How to check if an integer includes a certain number in c#

问题

Is there a way I can check Integers if they contain a certain number in C#?

For example:

I want to check for 7. When I enter 17, the code will return 1. When I enter 28, the code will return 0.

Thank You

回答1:

int number = 17;
int digit = 7;
bool result = number.ToString().Contains(digit.ToString());

回答2:

Convert it to a string, then use String.Contains:

int i = 17;
int j = 28
int k = 7;

bool a = i.ToString().Contains(k.ToString());
bool b = j.ToString().Contains(k.ToString());

来源：https://stackoverflow.com/questions/33157225/how-to-check-if-an-integer-includes-a-certain-number-in-c-sharp