1 /// <summary>
 2 /// 判断字符串是否是数字
 3 /// </summary>
 4 public static bool IsNumber(string s)
 5 {
 6     if (string.IsNullOrWhiteSpace(s)) return false;
 7     const string pattern = "^[0-9]*$";
 8     Regex rx = new Regex(pattern);
 9     return rx.IsMatch(s);
10 }