我需要提取兩個標簽之間的文本<mail>和</mail>
這是文本
<?xml version='1.0' encoding='utf-16'?>
<li xmlns:xsd='http://www.w3.org/2001/XMLSchema' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'>
<g id='{E5EABB1F-40BC-45BB-8D87-3B6C239B521B}' displayName='Actions' onclick='javascript:return scForm.postEvent(this,event,'forms:addaction')'>
<li id='{D4502A11-9417-4479-9F2A-485F45D2E2D0}' unicid='B048F2B1C5964A1CB64AEEE249C00371'>
<parameters><host>smtp.sendgrid.net</host><port>587</port><login>[email protected]</login><password>n8vhr^^mcQE4</password><from>[email protected]</from><isbodyhtml>true</isbodyhtml><to>[{CC59436D-F6A6-4B84-A490-7A6F6ACDF8C9}]</to><cc></cc><bcc></bcc><localfrom>[email protected]</localfrom><subject>[{5A297C9C-4979-49C5-BDE6-F6F5351DF7AA}], thank you for registering for site Community Updates</subject><mail>
<table width='100%' border='0' cellspacing='0' cellpadding='0' class='em_full_wrap' style='background-color: #efefef;'>
<tbody>
<tr>
<td align='center' valign='top'>
<table align='center' width='700' border='0' cellspacing='0' cellpadding='0' class='em_main_table' style='width: 700px; table-layout: fixed; background-color: #efefef;'>
<tbody>
<tr>
<td align='center' valign='middle' class='em_space' style='font-family:Arial, sans-serif; font-size:12px; line-height:15px; color:#000000; padding:23px 10px;'><span class='em_defaultlink'><a href='%%view_email_url%%' target='_blank' style='text-decoration:none; color:#000000;'>View this email online.</a></span></td>
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</td>
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<tr>
<td align='center' valign='top'>
<table width='100%' border='0' cellspacing='0' cellpadding='0' align='center'>
<tbody>
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<td align='center' valign='top'>
<table cellpadding='0' cellspacing='0' width='100%' role='presentation' style='min-width: 100%;' class='stylingblock-content-wrapper'>
<tbody>
<tr>
<td class='stylingblock-content-wrapper camarker-inner'><!--BLOCK 01- LOGO-->
<table align='center' border='0' cellpadding='0' cellspacing='0' width='100%'>
<tbody>
<tr>
<td align='center' valign='top'>
<table align='center' border='0' cellpadding='0' cellspacing='0' class='em_main_table' style='width: 700px; background-color: #3e2246;' width='700'>
<tbody>
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<td align='center' class='em_full_img' style='padding-top: 0px;' valign='top'>
<a conversion='false' data-linkto='https://' href='https://site.test.com/' style='text-decoration:none;' target='_blank'><img alt='site by test' data-assetid='165573' height='182' src='https://image.e.residential.test.com/lib/fe3815707564067c721d73/m/13/new-logo_image.jpg' style='display: block; font-family: Arial, sans-serif; font-size: 24px; line-height: 30px; color: #FFFFFF; max-width: 700px; padding: 0px; text-align: center; height: 182px; width: 700px;' width='700'></a></td>
</tr>
</tbody>
</table>
</td>
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</tbody>
</table>
<!--//BLOCK 01- LOGO--></td>
</tr>
</tbody>
</table>
<table cellpadding='0' cellspacing='0' width='100%' role='presentation' style='min-width: 100%;' class='stylingblock-content-wrapper'>
<tbody>
<tr>
<td class='stylingblock-content-wrapper camarker-inner'><!--BLOCK 03 - HERO-->
<table align='center' border='0' cellpadding='0' cellspacing='0' width='100%'>
<tbody>
<tr>
<td align='center' valign='top'>
<table align='center' border='0' cellpadding='0' cellspacing='0' class='em_main_table' style='width: 700px; table-layout: fixed; background-color: #ffffff;' width='700'>
<tbody>
<tr>
<td align='center' class='em_full_img' valign='top'>
<img alt='' class='em_g_img' height='400' src='https://image.e.residential.test.com/lib/fe3815707564067c721d73/m/12/g_banner_image.jpg' style='display: block; font-family: Arial, sans-serif; font-size: 18px; line-height: 30px; color: #424242; max-width: 700px; border-width: 0px; border-style: solid;' width='700'></td>
