Question

我使用下面的正则表达式替换两个单词之间的文本。它有效，除了它跳过其中一些。贴在下面是一个例子。

var EditedHtml = Regex.Replace(htmlText, @"<script(.*?)</script>", "");

htmlText：

 <head>
   <script src=" https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js" type="text/javascript"></script>
   <script src=" https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.18/jquery-ui.min.js" type="text/javascript"></script>
   <script src="/AspellWeb/v2/js/dragiframe.js" type="text/javascript"></script>
   <script type="text/javascript">
     var applicationName = '/';
     FullPath = (applicationName.length > 1) ? 'http://localhost:65355' + applicationName : 'http://localhost:65355';
     //FullPath = 'http://localhost:65355';
     GetPath = function (url) {
     return FullPath + url;
   }
   </script>

   <script type="text/javascript" src="../../Scripts/stats.js?"></script>
</head>

<body>
  .......
  <script type="text/javascript">
    function loadAndInit() {

    $(".dvloading").hide();
    if ($.browser.mozilla) {
      if (location.pathname == "/Stats/Reports") {            // This is for local env.
        $("#prntCss").attr("href", "../../../Content/SitePrint_FF.css");
      }
      else {                                                  // This is for DEV/QA/STAGE/PROD env. 
        $("#prntCss").attr("href", "../../Content/SitePrint_FF.css");
      }
    }

  }
  </script>
</body>

EditedHtml：

<head>
  <script type="text/javascript">
    var applicationName = '/';
    FullPath = (applicationName.length > 1) ? 'http://localhost:65355' + applicationName : 'http://localhost:65355';
    //FullPath = 'http://localhost:65355';
    GetPath = function (url) {
      return FullPath + url;
    }
  </script>
</head>

<body>
  .......
  <script type="text/javascript">
    function loadAndInit() {

      $(".dvloading").hide();
      if ($.browser.mozilla) {
        if (location.pathname == "/Stats/Reports") {            // This is for local env.
          $("#prntCss").attr("href", "../../../Content/SitePrint_FF.css");
        }
        else {                                                  // This is for DEV/QA/STAGE/PROD env. 
          $("#prntCss").attr("href", "../../Content/SitePrint_FF.css");
        }
      }

    }
  </script>
</body>

Answer 1

为什么使用Regex来解析html。见this

使用像HtmlAgilityPack

这样的真实html解析器要容易得多

HtmlAgilityPack.HtmlDocument doc = new HtmlAgilityPack.HtmlDocument();
doc.Load(filename); //or doc.LoadHtml(HtmlString)

doc.DocumentNode.Descendants()
    .Where(n => n.Name == "script").ToList()
    .ForEach(s => s.Remove());

StringWriter wr = new StringWriter();
doc.Save(wr);
var newhtml = wr.ToString();

Answer 2

在single line mode中尝试：

var EditedHtml = Regex.Replace(
    htmlText, @"<script(.*?)</script>", "", 
    RegexOptions.Singleline);

文档引用：

指定单行模式。更改点（。）的含义，使其匹配每个字符（而不是除\ n之外的每个字符）。

Answer 3

尝试

var EditedHtml = Regex.Replace(
    htmlText, @"<script(.*?)</script>", "", RegexOptions.Singleline
);

使用单线模式，以便.匹配任何字符，包括换行符。

Answer 4

试试这个：

//(.|\r\n)*: matches every character and/or newline zero or more times
//(.|\r\n)*?: as few times as possible == > you get rid of <script> tags and of their content but you keep the rest of your html
var EditedHtml = Regex.Replace(htmlText, @"<script (.|\r\n)*?</script>", "");

希望有所帮助

参考文献： http://msdn.microsoft.com/en-us/library/az24scfc.aspx

正则表达式替换不会替换所有出现的事件

4 个答案: