的正则表达式字母数字密码，至少1个数字和字符 [英] Regex for alphanumeric password, with at least 1 number and character

问题描述

需要与字母数字密码正则表达式的帮助，至少有1号和字符，长度必须在8-20个字符之间。

我有这个，但似乎并不奏效（它没有长度要求其一）：

  ^ [A-ZA-z0- 9] * [A-ZA-Z] [A-ZA-Z0-9] * $ 
  

解决方案

如果你看看这个 MSDN链接，它提供了密码验证的正则表达式表达的一个例子，和（更具体地说）如何在ASP.NET中使用它。

有关你要找来完成，这算什么应工作：（？！^ [0-9] * $）？！

 （^ [A-ZA-Z] * $）^（[A-ZA-Z0-9] {8,20}）$ 
  

这至少需要一个数字，至少一个字母字符，没有特殊的字符，并从8-20个字符的长度。

Need help with a regex for alphanumeric password, with at least 1 number and character, and the length must be between 8-20 characters.

I have this but doesn't seem to be working (it doesn't have length requirements either):

^[A-Za-z0-9]*[A-Za-z][A-Za-z0-9]*$

解决方案

If you take a look at this MSDN link, it gives an example of a password validation RegEx expression, and (more specifically) how to use it in ASP.NET.

For what you're looking to accomplish, this should work:

    (?!^[0-9]*$)(?!^[a-zA-Z]*$)^([a-zA-Z0-9]{8,20})$

This requires at least one digit, at least one alphabetic character, no special characters, and from 8-20 characters in length.

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