string tempStr = File.ReadAllText(@"C:\Documents and Settings\Administrator\桌面\Test.txt", Encoding.GetEncoding("GB2312"));//读取txt
                string pattern = @"(?<=/\D*?)\d+(?=.*?\.)";





                foreach (Match m in Regex.Matches(tempStr, pattern))
                {
                    //循环输出
                    string value = m.Value;//6720130
                }