1 // <summary>
 2        /// 提取字符串中的數字字符串
 3        /// </summary>
 4        /// <param name="str"></param>
 5        /// <returns></returns>
 6        public static bool IsNumber(String str)
 7        {
 8            bool result = false;
 9            for (int i = 0; i < str.Length; i++)
 
10            {
11                if (Char.IsNumber(str, i))
12                {
13                    result = false;
14                }
15                else
16                {
17                    result = true;
18                }
19            }
20            return result;
21        }
 
22 
23       /// <summary>
24       /// 判斷是否是數字還是自負串
25       /// </summary>
26       /// <param name="str"></param>
27       /// <returns></returns>
28        private bool IsNumeric(string str)
29        {
30            
31            foreach (char c in str)
32            {
 
33                if (!Char.IsNumber(c))
34                {
35                    return false;
36                }
37            }
38            return true;
39        }
40 
41 收藏於 2010-09-16

C#判斷字符串中是否有數字