2个字符串之间的文本的正则表达式模式 [英] Regex pattern for text between 2 strings

问题描述

我正在尝试按照以下模式提取所有文本(显示为xxxx):

I am trying to extract all of the text (shown as xxxx) in the follow pattern:

Session["xxxx"]

使用c#

这可能是 Request.Querystring ["xxxx"] ，所以我试图动态构建表达式.当我这样做时，我会遇到有关未转义字符或不匹配的各种问题:(

This may be Request.Querystring["xxxx"] so I am trying to build the expression dynamically. When I do so, I get all sorts of problems about unescaped charecters or no matches :(

一个例子可能是:

string patternstart = "Session[";
string patternend = "]";
string regexexpr = @"\\" + patternstart + @"(.*?)\\" + patternend ;
string sText = "Text to be searched containing Session[\"xxxx\"] the result would be xxxx";

MatchCollection matches = Regex.Matches(sText, @regexexpr);

当我感到困惑时，任何人都可以提供帮助(就像我一直在使用RegEx一样:))

Can anyone help with this as I am stumped (as I always seem to be with RegEx :) )

推荐答案

对代码进行一些修改.

string patternstart = Regex.Escape("Session[");
string patternend = Regex.Escape("]");
string regexexpr = patternstart + @"(.*?)" + patternend;

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