C#判断是否是数字
. ![]() ![]() /// <summary> /// 判断是否是数字 /// </summary> /// <param name="str">字符串</param> /// <returns></returns> private bool IsNumeric(string str) { if (str == null || str.Length == 0) return false; System.Text.ASCIIEncoding ascii = new System.Text.ASCIIEncoding(); byte[] bytestr = ascii.GetBytes(str); foreach (byte c in bytestr) { if (c < 48 || c > 57) { return false; } } return true; } |
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