1 + [0-9]+ 字符串中出现一次或者多次数字 2  3  4 using System; 5 using System.Collections.Generic; 6 using System.Linq; 7 using System.Net; 8 using System.Text; 9 using System.Text.RegularExpressions;10 using System.Threading.Tasks;11 12 namespace ConsoleApplication713 {14     class Program15     {16         static void Main(string[] args)17         {18                                       //0-9数字出现了一次或者多次19             string regularExpression = @"[0-9]+";20             Regex rg = new Regex(regularExpression);21 22             string [] contents = { @"@@@", @"aaaa", "a3bb33345", "a321b3" };23             for (int i = 0; i < contents.Length; i++)24             {25                 if(rg.IsMatch(contents[i]))26                 {27                     Console.WriteLine(contents[i]+"符合正则表达式");28                 }29                 else30                 {31                     Console.WriteLine(contents[i] + "不符合正则表达式");32 33                 }34             }35 36             Console.ReadKey();37         }38     }39 }