正则表达式未从 Html 字符串中删除内联 css [重复]答案

【问题标题】：Regex expression not removing inline css from Html String [duplicate]正则表达式未从 Html 字符串中删除内联 css [重复]
【发布时间】：2017-04-18 23:31:06
【问题描述】：

背景

目前有一个控制台应用程序从 0365 Outlook 帐户获取电子邮件，我正在使用 Outlook api 2.0

问题

我正在使用 api 访问电子邮件的正文，但是正文以 html 字符串的形式出现。我正在使用我的 go to regex 功能来删除 html 标签，但是 Outlook 在他们的 Html 中添加了一个 css 类，这基本上使我的 regex 表达式过时了。

代码

string body = "<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta content="text/html; charset=us-ascii">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<style>
<!--
@font-face
    {font-family:"Cambria Math"}
@font-face
    {font-family:Calibri}
p.MsoNormal, li.MsoNormal, div.MsoNormal
    {margin:0in;
    margin-bottom:.0001pt;
    font-size:11.0pt;
    font-family:"Calibri",sans-serif}
a:link, span.MsoHyperlink
    {color:#0563C1;
    text-decoration:underline}
a:visited, span.MsoHyperlinkFollowed
    {color:#954F72;
    text-decoration:underline}
span.EmailStyle17
    {font-family:"Calibri",sans-serif;
    color:windowtext}
.MsoChpDefault
    {font-family:"Calibri",sans-serif}
@page WordSection1
    {margin:1.0in 1.0in 1.0in 1.0in}
div.WordSection1
    {}
-->
</style>
</head>
<body lang="EN-US" link="#0563C1" vlink="#954F72">
<div class="WordSection1">
<p class="MsoNormal">&nbsp;</p>
</div>
<hr>
<p><b>Confidentiality Notice:</b> This e-mail is intended only for the addressee named above. It contains information that is privileged, confidential or otherwise protected from use and disclosure. If you are not the intended recipient, you are hereby notified
 that any review, disclosure, copying, or dissemination of this transmission, or taking of any action in reliance on its contents, or other use is strictly prohibited. If you have received this transmission in error, please reply to the sender listed above
 immediately and permanently delete this message from your inbox. Thank you for your cooperation.</p>
</body>
</html>
";
string viewString1 = Regex.Replace(body, "<.*?>", string.Empty);
string viewString12 = viewString1.Replace("&nbsp;", string.Empty);

我的正则表达式的结果

<!--
@font-face
    {font-family:"Cambria Math"}
@font-face
    {font-family:Calibri}
p.MsoNormal, li.MsoNormal, div.MsoNormal
    {margin:0in;
    margin-bottom:.0001pt;
    font-size:11.0pt;
    font-family:"Calibri",sans-serif}
a:link, span.MsoHyperlink
    {color:#0563C1;
    text-decoration:underline}
a:visited, span.MsoHyperlinkFollowed
    {color:#954F72;
    text-decoration:underline}
span.EmailStyle17
    {font-family:"Calibri",sans-serif;
    color:windowtext}
.MsoChpDefault
    {font-family:"Calibri",sans-serif}
@page WordSection1
    {margin:1.0in 1.0in 1.0in 1.0in}
div.WordSection1
    {}
-->







Confidentiality Notice: This e-mail is intended only for the addressee named above. It contains information that is privileged, confidential or otherwise protected from use and disclosure. If you are not the intended recipient, you are hereby notified
 that any review, disclosure, copying, or dissemination of this transmission, or taking of any action in reliance on its contents, or other use is strictly prohibited. If you have received this transmission in error, please reply to the sender listed above
 immediately and permanently delete this message from your inbox. Thank you for your cooperation.

目标

我需要能够从字符串中去除 html 标记，并删除 Outlook 放置在正文中的 css 类。

【问题讨论】：

顺便说一句，你可能要考虑更换对于一个空白（白色）空间，这就是它所代表的（不是空的）。

标签： c# regex outlook-api

【解决方案1】：

您可以将String.Empty 替换为regex option Singleline^{（这使得. 匹配新行）}：

string viewString1 = Regex.Replace(body, "<.*?>", string.Empty, RegexOptions.Singleline);

【讨论】：