如何从C＃中的URL查询字符串中提取值？ [英] How to extract a value from a URL query string in C#?

问题描述

可能重复：

从Uri中获取单个查询参数

我有得到了这样的网址：

I have got a URL like this:

http://somedomain.com/website/webpage.aspx?token=123456&language=English

我的目标是提取123456 query-string参数中只能有一个付款ID。我可以使用哪种正则表达式？我正在使用C＃（.NET）。

My goal is to extract 123456 from it. There can only be one payment ID in the query-string parameter. What kind of regular expression can I use? I am using C# (.NET) by the way.

谢谢

推荐答案

token =（\d +）应该可以解决问题

也可以满足aplhas的需要要么执行以下操作：

To cater for aplhas as well you can do either:

token =（[[a-zA-Z0-9 + / =] +）即可匹配您期望的字符。这将匹配令牌=，然后捕获与字符类匹配的所有以下字符，即az，AZ，0-9，+，/和=。

token=([a-zA-Z0-9+/=]+) to explicitly match on the characters you expect. This matches "token=" and then captures all following characters that match the character class, that is, a-z, A-Z, 0-9, +, / and =.

或

token =（[[^&＃] +）以匹配除您知道的字符以外的任何字符可以完成令牌。这匹配 token =，然后捕获所有字符，直到第一个& ，＃或字符串的末尾

token=([^&#]+) to match any character except for the ones you know can finish the token. This matches "token=" and then captures all characters until the first &, # or the end of the string.

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