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</td>
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<!--//BLOCK 03 - HERO--></td>
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<table cellpadding='0' cellspacing='0' width='100%' role='presentation' style='min-width: 100%;' class='stylingblock-content-wrapper'>
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<td class='stylingblock-content-wrapper camarker-inner'><!--BLOCK 04 - SUBHEAD-->
<table align='center' border='0' cellpadding='0' cellspacing='0' width='100%'>
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<td align='center' valign='top'>
<table align='center' border='0' cellpadding='0' cellspacing='0' class='em_main_table' style='width: 700px; table-layout: fixed; background-color: #3e2246;' width='700'>
<tbody>
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<td align='center' class='em_aside15 em_ptop' style='padding:30px 40px 0px 50px;' valign='top'>
<table align='center' border='0' cellpadding='0' cellspacing='0' width='100%'>
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<td class='em_font40' style='font-family: Georgia, 'Times New Roman', serif; font-size: 31px; line-height: 40px; color: #ff7f00; text-align: center;' valign='top'>
Thank you for registering for site Community Updates
<table align='center' border='0' cellpadding='0' cellspacing='0' width='100%'>
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<td style='font-family: Arial, sans-serif; font-size: 15px; line-height: 20px; color: #ffffff; text-align: center;' valign='top'>
<br>
<strong>Welcome to site. You have now been added to the site community database.</strong></td>
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<!--//BLOCK 04 - SUBHEAD--></td>
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<table cellpadding='0' cellspacing='0' width='100%' role='presentation' style='min-width: 100%;' class='stylingblock-content-wrapper'>
<tbody>
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<td class='stylingblock-content-wrapper camarker-inner'><!--BLOCK 27 - COMMUNITY-->
<table align='center' border='0' cellpadding='0' cellspacing='0' width='100%'>
<tbody>
<tr>
<td align='center' valign='top'>
<table align='center' border='0' cellpadding='0' cellspacing='0' class='em_main_table' style='width:700px; table-layout:fixed;' width='700'>
<tbody>
<tr>
<td align='center' style='background-color:#3e2246;' valign='top'>
<table align='center' border='0' cellpadding='0' cellspacing='0' class='em_wrapper' style='width:700px;' width='700'>
<tbody>
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<td class='em_h20' style='height:50px; font-size:1px;line-height:1px;'>
<img alt='' height='1' src='http://image.e.residential.test.com/lib/fe3815707564067c721d73/m/1/a06c1dac-d3ac-4c97-a8fe-f5145ca2811c.gif' style='display: block; border-width: 0px; border-style: solid;' width='1'></td>
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<tr>
<td align='center' class='em_aside15' valign='top'>
<table border='0' cellpadding='0' cellspacing='0' class='em_wrapper' dir='rtl' style='width:600px;' width='600'>
<tbody>
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<td valign='top'>
<table align='right' border='0' cellpadding='0' cellspacing='0' class='em_wrapper' dir='ltr' style='width:300px;' width='300'>
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<td align='center' class='em_full_img' valign='top'>
<img alt='site by test' class='em_g_img' height='176' src='https://image.e.residential.test.com/lib/fe3815707564067c721d73/m/12/image_300x176.jpg' style='display: block; max-width: 300px; font-family: Arial, sans-serif; font-size: 20px; font-weight: bold; color: #ffffff; border-width: 0px; border-style: solid;' width='300'></td>
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</table>
<!--[if gte mso 9]></td><td valign='top'><![endif]-->
<table align='left' border='0' cellpadding='0' cellspacing='0' class='em_wrapper' dir='ltr' style='width:299px;' width='299'>
