？？？***急求正则表达式***？？？

Question

我想将一段html代码中的<p>替换成<span>
但有个要求当<p></p>之间的文本不能以$$字符开头和以$$字符结尾，如何写这个正则表达式？
例如：
<p style='...'>lskfjwe中<span color='red'>lsjfklw</span>立刻就放松</p>
替换成
<span style='...'>lskfjwe中<span color='red'>lsjfklw</span>立刻就放松</span>
但是
<p style='...'>$$lskfjwe中<span color='red'>lsjfklw</span>立刻就放松$$</p>
则不替换

Answer 1

<p>[^\$\$].+[^\$\$]</p> 
??
帮你up

Answer 2

<p.*>[^\$\$].+[^\$\$]</p>
有过度匹配的问题

Answer 3

正则
http://blog.morock.net/blogview.asp?logID=29 
常用正则
http://www.regexlib.com/DisplayPatterns.aspx?cattabindex=5&categoryId=5

Answer 4

try
string[] slist = {"<p style='...'>lskfjwe中<span color='red'>lsjfklw</span>立刻就放松</p>",
"<p style='...'>$$lskfjwe中<span color='red'>lsjfklw</span>立刻就放松$$</p>",
"<p style='...'>$$lskfjwe中<span color='red'>lsjfklw</span>立刻就放松</p>",
"<p style='...'>lskfjwe中<span color='red'>lsjfklw</span>立刻就放松$$</p>"
}; foreach (string s in slist)
  Console.WriteLine(System.Text.RegularExpressions.Regex.Replace(s, @"<p([^>]*?>)(?([$]{2})(?<PREFIX>))([\s\S]*?)(?(?<=[$]{2})(?<POSTFIX>))(?(PREFIX)(?(POSTFIX)(?!)))</p>","<span$1$2</span>", RegexOptions.IgnoreCase));