C#字符串处理，通过波浪号合并

Question

产品有不同的型号，型号比如有a1,a2,b1,b2,b3，ab1,a 等等.

现在假设有a1,a2,a3,a4如何通过代码转换为a1~a4.

谢谢！

Answer 1

var mystr = "产品有不同的型号，型号比如有ab1,ab2,b1,b2,b3，等等.现在假设有a1,a2,a3,a4";var matches = Regex.Matches(mystr, @"([a-z]+)\d+\s*[,，]\s*(\1(\d+)(?:\s*[,，]\s*)*)*");foreach (Match match in matches){　　if (string.IsNullOrEmpty(match.Groups[3].Value))　　{　　　　continue;　　}　　var str = match.Value;　　var chart = match.Groups[1].Value;　　var count = Convert.ToInt32(match.Groups[3].Value);　　if (count>1)　　{　　　　mystr = mystr.Replace(str, chart + "1~" + chart + count+",");　　}}Console.WriteLine(mystr);