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<td valign='top'>
<table align='center' border='0' cellpadding='0' cellspacing='0' class='em_wrapper' style='width:299px;' width='299'>
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<td align='center' valign='top'>
<table align='left' border='0' cellpadding='0' cellspacing='0' class='em_wrapper' style='width:299px;' width='299'>
<tbody>
<tr>
<td align='center' class='em_ptop' valign='top'>
<table align='left' border='0' cellpadding='0' cellspacing='0' class='em_wrapper' style='width:270px;' width='270'>
<tbody>
<tr>
<td align='left' class='em_center' style='color:#ff7f00; font-size:26px; line-height:32px; font-family: Georgia,'Times New Roman', serif;' valign='top'>
<span class='em_defaultlink'>KEEP UP TO DATE</span></td>
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<tr>
<td class='em_h20' style='line-height: 1px;font-size:1px; height:18px;'>
<img alt='' height='1' src='http://image.e.residential.test.com/lib/fe3815707564067c721d73/m/1/a06c1dac-d3ac-4c97-a8fe-f5145ca2811c.gif' style='display: block; border-width: 0px; border-style: solid;' width='1'></td>
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<tr>
<td align='left' class='em_center' style='font-size: 14px; line-height: 18px; font-family: Arial, sans-serif; color:#ffffff;' valign='top'>
<span class='em_defaultlink'>Find out more about site’s fantastic community events and news ongoing stories. </span></td>
</tr>
<tr>
<td class='em_h20' style='line-height: 1px; font-size:1px; height:32px;'>
<img alt='' height='1' src='http://image.e.residential.test.com/lib/fe3815707564067c721d73/m/1/a06c1dac-d3ac-4c97-a8fe-f5145ca2811c.gif' style='display: block; border-width: 0px; border-style: solid;' width='1'></td>
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<td align='left' valign='top'>
<table align='left' border='0' cellpadding='0' cellspacing='0' class='em_wrapper'>
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<td align='center' valign='top'>
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<td class='em_hide' style='width:29px;'>
<img alt='' height='1' src='http://image.e.residential.test.com/lib/fe3815707564067c721d73/m/1/a06c1dac-d3ac-4c97-a8fe-f5145ca2811c.gif' style='display: block; border-width: 0px; border-style: solid;' width='1'></td>
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<td class='em_h20' style='height:50px; font-size:1px;line-height:1px;'>
<img alt='' height='1' src='http://image.e.residential.test.com/lib/fe3815707564067c721d73/m/1/a06c1dac-d3ac-4c97-a8fe-f5145ca2811c.gif' style='display: block; border-width: 0px; border-style: solid;' width='1'></td>
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</td>
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</td>
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<!--//BLOCK 27 - COMMUNITY--></td>
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<custom name='opencounter' type='tracking'>
</custom>
</mail><localized></localized></parameters>
</li>
<li id='{31602921-2C7A-42F0-ABFE-58740B47DBF1}' unicid='FD74B915782841298684DA49A56FD568'>
<parameters />
</li>
</g>
</li>
我寫了以下函式
Function Get-StringBetweenStartEnd {
Param($Text,$Start,$End)
$Regex = [Regex]::new("(?<=" $Start ")(.*)(?=" $End ")")
$Match = $Regex.Match($String)
if($Match.Success) { Return $Match.Value}else{Return ""}
}
$Result = Get-StringBetweenStartEnd -Text $strInput -Start "<mail>" -End "</mail>"
write-host $Result.Trim()
該值始終為空。
任何建議將不勝感激。提前致謝
uj5u.com熱心網友回復：
默認情況下，.模式不匹配多行。
啟用單行模式以更改其行為：
更改點 (.) 的含義，使其匹配每個字符（而不是除 \n 之外的每個字符）。
有兩種方法可以做到：
通過指定行內選項
s：[Regex]::Match( $text, '(?s)<mail>(.*)</mail>' ).Groups.Value通過傳遞
RegexOptions.Singleline給Regex.Match方法：[Regex]::Match( $text, '<mail>(.*)</mail>', [Text.RegularExpressions.RegexOptions]::Singleline ).Groups.Value
我冒昧地通過將lookbehind/lookahead斷言更改為簡單的模式來簡化您的RegEx。在這種情況下，使用組來提取值更簡單。
請注意，靜態[Regex]::Match()方法可以更快，因為它保留了已編譯正則運算式的快取，因此當多次使用同一個 RegEx（例如在回圈中）時，不必再次解釋 RegEx。
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