今天研究了下VS在读取低版本项目时对其进行升级的迁移报告“UpgradeLog.XML”，这个报告是一个XML文件，但是加载了一个XSLT文件“UpgradeReport.xslt”。这个XSLT文件除了用于逻辑计算的部分外，还包含了一些javascript代码，并引用了一个CSS文件“UpgradeReport.css”用来配置样式。
于是我照猫画虎，用XSLT实现了一个简易版的XML日志统计界面，只实现了统计各类日志的功能。
“LogList.xml”的内容如下：
<?xml version="1.0" encoding="gb2312"?> <?xml-stylesheet type='text/xsl' href='Resources/LogList.xslt'?> <!--LogLevel:事件等级0-3，LogItem:报警项，LogTime:发生时间，Description:报警信息--> <LogList> <Log LogLevel="0" LogItem="Zhang" Description="PERFECT1"/> <Log LogLevel="0" LogItem="Zhang" Description="PERFECT2"/> <Log LogLevel="1" LogItem="Zhang" Description="INFO1"/> <Log LogLevel="1" LogItem="Zhang" Description="INFO2"/> <Log LogLevel="1" LogItem="Zhang" Description="INFO3"/> <Log LogLevel="2" LogItem="Zhang" Description="WARNING1"/> <Log LogLevel="3" LogItem="Zhang" Description="ERROR1"/> <Log LogLevel="3" LogItem="Zhang" Description="ERROR2"/> <Log LogLevel="3" LogItem="Zhang" Description="ERROR3"/> <Log LogLevel="3" LogItem="Zhang" Description="ERROR4"/> <Log LogLevel="0" LogItem="Lee" Description="PERFECT1"/> <Log LogLevel="0" LogItem="Lee" Description="PERFECT2"/> <Log LogLevel="1" LogItem="Wang" Description="INFO1"/> <Log LogLevel="1" LogItem="Wang" Description="INFO2"/> <Log LogLevel="2" LogItem="Wang" Description="WARNING1"/> <Log LogLevel="1" LogItem="Zhao" Description="INFO1"/> </LogList>
根节点LogList下，有多个Log标签，LogLevel从0到3分别代表“正常”、“信息”、“警告”、“错误”，LogItem是一个标识，同一个LogItem的日志统计到一起，Description是一个对单条日志的描述，在统计中没有实际意义。
1）正常：0_PERFECT.png
2）信息：1_INFO.png
3）警告：2_WARNING.png
4）错误：3_ERROR.png
然后创建一个XSLT文件，取名“LogList.xslt”：
<?xml version="1.0" encoding="gb2312"?> <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:msxsl="urn:schemas-microsoft-com:xslt"> <!-- Keys --> <xsl:key name="LogItemKey" match="Log" use="@LogItem"/> <!-- Intermediate Templates --> <xsl:template match="LogList" mode="logoverviewXML"> <LogItems> <xsl:for-each select="Log[generate-id(.) = generate-id(key('LogItemKey',@LogItem))]"> <LogItem> <xsl:variable name="pNode" select="current()"/> <xsl:variable name="errorCount" select="count(../Log[@LogItem = current()/@LogItem and @LogLevel=3])"/> <xsl:variable name="warningCount" select="count(../Log[@LogItem = current()/@LogItem and @LogLevel=2])"/> <xsl:variable name="infoCount" select="count(../Log[@LogItem = current()/@LogItem and @LogLevel=1])"/> <xsl:variable name="perfectCount" select="count(../Log[@LogItem = current()/@LogItem and @LogLevel=0])"/> <xsl:attribute name="Status"> <xsl:choose> <xsl:when test="$errorCount > 0">Error</xsl:when> <xsl:when test="$warningCount > 0">Warning</xsl:when> <xsl:when test="$infoCount > 0">Info</xsl:when> <xsl:when test="$perfectCount > 0">Perfect</xsl:when> <xsl:otherwise>Perfect</xsl:otherwise> </xsl:choose> </xsl:attribute> <xsl:attribute name="LogItem"> <xsl:value-of select="@LogItem"/> </xsl:attribute> <xsl:attribute name="ErrorCount"> <xsl:value-of select="$errorCount"/> </xsl:attribute> <xsl:attribute name="WarningCount"> <xsl:value-of select="$warningCount"/> </xsl:attribute> <xsl:attribute name="InfoCount"> <xsl:value-of select="$infoCount"/> </xsl:attribute> <xsl:attribute name="PerfectCount"> <xsl:value-of select="$perfectCount"/> </xsl:attribute> <xsl:attribute name="TotalCount"> <xsl:value-of select="$errorCount + $warningCount + $infoCount + $perfectCount"/> </xsl:attribute> </LogItem> </xsl:for-each> </LogItems> </xsl:template> <!