\u4e3atrue\u65f6\u8fd4\u56de\u7684\u503c\u3002<\/li>\n<li class=\"li\">\u7b2c\u4e09\u4e2a\u53c2\u6570\u662f\u7b2c\u4e00\u4e2a\u53c2\u6570\u4e3afalse\u65f6\u5c06\u8fd4\u56de\u7684\u503c\u3002<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<ol class=\"ol steps enumList\">\n<li class=\"li step\">\u5728\u60a8\u7684UserStatus\u9875\u9762\u7684\u5176\u4ed6\u8868\u8fbe\u5f0f\u4e0b\u9762\uff0c\u6dfb\u52a0\u4ee5\u4e0b\u4ee3\u7801\u3002\n<div class=\"itemgroup info\">\n<div class=\"codeblock\">\n<pre class=\"line-numbers code-toolbar language-java\"><code class=\"  language-java\"><span class=\"token operator\">&lt;<\/span>p<span class=\"token operator\">&gt;<\/span><span class=\"token punctuation\">{<\/span><span class=\"token operator\">!<\/span> <span class=\"token function\">IF<\/span><span class=\"token punctuation\">(<\/span> <span class=\"token function\">CONTAINS<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">'salesforce.com'<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">'force.com'<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> \n     <span class=\"token string\">'Yep'<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">'Nope'<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>p<span class=\"token operator\">&gt;<\/span>\n<span class=\"token operator\">&lt;<\/span>p<span class=\"token operator\">&gt;<\/span><span class=\"token punctuation\">{<\/span><span class=\"token operator\">!<\/span> <span class=\"token function\">IF<\/span><span class=\"token punctuation\">(<\/span> <span class=\"token function\">DAY<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">TODAY<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">15<\/span><span class=\"token punctuation\">,<\/span> \n     <span class=\"token string\">'Before the 15th'<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">'The 15th or after'<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>p<span class=\"token operator\">&gt;<\/span><\/code><\/pre>\n<\/div>\n<p>\u5728\u4fdd\u5b58\u66f4\u6539\u5e76\u67e5\u770b\u7ed3\u679c\u4e4b\u524d\uff0c\u5c1d\u8bd5\u9884\u6d4b\u5b83\u4eec\u5c06\u4f1a\u662f\u4ec0\u4e48\uff01<br \/>\n\u7b2c\u4e00\u4e2a\u8868\u8fbe\u5f0f\u4f7f\u7528\u4e0e\u4ee5\u524d\u76f8\u540c\u7684CONTAINS\uff08\uff09\u51fd\u6570\u8ba1\u7b97\u3002 IF\uff08\uff09\u51fd\u6570\u5c06CONTAINS\uff08\uff09\u7684\u5e03\u5c14\u7ed3\u679c\u8f6c\u6362\u4e3a\u66f4\u6709\u7528\u7684\u663e\u793a\u7ed9\u7528\u6237\u7684\u6587\u672c\u3002\u540c\u6837\uff0c\u7b2c\u4e8c\u4e2a\u8868\u8fbe\u5f0f\u5728\u672c\u6708\u4e0a\u534a\u6708\u663e\u793a\u4e00\u6761\u6d88\u606f\uff0c\u5728\u672c\u6708\u4e0b\u534a\u6708\u663e\u793a\u53e6\u4e00\u6761\u6d88\u606f\u3002<\/p><\/div>\n<\/li>\n<li class=\"li step\">\u5220\u9664\u6240\u6709\u7684\u6d4b\u8bd5\u8868\u8fbe\u5f0f\uff0c\u53ea\u7559\u4e0b\u4f7f\u7528$ User\u5168\u5c40\u53d8\u91cf\u7684\u884c\u3002\n<div