how to allow characters, space and dot in regular expression?

Question

ValidationExpression=\"^[a-zA-Z ]+$\"

this is my current regular expression but it does not accept .(dot). I need to use it for names. like \"R

Answer 1

The following expression gets all

• characters (a-zA-Z)
• whitespaces (\s) and
• dots (\.)

between the string beginning (^) and end ($):

The '@' is necessary to quote the backslashes inside the string.

ValidationExpression=@"^[a-zA-Z\s\.]+$"