-- LogItem Overview template --> <xsl:template match="LogItems" mode="logoverview"> <table> <tr> <th></th> <th>项目</th> <th>错误</th> <th>警告</th> <th>信息</th> <th>正常</th> </tr> <xsl:for-each select="LogItem"> <tr> <td> <img width="16" height="16"> <xsl:attribute name="src"> <xsl:choose> <xsl:when test="@Status = 'Error'">Resources\3_ERROR.png</xsl:when> <xsl:when test="@Status = 'Warning'">Resources\2_WARNING.png</xsl:when> <xsl:when test="@Status = 'Info'">Resources\1_INFO.png</xsl:when> <xsl:when test="@Status = 'Perfect'">Resources\0_PERFECT.png</xsl:when> </xsl:choose> </xsl:attribute> <xsl:attribute name="alt"> <xsl:value-of select="@Status"/> </xsl:attribute> </img> </td> <td> <xsl:value-of select="@LogItem"/> </td> <td class="textCentered"> <xsl:value-of select="@ErrorCount"/> </td> <td class="textCentered"> <xsl:value-of select="@WarningCount"/> </td> <td class="textCentered"> <xsl:value-of select="@InfoCount"/> </td> <td class="textCentered"> <xsl:value-of select="@PerfectCount"/> </td> </tr> </xsl:for-each> </table> </xsl:template> <!-- Document,matches "LogList" --> <xsl:template match="LogList"> <html> <head> <Meta content="en-us" http-equiv="Content-Language"/> <Meta content="text/html; charset=utf-16" http-equiv="Content-Type"/> <link type="text/css" rel="stylesheet" href="Resources\LogList.css"/> <title> 日志统计报告 </title> </head> <body> <h1> 日志统计报告 </h1> <div id="content"> <br/> <xsl:variable name="logoverview"> <xsl:apply-templates select="self::node()" mode="logoverviewXML"/> </xsl:variable> <div id="overview"> <xsl:apply-templates select="msxsl:node-set($logoverview)/*" mode="logoverview"/> </div> </div> </body> </html> </xsl:template> </xsl:stylesheet>
这个文件要引用一个样式表文件，创建“LogList.css”，也放到Resources目录下，代码如下：
/* Body style,for the entire document */
body
{
background: #F3F3F4;
color: #1E1E1F;
font-family: "Segoe UI",Tahoma,Geneva,Verdana,sans-serif;
padding: 0;
margin: 0;
}
/* Header1 style,used for the main title */
h1
{
padding: 10px 0px 10px 10px;
font-size: 21pt;
background-color: #E2E2E2;
border-bottom: 1px #C1C1C2 solid;
color: #201F20;
margin: 0;
font-weight: normal;
}
/* Table styles */
table
{
border-spacing: 0 0;
border-collapse: collapse;
font-size: 10pt;
}
table th
{
background: #E7E7E8;
text-align: left;
text-decoration: none;
font-weight: normal;
padding: 3px 6px 3px 6px;
}
table td
{
vertical-align: top;
padding: 3px 6px 5px 5px;
margin: 0px;
border: 1px solid #E7E7E8;
background: #F7F7F8;
}
/* Center text,used in the over views cells that contain message level counts */
.textCentered
{
text-align: center;
}
/* The message cells in message tables should take up all avaliable space */
.messageCell
{
width: 100%;
}
/* Padding around the content after the h1 */
#content
{
padding: 0px 12px 12px 12px;
}
（这个CSS文件删减自上面所说的UpgradeReport.css）
现在再双击文件“LogList.xml”，就可以在浏览器总看到下面的效果了：
附：本文中文件结构图
C:\Users\Tsybius\Desktop\XLST_Test | |-Resources | | | |-0_PERFECT.png | |-1_INFO.png | |-2_WARNING.png | |-3_ERROR.png | | | |-LogList.css | |-LogList.xslt | |-LogList.xml
END
原文链接：https://www.f2er.com/xml/297270.html