class=\"itemgroup info\">\u6362\u53e5\u8bdd\u8bf4\uff0c\u56de\u5230\u8fd9\u4e2a\u9875\u9762\u3002<\/p>\n<div class=\"codeblock\">\n<pre class=\"line-numbers code-toolbar language-java\"><code class=\"  language-java\"><span class=\"token operator\">&lt;<\/span>apex<span class=\"token operator\">:<\/span>page<span class=\"token operator\">&gt;<\/span>\n    \n    <span class=\"token operator\">&lt;<\/span>apex<span class=\"token operator\">:<\/span>pageBlock title<span class=\"token operator\">=<\/span><span class=\"token string\">\"User Status\"<\/span><span class=\"token operator\">&gt;<\/span>\n        <span class=\"token operator\">&lt;<\/span>apex<span class=\"token operator\">:<\/span>pageBlockSection columns<span class=\"token operator\">=<\/span><span class=\"token string\">\"1\"<\/span><span class=\"token operator\">&gt;<\/span>\n            \n            <span class=\"token punctuation\">{<\/span><span class=\"token operator\">!<\/span> $User<span class=\"token punctuation\">.<\/span>FirstName <span class=\"token operator\">&amp;<\/span> <span class=\"token string\">' '<\/span> <span class=\"token operator\">&amp;<\/span> $User<span class=\"token punctuation\">.<\/span>LastName <span class=\"token punctuation\">}<\/span> \n           <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span><span class=\"token operator\">!<\/span> $User<span class=\"token punctuation\">.<\/span>Username <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span>\n            \n        <span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>apex<span class=\"token operator\">:<\/span>pageBlockSection<span class=\"token operator\">&gt;<\/span>\n    <span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>apex<span class=\"token operator\">:<\/span>pageBlock<span class=\"token operator\">&gt;<\/span>\n    \n<span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>apex<span class=\"token operator\">:<\/span>page<span class=\"token operator\">&gt;<\/span><\/code><\/pre>\n<\/div>\n<\/div>\n<div class=\"itemgroup stepresult\">\u8ba9\u6211\u4eec\u4f7f\u7528\u6761\u4ef6\u8868\u8fbe\u5f0f\u6765\u505a\u4e00\u4e9b\u66f4\u6709\u7528\u7684\u4e8b\u60c5\u3002<\/div>\n<\/li>\n<li class=\"li step\">\u7528\u4ee5\u4e0b\u4ee3\u7801\u66ff\u6362$ User.Username\u8868\u8fbe\u5f0f\u7684\u884c\u3002\n<div class=\"itemgroup info\">\n<div class=\"codeblock\">\n<pre class=\"line-numbers code-toolbar language-java\"><code class=\"  language-java\"><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span><span class=\"token operator\">!<\/span> <span class=\"token function\">IF<\/span><span class=\"token punctuation\">(<\/span>$User<span class=\"token punctuation\">.<\/span>isActive<span class=\"token punctuation\">,<\/span> $User<span class=\"token punctuation\">.