用于在C＃中验证URL的正则表达式 [英] Regex for validate url in C#

问题描述

我的网址格式是

 href =https://a.abc.io/00c8 

我尝试过：

 ^（http | https）：\ / \ / www。[ A-Z0-9] +（\（COM |组织| EDU |网络|信息|商业|政府网站|协同|中| IO）\ /？）（[A-ZA-Z0-9] +）？ $ 

但它不起作用

解决方案

但它不起作用

它不起作用，因为您显示的URL示例不以www开头：

 href =https://a.abc.io/00c8

老实说，使用正则表达式解析HTML是众所周知的糟糕的主意 - 使用像 Html Agility Pack |这样的东西会更好。 HAP [ ^ ]，这使得这样的网站整个负载更容易。



但是......如果你要使用正则表达式，那么得到 Expresso [ ^ ] - 这是free，它会检查并生成正则表达式。

引用：

但它不起作用

简单，您的网址是以'.io'结尾的网站，但您的RegEx仅接受以'com | org | edu | net | info | biz | gov | co |结尾的网站'。

您需要在列表中添加'io'。

由于OG说www是另一个问题，因为您的网址不使用它。



只需几个有趣的链接来帮助构建和调试RegEx。

以下是RegEx文档的链接：

<一个人f =http://perldoc.perl.org/perlre.html> perlre - perldoc.perl.org [ ^ ]

以下是帮助构建RegEx并调试它们的工具的链接：

.NET Regex Tester - Regex Storm [ ^ ]

Expresso正则表达式工具 [ ^ ]

RegExr：Learn，Build，&测试RegEx [ ^ ]

在线正则表达式测试器和调试器：PHP，PCRE，Python，Golang和JavaScript [ ^ ]

这个显示RegEx是一个很好的图表，它非常有助于理解RegEx的作用：

Debuggex：在线可视正则表达式测试器。 JavaScript，Python和PCRE。 [ ^ ]

这个网站也在一个漂亮的图表中显示正则表达式，但无法测试与RegEx匹配的内容：

Regexper [ ^ ]

my url format is

href="https://a.abc.io/00c8

What I have tried:

^(http|https):\/\/www.[a-z0-9]+(\.(com|org|edu|net|info|biz|gov|co|in|io)\/?)([a-zA-Z0-9]+)?$

but its not working

解决方案

but its not working

It's not working because the URL example you show doesn't start with "www":

href="https://a.abc.io/00c8

To be honest, parsing HTML with a regex is well known as a bad idea - you would be much, much better off using something like the Html Agility Pack | HAP[^] which makes such site scraping a whole load easier.

But ... if you are going to use regexes, then get a copy of Expresso[^] - it's free, and it examines and generates Regular expressions.

Quote:

but its not working

Simple, your url is a site that end with '.io' but your RegEx only accept sites that end with 'com|org|edu|net|info|biz|gov|co|in'.
You need to add 'io' to the list.
As OG said 'www' is another problem because your url don't use it.

Just a few interesting links to help building and debugging RegEx.
Here is a link to RegEx documentation:
perlre - perldoc.perl.org[^]
Here is links to tools to help build RegEx and debug them:
.NET Regex Tester - Regex Storm[^]
Expresso Regular Expression Tool[^]
RegExr: Learn, Build, & Test RegEx[^]
Online regex tester and debugger: PHP, PCRE, Python, Golang and JavaScript[^]
This one show you the RegEx as a nice graph which is really helpful to understand what is doing a RegEx:
Debuggex: Online visual regex tester. JavaScript, Python, and PCRE.[^]
This site also show the Regex in a nice graph but can't test what match the RegEx:
Regexper[^]

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