求一正则 谢谢

Question

求正则：
       数字验证(包含小数点)

Answer 1

string pattern = @"[1-9]\d*(.\d*[1-9])?";

Answer 2

^[1-9]\d*\,\d*|[1-9]\d*$ //必须为数字，但是允许小数点 

Answer 3

谢谢楼上大哥们  这个 0 或者 0.2 通不过啦    
i > 0 (0.2也行)

Answer 4

  List<string> temp_list = new List<string> 
                {
                    "0",
                    "0.1",
                    "2.1",
                    "12",
                    "00",
                    "1.",
                    "001"                };
              
                string pattern = @"^([1-9]\d*|0)(\.\d+)?$";
                foreach (string str in temp_list)
                {
                    if (Regex.IsMatch(str, pattern))
                    {
                        /*
                         0
                         0.1
                         2.1
                         12
                          最后三个无法通过验证*/
                    }
                }