C# - 使用正则表达式比较字符串的直接答案？

Question

I cannot understand the syntax at all! I feel like the stackoverflow community should get a simple solution to the problem I have (hopefully I'm not blind and have missed one of the thousands of regex questions here):

string myString = "$randomText$";
string myString2 = "$otherStuff$";

What would I use to check if any string has "$*$"? So as long as there's 2 $'s on the outside of the text?

Again, I'm sorry, and I Do understand there's other regex answers out there, but there's no way I'll ever understand it. I apologize, and have a good day.

Answer 1

You can do this by using this:

string myString = "$randomText$";
var match = Regex.Match(myString , @"\$.+\$");

Answer 2

You have two options. Use regex or don't. You could either substr the input string and check the first and last char are the $ sign, or you could use regex. If you're new and don't understand regex (learn to love it, a little goes a long way) then go with the substring checks. You may also find that substringing is slightly faster than regex.

For those that want spoonfeeding (untested code). This will be (most likely) be faster than any regex check:

public bool DollahCheck(string inp, string stringToCheck = "$")
{
    return inp.Substring(0,1) == stringToCheck && inp.Substring(inp.Length - 1) == stringToCheck;
}

Answer 3

use this
bool matched = Regex.Match(myString , @"yourRegexPattern").Success