使用正则表达式索引来匹配未知字符串? [英] Use regex index to match unknown strings?

问题描述

您好，我已经成功地从HTML输出中解析了该字符串，但是如果该字符串不存在，则会出现问题

例如，我有一个字符串，指出班上生病的孩子的人数.
"41中有3个"，但是该数字总是在变化，因此我需要一种方法来标识特定中的"以及两个整数3和41，它们实际上只是字符串的一部分.

如果我不知道确切值，可以使用通配符表示数字吗?


我希望有人知道我要说的话，并且知道答案

Hello again I have successfully parsed the string from my HTML output but am having problems if the string does not exist

For example I have a string that states the number of kids in a class that are sick.
"3 out of 41" but that number always changes so I need a way to identify the "out of" and also the two integers 3 and 41 that are just part of the string really.

Can I somehow use a wild card to represent the numbers if I do not know there exact value?


I hope someone knows what I am trying to say and knows the answer

thank you in advance!

推荐答案

hii

尝试Expresso工具

http://www.ultrapico.com/Expresso.htm [

hii

try Expresso tool

http://www.ultrapico.com/Expresso.htm[^]

因此，您拥有:

So, you have:

number out of number

数字是一个数字序列，至少包含一个数字:
正则表达式数字:\d
至少一个:+

现在您要提取这两个数字:(\d+)

全部放在一起(C#):

A number is a sequence of digits, with at least one digit:
Regex digit: \d
At least one: +

Now you my want to extract these two numbers: (\d+)

Putting all together (C#):

string pattern = @"(\d+) out of (\d+)";

获取全文(C#)中的所有匹配项:

Getting all matches in the whole text (C#):

string fullText = ...;
string pattern = @"(\d+) out of (\d+)";
int all = 0;
int sick = 0;
int count = 0;
foreach(var match in Regex.Matches(fullText, pattern).Cast<Match>())
{
    sick += int.Parse(match.Group[1].Value);
    all += int.Parse(match.Group[2].Value);
    count++;
}
Console.WriteLine("From {0} classes, {1}% are sick",
                   count, all > 0 ? sick / all : 0); 

干杯
安迪

Cheers
Andi

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