<\/span>Username<span class=\"token punctuation\">,<\/span> <span class=\"token string\">'inactive'<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span>\n<\/code><\/pre>\n<\/div>\n<\/div>\n<div class=\"itemgroup stepresult\">isActive\u662f$ User\u5168\u5c40\u53d8\u91cf\u4e0a\u53ef\u7528\u7684\u53e6\u4e00\u4e2a\u5b57\u6bb5\u3002\u8fd9\u662f\u4e00\u4e2a\u5e03\u5c14\u5b57\u6bb5\uff0c\u5982\u679c\u7528\u6237\u5904\u4e8e\u6d3b\u52a8\u72b6\u6001\uff0c\u5219\u4e3atrue;\u5982\u679c\u5df2\u505c\u7528\uff0c\u5219\u4e3afalse\u3002\u73b0\u5728\uff0c\u201c\u7528\u6237\u72b6\u6001\u201d\u9762\u677f\u5c06\u663e\u793a\u7528\u6237\u7684\u7528\u6237\u540d\uff08\u5982\u679c\u5b83\u4eec\u5904\u4e8e\u6d3b\u52a8\u72b6\u6001\uff09\uff0c\u5982\u679c\u4e0d\u662f\uff0c\u5219\u663e\u793a\u201c\u4e0d\u6d3b\u52a8\u201d\uff08inactive\uff09\u3002<\/div>\n<\/li>\n<\/ol>\n<\/div>\n<\/div>\n<div id=\"visualforce_variables_expressions_tell_me_more\" class=\"topic concept nested0\" lang=\"en-us\" xml:lang=\"en-us\">\n<h2 id=\"Tdxn4tBK-heading6\" class=\"helpHead2\"><span id=\"topic-title\" class=\"ph\">\u544a\u8bc9\u6211\u66f4\u591a&#8230;<\/span><\/h2>\n<div class=\"body conbody\">\n<div class=\"shortdesc\">\n<p>\u5728Visualforce\u8868\u8fbe\u5f0f\u4e2d\u53ef\u4ee5\u4f7f\u7528\u8bb8\u591a\u5168\u5c40\u53d8\u91cf\u548c\u51fd\u6570\u3002<br \/>\nVisualforce\u4e2d\u53ef\u4ee5\u4f7f\u7528\u8fd1\u4e8c\u5341\u4e2a\u5168\u5c40\u53d8\u91cf\u3002\u5982\u60a8\u6240\u89c1\uff0c\u5b83\u4eec\u5bf9\u4e8e\u83b7\u53d6\u6709\u5173\u5f53\u524d\u767b\u5f55\u7528\u6237\u7684\u4fe1\u606f\u975e\u5e38\u6709\u7528\uff0c\u4f46\u4e5f\u53ef\u7528\u4e8e\u83b7\u53d6\u6709\u5173\u7ec4\u7ec7\uff08$ Organization\uff09\uff0c\u8bbe\u7f6e\uff08$ Setup\uff09\uff0c\u6709\u5173\u81ea\u5b9a\u4e49\u5bf9\u8c61\u7684\u8be6\u7ec6\u4fe1\u606f\uff08$ ObjectType\uff09\u7684\u8be6\u7ec6\u4fe1\u606f\uff0c\u5bf9\u8c61\uff08$ Action\uff09\u7b49\u7b49\u3002\u8bf7\u53c2\u9605Visualforce\u5168\u5c40\u53d8\u91cf\u53c2\u8003\u3002<\/p>\n<p>\u540c\u6837\uff0c\u5728Visualforce\u4e2d\u53ef\u4ee5\u4f7f\u7528\u51e0\u5341\u4e2a\u51fd\u6570\u3002\u8be5\u5217\u8868\u4e0e\u516c\u5f0f\u5b57\u6bb5\u4e2d\u7684\u53ef\u7528\u529f\u80fd\u7c7b\u4f3c\uff0c\u4f46\u4e0d\u5b8c\u5168\u76f8\u540c\u3002\u5728\u5b83\u4eec\u91cd\u53e0\u7684\u5730\u65b9\uff0c\u51fd\u6570\u7684\u884c\u4e3a\u662f\u76f8\u540c\u7684\uff0c\u6240\u4ee5\u5728\u7f16\u5199Visualforce\u8868\u8fbe\u5f0f\u65f6\uff0c\u53ef\u4ee5\u91cd\u590d\u4f7f\u7528\u5927\u90e8\u5206\u5173\u4e8e\u516c\u5f0f\u5b57\u6bb5\u7684\u77e5\u8bc6\u3002\u8bf7\u53c2\u9605Visualforce\u51fd\u6570\u53c2\u8003\u4ee5\u83b7\u53d6\u5b8c\u6574\u5217\u8868\u3002<\/p>\n<p>\u8868\u8fbe\u5f0f\u6709\u8bb8\u591a\u7528\u9014\uff0c\u5e38\u5e38\u7528\u4e8e\u4e3aVisualforce\u7ec4\u4ef6\u4e0a\u7684\u5c5e\u6027\u63d0\u4f9b\u503c\u3002<\/p>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u5b66\u4e60\u76ee\u6807 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