正则表达式匹配在C＃中不能很好地匹配

Question

I use VS 2017 in windows 7.

The regex match can not work for my code. Although the content has the string I want to match, it can not be matched by my code.

I have tried to use regex.Match() method in a while loop to match the resp.

Regex regex = new Regex(@"CHIP*");
var match = regex.Match(resp);
if (match.Success)
 {

   textBox1.AppendText(match.Groups[1].Value);
 }

Although resp contains "CHIP......", textBox1 shows nothing.

Answer 1

You can try to use this regex string. " ^CHIP(.+)"

Answer 2

You are using match.Groups[1].Value

Instead you should be using match.Groups[0].Value

Answer 3

Try

 if (match.Success)
 {

   textBox1.AppendText(match.Value);

 }

Answer 4

Your regex CHIP* will match the letters CHI followed by P 0->infinite times.

If what you're wanting it to behave like is a wildcard expression ( CHIP followed by anything else) then you want your expression to be:

CHIP(.*)

The brackets put that part in a match group so you can get just that part of the value, the . matches any character and the * means '0 or more times'. If you want to require something after the word CHIP (making a suffix mandatory) then you'd replace the * with a + .