从字符串中提取日期，没有空格的字符串

Question

string s = "ElectricityBillPayment10/1/21 - 10/31/21";

Extract only date from string

Answer 1

Since I don't know the exact format possibilites of your string I simply added a Regex that searches for all dates in your example formats and extracts them out of the string:

string s = "ElectricityBillPayment10/1/21 - 10/31/21";
var regex = new Regex(@"\d{1,2}/\d{1,2}/\d+");
var dates = regex.Matches(s).Select(match => match.Value).ToList();