标签:style blog ar color sp for on 数据 div
public class Converter { private static String keys = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";//编码,可加一些字符也可以实现72,96等任意进制转换,但是有符号数据不直观,会影响阅读。 private static int exponent = keys.Length;//幂数 //string conn_Str = ""; /// <summary> /// 十进制转多进制 /// </summary> /// <param name="value">十进制的值<</param> /// <param name="s">进制字符<</param> /// <param name="k">多少进制<</param> /// <returns>Return a specified 62 encode string</returns> public static string Decimal2Str(decimal value, string s = "", int k = 0) { string result = string.Empty; if (s != "") { keys = s; } else { if (k >= 2 && k <= 36)//二进制到36进制 { keys = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"; keys = keys.Substring(0, k); } } exponent = keys.Length; do { decimal index = value % exponent; result = keys[(int)index] + result; value = (value - index) / exponent; } while (value > 0); return result; } /// <summary> /// 多进制转十进制 /// </summary> /// <param name="value">多进制的值</param> /// <param name="s">进制字符<</param> /// <param name="k">多少进制<</param> /// <returns>Return a specified decimal number that decode by 62 string</returns> public static decimal Str2Decimal(string value, string s = "", int k = 0) { decimal result = 0; if (s != "") { keys = s; } else { if (k >= 2 && k <= 36)//二进制到36进制 { keys = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"; keys = keys.Substring(0, k); } } exponent = keys.Length; for (int i = 0; i < value.Length; i++) { int x = value.Length - i - 1; result += keys.IndexOf(value[i]) * Pow(exponent, x);// Math.Pow(exponent, x); } return result; } /// <summary> /// 一个数据的N次方 /// </summary> /// <param name="x"></param> /// <returns></returns> private static decimal Pow(decimal baseNo, decimal x) { decimal value = 1;////1 will be the result for any number‘s power 0.任何数的0次方,结果都等于1 while (x > 0) { value = value * baseNo; x--; } return value; } }
标签:style blog ar color sp for on 数据 div
原文地址:http://www.cnblogs.com/ilookbo/p/4159627.html