正则表达式检查字符串是否只包含数字，长度是11个字符/数字？

Question

currently I am using:

if (Regex.IsMatch(searchValue, @"^\d{11}.*") && searchValue.Length == 11)
   {
     // Do something
   }

How can I alter the regex to also check the length and not to use the && operator?

Thanks in advance.

Answer 1

Changing the pattern to

@"^\d{11}$"

Should do it

Answer 2

使用以下表达式：

^\\d{11}$

Answer 3

I tend to use the Expresso tool for designing regex patterns, especially as they get complex. It shows a breakdown that clearly tells you what each bit of the regex is doing. Agree with other posters (Marc/Logicnp) for the answer to the OP's problem.