Need help with regular expression for Name validations

hi all,

i need regular expression following requirements name validations.

1. name should contains atleast 1 alphabets.

2. may contains period, hyphen, apostraphe , space( may multiple not consecutive).

eg:

valid strings: 

test

t.te-test test

test-test'test.test, .test

invalid strings:

test......test

-.

test----test

i tried below one, no luck.

^(?!.*(.)\1)[\s.'-]*[a-za-z].*$

thanks in advance.

hi, please try this:

    string pattern = @"^(?!.*(-{2,}|'{2,}| {2,}|\.{2,}))(?=.*[a-za-z])[a-za-z-\.' ]*$";
     console.writeline(regex.ismatch("test", pattern));//true     console.writeline(regex.ismatch("t.te-test test", pattern));//true     console.writeline(regex.ismatch("test-test'test.test .test", pattern));//true     console.writeline(regex.ismatch("test-test'test.test, .test", pattern));//false     console.writeline(regex.ismatch("test......test", pattern));//false     console.writeline(regex.ismatch("-.", pattern));//false     console.writeline(regex.ismatch("test----test", pattern));//false

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