Question

I have a text field which I need to validate using a regex. My requirement is as follow:

www.un.org/Depts/DGACM/index_french.htm

1234ABCDEFG or 123-ABCDEFG (例示)

规则:

The whole string is maximum 25 characters
The first four characters (CCCC) must be alphanumeric
CCCC is 4 characters exactly and can be digits or number
CCCC can have a dash sign as 4th character
NNNNNNNNNNNN can be up to 21 characters and only numbers

例如,AAAAAA<1234>是CCC的有效载体。

我的研究说明如下:

I will need to match numerics first
I will need the + char to specify to match this pattern X times
I will need to match letters after that for 8-9 spaces

这里有一个令人 wonder切的职位:

https://stackoverflow.com/questions/4246077/simple-problem-with-table-expression- only-datas-and-commas/4247184#4247184>

我的目标是将这一区域评价模式应用到“WinForms”的文箱Mask。

Answer 1

........

......yeah - 我认为你正在寻找的答案是:

^[0-9A-Za-z]{3}[0-9A-Za-z-]d{0,21}$

注

^               # assert beginning (not in the middle)
[0-9A-Za-z]{3}  # three characters that are: 0-9 or a-z (upper or lower)
[0-9A-Za-z-]    # one character that is: 0-9 or a-z (upper or lower) or a dash
d{0,21}        # anywhere from 0 to 21 digits
$               # assert at the end (not somewhere in the middle

如果你想将这种表述的几例相匹配,则将上述表述(具体表述)与允许分离这些数值的任何内容(s或“whitespace”)相提并论,然后使用+之四:

^([0-9A-Za-z]{3}[0-9A-Za-z-]d{0,21}s+)+$

将匹配/确定以下投入:

1234567890 AAAA123456789012345678901 GGG-123       hhh5   A1B2000000000

如果你想要其他东西的话,你就不得不提出一个更清楚的问题(在你的问题中,有许多矛盾和重复之处,使得你无法想象会混淆)。

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