小写数字转换为中文大写的最完整C#方案

using System;using System.Text;namespace DigitToChnText{///本程序用于将小写数字转换为中文大写, 提供以下功能://2. 能识别并处理任何错误输入//3. 算法稳定, 速度较快, 中文大写比较符合语言习惯/// 本程序用于将小写数字变成大写中文数字class DigitToChnText{private readonly char[] chnText;private readonly char[] chnDigit;public DigitToChnText(){chnText = new char[]{'零', '一', '二', '三', '四', '五', '六', '七', '八', '九'};chnDigit = new char[]{'十', '百', '千', '万', '亿'};}public string Convert( string strDigit ){// 检查输入数字decimal dec;try{dec = decimal.Parse( strDigit );}catch( FormatException ){throw new Exception("输入数字的格式不正确。

");}catch( Exception e ){throw e;}if( dec <= -10000000000000000m || dec >= 10000000000000000m ) {throw new Exception( "输入数字太大或太小，超出范围。

" );}StringBuilder strResult = new StringBuilder();// 提取符号部分// '+'在最前if( "+" == strDigit.Substring( 0, 1 ) ){strDigit = strDigit.Substring( 1 );}// '-'在最前else if( "-" == strDigit.Substring( 0, 1 ) ){strResult.Append( '负' );strDigit = strDigit.Substring( 1 );}// '+'在最后else if( "+" == strDigit.Substring( strDigit.Length - 1, 1 ) ){strDigit = strDigit.Substring( 0, strDigit.Length - 1 );}// '-'在最后else if( "-" == strDigit.Substring( strDigit.Length - 1, 1 ) ){strResult.Append( '负' );strDigit = strDigit.Substring( 0, strDigit.Length - 1 );}// 提取整数和小数部分int indexOfPoint;if( -1 == ( indexOfPoint = strDigit.IndexOf('.') ) ) // 如果没有小数部分{strResult.Append( ConvertIntegral( strDigit ) );}else // 有小数部分{// 先转换整数部分if( 0 == indexOfPoint ) // 如果“.”是第一个字符{strResult.Append( '零' );}else{strResult.Append( ConvertIntegral( strDigit.Substring( 0, indexOfPoint ) ) ); }// 再转换小数部分if( strDigit.Length - 1 != indexOfPoint ) // 如果“.”不是最后一个字符{strResult.Append( '点');strResult.Append( ConvertFractional( strDigit.Substring( indexOfPoint + 1 ) ) ); }}return strResult.ToString();}// 转换整数部分protected string ConvertIntegral(string strIntegral){// 去掉数字前面所有的'0'// 并把数字分割到字符数组中char[] integral = ( ( long.Parse( strIntegral ) ).ToString() ).ToCharArray();// 变成中文数字并添加中文数位StringBuilder strInt = new StringBuilder();int i;int digit;digit = integral.Length - 1;// 处理最高位到十位的所有数字for( i = 0; i < integral.Length - 1; i++ ){strInt.Append( chnText[ integral[i] - '0'] );if( 0 == digit % 4 ) // '万' 或'亿'{if( 4 == digit || 12 == digit ){strInt.Append( chnDigit[3] ); // '万'}else if( 8 == digit ){strInt.Append( chnDigit[4] ); // '亿'}}else // '十'，'百'或'千'{strInt.Append( chnDigit[digit % 4 - 1] );}digit--;}// 如果个位数不是'0'// 或者个位数为‘0’但只有一位数// 则添加相应的中文数字if( '0' != integral[ integral.Length - 1 ] || 1 == integral.Length ){strInt.Append( chnText[ integral[ i ] - '0' ] );}// 遍历整个字符串i = 0;while( i < strInt.Length){int j = i;bool bDoSomething = false;// 查找所有相连的“零X”结构while( j < strInt.Length - 1 && "零" == strInt.ToString().Substring( j, 1 ) ) {string strTemp = strInt.ToString().Substring( j + 1, 1 );// 如果是“零万”或者“零亿”则停止查找if( "万" == strTemp || "亿" == strTemp ){bDoSomething = true;break;}j += 2;}if( j != i) // 如果找到“零X”结构，则全部删除{strInt = strInt.Remove( i, j - i);// 除了在最尾处，或后面不是"零万"或"零亿"的情况下,// 其他处均补入一个“零”if( i <= strInt.Length - 1 && !bDoSomething ){strInt = strInt.Insert( i, '零' );i++;}if( bDoSomething ) // 如果找到"零万"或"零亿"结构{strInt = strInt.Remove( i, 1 ); // 去掉'零'i++;continue;}// 指针每次可移动2位i += 2;}// 遇到“亿万”变成“亿零”或"亿"int index = strInt.ToString().IndexOf( "亿万" );if( -1 != index ){if( strInt.Length - 2 != index && // 如果"亿万"不在最后( index + 2 < strInt.Length && "零" != strInt.ToString().Substring( index + 2, 1) ) ) // 并且其后没有"零"strInt = strInt.Replace( "亿万", "亿零", index, 2 );elsestrInt = strInt.Replace( "亿万", "亿", index, 2);}// 开头为“一十”改为“十”if( strInt.Length > 1 && "一十" == strInt.ToString().Substring( 0, 2 ) ){strInt = strInt.Remove( 0, 1 );}return strInt.ToString();}// 转换小数部分protected string ConvertFractional( string strFractional ){char[] fractional = strFractional.ToCharArray();StringBuilder strFrac = new StringBuilder();// 变成中文数字int i;for( i = 0; i < fractional.Length; i++ )strFrac.Append( chnText[ fractional[ i ] - '0' ] );}return strFrac.ToString();}////// The main entry point for the application.///[STAThread]static void Main(string[] args){DigitToChnText obj = new DigitToChnText();string str = " ";while( "" != str ){Console.Write( "请输入小写数字: " );if( "" == ( str = Console.ReadLine() ) )break;try{Console.WriteLine( "大写中文数字为: {0}\n", obj.Convert( str ) );}catch( Exception e ){Console.WriteLine( "错误: {0}\n", e.Message );continue;}}}}}本文来自CSDN博客，转载请标明出处：/waterboy/archive/2004/08/13/74060.asp方法二：例如：(new Money(200)).ToString() == "贰佰元"namespace Skyiv.Util{using System.Text;class Test{static void Main(){for (;;){System.Console.Write( "金额: ");string s = System.Console.ReadLine();decimal m;try { m = decimal.Parse(s); }catch { break; }System.Console.WriteLine( "大写: " + new Money(m));}}}// 该类重载的ToString() 方法返回的是大写金额字符串class Money{public string Yuan = "元"; // “元”，可以改为“圆”、“卢布”之类public string Jiao = "角"; // “角”，可以改为“拾”public string Fen = "分"; // “分”，可以改为“美分”之类static string Digit = "零壹贰叁肆伍陆柒捌玖"; // 大写数字bool isAllZero = true; // 片段内是否全零bool isPreZero = true; // 低一位数字是否是零bool Overflow = false; // 溢出标志long money100; // 金额*100，即以“分”为单位的金额long value; // money100的绝对值StringBuilder sb = new StringBuilder(); // 大写金额字符串，逆序// 只读属性: "零元"public string ZeroString{get { return Digit[0] + Yuan; }}// 构造函数public Money(decimal money){try { money100 = (long)(money * 100m); }catch { Overflow = true; }if (money100 == long.MinV alue) Overflow = true;}// 重载ToString() 方法，返回大写金额字符串public override string ToString(){if (Overflow) return "金额超出范围";if (money100 == 0) return ZeroString;string [] Unit = { Yuan, "万", "亿", "万", "亿亿" };value = System.Math.Abs(money100);ParseSection(true);for (int i = 0; i < Unit.Length && value > 0; i++){if (isPreZero && !isAllZero) sb.Append(Digit[0]);if (i == 4 && sb.ToString().EndsWith(Unit[2]))sb.Remove(sb.Length - Unit[2].Length, Unit[2].Length);sb.Append(Unit[i]);ParseSection(false);if ((i % 2) == 1 && isAllZero)sb.Remove(sb.Length - Unit[i].Length, Unit[i].Length);}if (money100 < 0) sb.Append( "负");return Reverse();}// 解析“片段”: “角分(2位)”或“万以内的一段(4位)”void ParseSection(bool isJiaoFen){string [] Unit = isJiaoFen ?new string [] { Fen, Jiao } :new string [] { " ", "拾", "佰", "仟" };isAllZero = true;for (int i = 0; i < Unit.Length && value > 0;i++){int d = (int)(value % 10);if (d != 0){if (isPreZero && !isAllZero) sb.Append(Digit[0]);sb.AppendFormat( "{0}{1} ", Unit[i], Digit[d]);isAllZero = false;}isPreZero = (d == 0);value /= 10;}}// 反转字符串string Reverse(){StringBuilder sbReversed = new StringBuilder();for (int i = sb.Length - 1; i > = 0; i--)sbReversed.Append(sb[i]);return sbReversed.ToString();}}}。