寻找附在[[]]中的字符串键 [英] Finding keys in string enclosed with [[ ]]

问题描述

我有有之间的[[]]一些关键字符串

I have a string which has some keys between [[]].

 string s = "<p>Hi [[USER]],<br/>How are you doing<br/>Regards,<br/>[[SENDER]]</p>";

我想先取中对此我tyring通过做一个列表中的键名用户和发件人

I want to first fetch the key names USER and SENDER in a list which i am tyring to do by:

 var keys = new List<string>();
        foreach (Match match in Regex.Matches(s, @"[[(.*?)]]")) 
        {
            keys.Add(match.Value);
        }

不过，该键来了空。

However, The keys are coming empty.

谁能告诉我什么，我做错了。

Can anyone tell me what I'm doing wrong?

另外，我尝试使用<< >>而不是[[]]这是工作，但是当我将数据加载到<字消失;< >>

Also, I tried using << >> instead of [[ ]] which is working but words disappear when I load data into << >>

推荐答案

看来你需要逃避'['：

It seems you need to escape '[':

string s = "<p>Hi [[USER]],<br/>How are you doing<br/>Regards,<br/>[[SENDER]]</p>";

var keys = new List<string>();
foreach (Match match in Regex.Matches(s, @"\[\[(.*?)]]"))
{
    keys.Add(match.Value.Trim('[').Trim(']'));
}

要排除 [[]] 不修剪，使用 @（小于？= \ [\ [）（。*？）（？=]）

或者像@ Wiktor的-stribiżew指出的那样，你可以简化为：

Or as @wiktor-stribiżew pointed out, you can simplify that to be:

var keys = Regex.Matches(s, @"\[\[(.*?)]]").Cast<Match>()
                                          .Select(p => p.Groups[1].Value).ToList()

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