vb.net RegEx替换

Question

I have a regex that searches an input string looking for a possible SSN. That part all works great, but I want to be able to replace what I detect as a SSN with a string of asterisks.

For example, if 123456789 is my SSN to replace and I use "123456789, 00123456789000, 1234567899999" as the input string, I just want to end up with "*********, 00123456789000, 1234567899999" but everything I am trying is affecting the second and third string elements as well.

I was thinking that I could use my initial search pattern as the same replace pattern but also make sure there wasn't a digit on each side of it but I can't get it to work.

This is my search pattern and it works fine:

Dim reg As New Regex("\d{3}\D{0,1}\d{2}\D{0,1}\d{4,}") 

Answer 1

您可以使用\\b ...确定模式前后的字边界。

"\b\d{3}\D{0,1}\d{2}\D{0,1}\d{4}\b"