代码高亮工具CodeHighlighter 使用配置

　　CodeHighlighter 是一款基于.NET平台的优秀的代码高亮工具，相比Syntaxhighlight，后者是在页面运行时，由javascript对代码进行高亮处理，如果代码量很多时有可能会有点卡，且每加次都须重新处理，而CodeHighlighter 会在后台直接生成HTML，不依赖javascript与css，使用更加方便！

　　当然，凡事有利必有弊，在灵活性上CodeHighlighter 略差，本文在此不对此做优劣评比，仅分享如何配置使用CodeHighlighter ！

　　首先：我们必须下载CodeHighlighter ，它的最新版本，我们可以在http://www.actiprosoftware.com/Products/DotNet/ASPNET/CodeHighlighter/Default.aspx　下载得到！

　　第二步：将下载的文件包解压，把　“

ActiproSoftware.Shared.Net20.dll
ActiproSoftware.CodeHighlighter.Net20.dll
CodeHighlighterTest.dll

　　”　三个DLL文件引用到Bin目录下，然后将整个Languages文件夹拷贝到网站根目录！

　　第三步：打开Web.Config，在configurations节点下增加如下配置：

 1   <configSections>
 2     <section name="codeHighlighter" requirePermission="false" type="ActiproSoftware.CodeHighlighter.CodeHighlighterConfigurationSectionHandler, ActiproSoftware.CodeHighlighter.Net20"/>
 3   </configSections>
 4 
 5   <codeHighlighter>
 6     <cache languageTimeout="3"/>
 7     <keywordLinking enabled="true" target="_blank" defaultKeywordCollectionKey="ActiproKeywords">
 8       <keywordCollection key="ActiproKeywords">
 9         <explicitKeyword tokenKey="IdentifierToken" patternValue="Actipro" url="http://www.actiprosoftware.com" caseSensitive="false"/>
10         <explicitKeyword tokenKey="IdentifierToken" patternValue="CodeHighlighter" url="http://www.codehighlighter.com" caseSensitive="false"/>
11       </keywordCollection>
12     </keywordLinking>
13     <languages>
14       <language key="Assembly" definitionPath="~/Languages/Lexers/ActiproSoftware.Assembly.xml"/>
15       <language key="BatchFile" definitionPath="~/Languages/Lexers/ActiproSoftware.BatchFile.xml"/>
16       <language key="C#" definitionPath="~/Languages/Lexers/ActiproSoftware.CSharp.xml"/>
17       <language key="CSS" definitionPath="~/Languages/Lexers/ActiproSoftware.CSS.xml"/>
18       <language key="HTML" definitionPath="~/Languages/Lexers/ActiproSoftware.HTML.xml"/>
19       <language key="INIFile" definitionPath="~/Languages/Lexers/ActiproSoftware.INIFile.xml"/>
20       <language key="Java" definitionPath="~/Languages/Lexers/ActiproSoftware.Java.xml"/>
21       <language key="JScript" definitionPath="~/Languages/Lexers/ActiproSoftware.JScript.xml"/>
22       <language key="Lua" definitionPath="~/Languages/Lexers/ActiproSoftware.Lua.xml"/>
23       <language key="MSIL" definitionPath="~/Languages/Lexers/ActiproSoftware.MSIL.xml"/>
24       <language key="Pascal" definitionPath="~/Languages/Lexers/ActiproSoftware.Pascal.xml"/>
25       <language key="Perl" definitionPath="~/Languages/Lexers/ActiproSoftware.Perl.xml"/>
26       <language key="PHP" definitionPath="~/Languages/Lexers/ActiproSoftware.PHP.xml"/>
27       <language key="PowerShell" definitionPath="~/Languages/Lexers/ActiproSoftware.PowerShell.xml"/>
28       <language key="Python" definitionPath="~/Languages/Lexers/ActiproSoftware.Python.xml"/>
29       <language key="SQL" definitionPath="~/Languages/Lexers/ActiproSoftware.SQL.xml"/>
30       <language key="VB.NET" definitionPath="~/Languages/Lexers/ActiproSoftware.VBDotNet.xml"/>
31       <language key="VBScript" definitionPath="~/Languages/Lexers/ActiproSoftware.VBScript.xml"/>
32       <language key="XAML" definitionPath="~/Languages/Lexers/ActiproSoftware.XAML.xml"/>
33       <language key="XML" definitionPath="~/Languages/Lexers/ActiproSoftware.XML.xml"/>
34     </languages>
35     <lineNumberMargin foreColor="Teal" paddingCharacter=" " visible="true"/>
36     <outlining enabled="true" imagesPath="~/Images/OutliningIndicators/"/>
37     <spacesInTabs count="4"/>
38   </codeHighlighter>

　　第四步：配置完成，然后直接在后台对代码进行高亮即可：

 1         protected void Page_Load(object sender, EventArgs e)
 2         {
 3             string code = "代码";//待高亮的代码
 4             string language = "语言";//支持c#，html,sql,css,php,msil,python,perl,javascript 等，具体见web.config 的languages配置
 5             bool isShowLineNum = false;//是否显示行号
 6             Response.Write("<pre>");
 7             Response.Write(GeneralCodeHighlight(code, language, isShowLineNum));
 8             Response.Write("</pre>");
 9             Response.End();
10         }
11 
12         public string GeneralCodeHighlight(string code, string languageKey, bool isShowLineNum)
13         {
14 
15             SyntaxLanguage lang = null;
16             //尝试从缓存获取配置节
17             CodeHighlighterConfiguration config = HttpContext.Current.Cache["CodeHighlighterConfig"] as CodeHighlighterConfiguration;
18             if (config == null)
19             {
20                 //缓存不存在，重新从 web.config 获取并保存缓存
21                 config = (CodeHighlighterConfiguration)ConfigurationManager.GetSection("codeHighlighter");
22                 HttpContext.Current.Cache.Insert("CodeHighlighterConfig", config);
23             }
24             //获取语言
25             foreach (string key in config.LanguageConfigs.Keys)
26             {
27                 if (key.ToLower() == languageKey.ToLower())
28                 {
29                     lang = CodeHighlighter.GetLanguage(config, key);
30                     break;
31                 }
32             }
33             //不明语言，不理会返回
34             if (lang == null)
35                 return code;
36             CodeHighlighterEngine engine = new CodeHighlighterEngine();
37             engine.OutliningEnabled = false;
38             engine.LineNumberMarginVisible = isShowLineNum;
39             return engine.GenerateHtmlInline(string.Empty, code, lang);
40         }