Regex to check if string only contain digits and is 11 characters/digits long?

currently I am using:

if (Regex.IsMatch(searchValue, @"^\d{11}.*") && searchValue.Length == 11)
   {
开发者_如何学运维     // Do something
   }

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

Thanks in advance.

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Changing the pattern to

@"^\d{11}$"

Should do it

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Use the following expression:

^\d{11}$

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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.