如何从C＃中的字符串中提取字符串

Question

VS 2015, c#. I have a string...

string str = "Name;IPAddress";

I want to extract just the IPAddress. I suspect Regex is the best way to do it but I am unsure.

Any assistance greatly appreciated.

Answer 1

You can use Split

string str = "Name;IPAddress";
string[] both = str.Split(';');
string name = both[0];
string ipadd = both[1];

Answer 2

Why do you think Regex is the best way? Do you also want to validate name and IP address?

string sInput = "John;127.0.0.1";
string[] arrNameAndIP = sInput.Split(';');

bool bIsInputValid = false;
if(arrNameAndIP.Length == 2)
{
    Regex rgxNamePattern = new Regex("^[A-za-z]+$");
    bool bIsNameValid = rgxNamePattern.IsMatch(arrNameAndIP[0]);

    IPAddress ipAddress;
    bool bIsIPValid = IPAddress.TryParse(arrNameAndIP[1], out ipAddress);
    bIsInputValid = bIsNameValid && bIsIPValid;
}