private void Page_Load(object sender, System.EventArgs e)
{
//调用 Response.Write(new Number2English().NumberToString(123456789.12));
}Number2English#region Number2English public class Number2English
{ private string[] StrNO = new string[19]; private string[] Unit = new string[8]; private string[] StrTens = new string[9]; NumberToString#region NumberToString public string NumberToString(double Number) { string Str; string BeforePoint; string AfterPoint; string tmpStr; int nBit; string CurString; int nNumLen; Init(); Str = Convert.ToString(Math.Round(Number,2)); if (Str.IndexOf(".")==-1) { BeforePoint = Str; AfterPoint = ""; 
} else { BeforePoint = Str.Substring(0,Str.IndexOf(".")); AfterPoint = Str.Substring(Str.IndexOf(".")+1,Str.Length - Str.IndexOf(".")-1); } if (BeforePoint.Length > 12) { return null; } Str = ""; while (BeforePoint.Length > 0) { nNumLen = Len(BeforePoint); if (nNumLen % 3 == 0) { CurString = Left(BeforePoint, 3); BeforePoint = Right(BeforePoint, nNumLen - 3); } else { CurString = Left(BeforePoint, (nNumLen % 3)); BeforePoint = Right(BeforePoint, nNumLen - (nNumLen % 3)); } nBit = Len(BeforePoint) / 3; tmpStr = DecodeHundred(CurString); if((BeforePoint == Len(BeforePoint).ToString() || nBit ==0) && Len(CurString) ==3) { if (System.Convert.ToInt32(Left(CurString, 1)) != 0 & System.Convert.ToInt32(Right(CurString, 2)) != 0) { tmpStr = Left(tmpStr, tmpStr.IndexOf(Unit[3]) + Len(Unit[3])) + Unit[7] + " " + Right(tmpStr, Len(tmpStr) - (tmpStr.IndexOf(Unit[3]) + Len(Unit[3]))); } else { tmpStr = Unit[7] + " " + tmpStr; } } if (nBit == 0) { Str = Convert.ToString(Str + " " + tmpStr).Trim(); } else { Str = Convert.ToString(Str + " " + tmpStr + " " + Unit[nBit-1]).Trim(); } if (Left(Str, 3) == Unit[7]) { Str = Convert.ToString(Right(Str, Len(Str) - 3)).Trim(); } if( BeforePoint == Len(BeforePoint).ToString()) { return ""; } } BeforePoint = Str; if (Len(AfterPoint) > 0) { AfterPoint = Unit[5] + " " + DecodeHundred(AfterPoint) + " " + Unit[6]; } else { AfterPoint = Unit[4]; } return BeforePoint + " " + AfterPoint; } #endregion Init#region Init private void Init() { if (StrNO[0] != "One") { StrNO[0] = "One"; StrNO[1] = "Two"; StrNO[2] = "Three"; StrNO[3] = "Four"; StrNO[4] = "Five"; StrNO[5] = "Six"; StrNO[6] = "Seven"; StrNO[7] = "Eight"; StrNO[8] = "Nine"; StrNO[9] = "Ten"; StrNO[10] = "Eleven"; StrNO[11] = "Twelve"; StrNO[12] = "Thirteen"; StrNO[13] = "Fourteen"; StrNO[14] = "Fifteen"; StrNO[15] = "Sixteen"; StrNO[16] = "Seventeen"; StrNO[17] = "Eighteen"; StrNO[18] = "Nineteen"; StrTens[0] = "Ten"; StrTens[1] = "Twenty"; StrTens[2] = "Thirty"; StrTens[3] = "Forty"; StrTens[4] = "Fifty"; StrTens[5] = "Sixty"; StrTens[6] = "Seventy"; StrTens[7] = "Eighty"; StrTens[8] = "Ninety"; Unit[0] = "Thousand"; Unit[1] = "Million"; Unit[2] = "Billion"; Unit[3] = "Hundred"; Unit[4] = "Only"; Unit[5] = "Point"; Unit[6] = "Cent"; Unit[7] = "And"; } } #endregion DecodeHundred#region DecodeHundred private string DecodeHundred(string HundredString) { int tmp; string rtn=""; if( Len(HundredString) > 0 && Len(HundredString) <= 3) { switch (Len(HundredString)) { case 1: tmp = System.Convert.ToInt32(HundredString); if (tmp != 0) { rtn=StrNO[tmp-1].ToString(); } break; case 2: tmp = System.Convert.ToInt32(HundredString); if (tmp != 0) { if ((tmp < 20)) { rtn=StrNO[tmp-1].ToString(); } else { if (System.Convert.ToInt32(Right(HundredString, 1)) == 0) { rtn=StrTens[Convert.ToInt32(tmp / 10)-1].ToString(); } else { rtn=Convert.ToString(StrTens[Convert.ToInt32(tmp / 10)-1] + "-" + StrNO[System.Convert.ToInt32(Right(HundredString, 1))-1]); } } } break; case 3: if (System.Convert.ToInt32(Left(HundredString, 1)) != 0) { rtn=Convert.ToString(StrNO[System.Convert.ToInt32(Left(HundredString, 1))-1] + " " + Unit[3] + " " + DecodeHundred(Right(HundredString, 2))); } else { rtn=DecodeHundred(Right(HundredString, 2)).ToString(); } break; default: break; } } return rtn; } #endregion Left#region Left private string Left(string str,int n) { return str.Substring(0,n); } #endregion Right#region Right private string Right(string str,int n) { return str.Substring(str.Length-n,n); } #endregion Len#region Len private int Len(string str) { return str.Length; } #endregion } #endregion