c# - 解析 AT 命令响应的正则表达式

Question

我正在尝试从 AT 命令响应中获取返回消息。

这是输入:

AT+CUSD=1,"*124#",15

OK

+CUSD: 2,"00302220100 Your main balance is 10K, valid until 23/10/2015. For more balance details, please send BAL to 1"

我的预期结果是:

00302220100 Your main balance is 10K, valid until 23/10/2015. For more balance details, please send BAL to 1

这是我的代码:

    private string ParseMessages_ChkCredit(string input)
    {
        string messages = "";
        Regex r = new Regex("\\AT+CUSD: (\\d+),\"(.*?)\"", RegexOptions.Singleline);
        Match m = r.Match(input);
        while (m.Success)
        {
            messages = m.Groups[2].Value.ToString();
            break;
        }
        return messages;
    }

正则表达式不匹配。请帮助我。非常感谢。

Answer 1

(?<=AT\+[\s\S]*?CUSD:[^"]*")[^"]*

您可以使用变量lookbehind。 See demo.

string strRegex = @"(?<=AT\+[\s\S]*?CUSD:[^""]*"")[^""]*";
Regex myRegex = new Regex(strRegex, RegexOptions.None);
string strTargetString = @"AT+CUSD=1,""*124#"",15" + "\n" + @"OK" + "\n\n" + @"+CUSD: 2,""00302220100 Your main balance is 10K, valid until 23/10/2015. For more balance details, please send BAL to 1""" + "\n";

foreach (Match myMatch in myRegex.Matches(strTargetString))
{
  if (myMatch.Success)
  {
    // Add your code here
  }
}