1 /// <summary> 2 /// 提取字符串中的数字字符串 3 /// </summary> 4 /// <param name="str"></param> 5 /// <returns></returns> 6 public static string IsNumber(String str) 7 { 8 string returnStr = string.Empty; 9 for (int i = 0; i < str.Length; i++)10 { 11 if (Char.IsNumber(str, i) == true)12 { 13 returnStr += str.Substring(i, 1);14 }15 else16 { 17 if (str.Substring(i, 1) == "A" || str.Substring(i, 1) == " ")18 { 19 returnStr += str.Substring(i, 1);20 }21 }22 23 }24 return returnStr;25 }