[英]VBNet RegEx Pattern
I'm currently developing a SMS application in vbnet. 我目前正在vbnet中开发一个SMS应用程序。 One problem I encountered is when the sim card runs out of load.
我遇到的一个问题是当SIM卡耗尽时。 So I make a function that checks the balance if sending a message failed for 3 times.
因此,如果发送消息失败3次,我会创建一个检查余额的函数。 Now the problem is how can i parse or get the value from the string.
现在的问题是如何解析或从字符串中获取值。 I know this can be done in ReGex ( or you can suggest me if you have a better technique for this ).
我知道这可以在ReGex中完成( 或者你可以建议我,如果你有更好的技术 )。 This is the reply from the service provider:
这是服务提供商的回复:
Your current balance as of 02/15/2012 00:17 is P1.00 valid til...
I need to get the P1.00
from the string. 我需要从字符串中获取
P1.00
。 And the possible valid format of the balance is: 并且可能的有效格式是:
So as you can see, the pattern has a monetary symbol of P
(or sometimes Php
) and followed by a numeric value. 如您所见,该模式的货币符号为
P
(或有时为Php
),后跟数值。 Sometimes it has a white space between the monetary symbol and the value. 有时它在货币符号和值之间有一个空格。 The pattern also has two decimal places.
该模式还有两个小数位。 Now how can i do this using ReGex?
现在我如何使用ReGex做到这一点?
I cannot show some codes since I have no (even a single) idea where should i start from. 我无法显示一些代码,因为我没有(甚至一个)想法我应该从哪里开始。 I really need your help.
我真的需要你的帮助。
From a quick test in Expresso, this should do it for you: 通过Expresso中的快速测试,这应该为您做到:
(?i)[P|Php](?: ?)(\d*\.\d\d) valid
And as explanation: 作为解释:
(?i) == case insensitive
[p|php] == p or php
(?: ?) == a space, 0 or 1 repetitions, but do not capture the group
(\d*\.\d\d) == a digit any amount, followed by a . followed by two digits
If you know that the response will be in that form, you might consider validating the whole message at the same time. 如果您知道响应将采用该格式,则可以考虑同时验证整个消息。
Dim pattern = new Regex("^Your current balance as of \d{2}/\d{2}/\d{4} \d{2}:\d{2} is (?<amount>P(?:hp)?\s*\d+\.\d{2}) valid til")
Dim match = pattern.Match(input)
Dim amount = match.Groups("amount").ToString()
Amount will include both the prefix and the number. 金额将包括前缀和数字。
Here's an explanation of the regex. 这是正则表达式的解释。
^ (Beginning of string)
Your current balance as of (Literal text)
\d{2}/\d{2}/\d{4} \d{2}:\d{2} (Date and time)
is (Literal string " is ")
(?<amount> (Begin named capture group)
P (Literal "P")
(?:hp)? (Optional non-capturing "hp")
\s* (0 or more whitespace characters)
\d+\.\d{2} (1 or more numbers, dot, two numbers
) (End named capture group)
valid til (Literal text)
Hope this helps. 希望这可以帮助。
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