货币中文转换类

using System;

namespace Money
 {
     public class MoneyUpperConverter
     {
         public DecimalUpperConverter()
         {
             //
             // TODO: 在此处添加构造函数逻辑
            //
         }

        #region 小写金额转换为大写金额，其他条件：金额小于一万亿，最多两位小数
        /// <summary>
         /// 小写金额转换为大写金额，其他条件：金额小于一万亿，最多两位小数
        /// </summary>
         /// <param name="d">源金额，d 《 1000000000000.00(一万亿)，且最多两位小数 </param>
         /// <returns>结果，大写金额</returns>
         public static string ToUpper(decimal d)
         {
             if (d == 0)
             {
                 return "零元整";
             }

            string je = d.ToString("####.00");
             if (je.Length > 15)
             {
                 return string.Empty;
             }
             je = new String('0', 15 - je.Length) + je;      //若小于15位长，前面补0

            string stry = je.Substring(0, 4);        //取得'亿'单元
            string strw = je.Substring(4, 4);        //取得'万'单元
            string strg = je.Substring(8, 4);        //取得'元'单元
            string strf = je.Substring(13, 2);        //取得小数部分

            string str1 = string.Empty;
             string str2 = string.Empty;
             string str3 = string.Empty;

            DecimalUpperConverter objConverter = new DecimalUpperConverter();
             str1 = objConverter.m_strConvertSingleUnit(stry, "亿");        //亿单元的大写
            str2 = objConverter.m_strConvertSingleUnit(strw, "万");        //万单元的大写
            str3 = objConverter.m_strConvertSingleUnit(strg, "元");        //元单元的大写


            string str_y = string.Empty;
             string str_w = string.Empty;
             if (je[3] == '0' || je[4] == '0')        //亿和万之间是否有0
             {
                 str_y = "零";
             }
             if (je[7] == '0' || je[8] == '0')        //万和元之间是否有0
             {
                 str_w = "零";
             }

 

            string strResult = str1 + str_y + str2 + str_w + str3;    //亿，万，元的三个大写合并

            for (int i = 0; i < strResult.Length; i++)        //去掉前面的"零"   
             {
                 if (strResult[i] != '零')
                 {
                     strResult = strResult.Substring(i);
                     break;
                 }

            }
             for (int i = strResult.Length - 1; i > -1; i--)      //去掉最后的"零" 
             {
                 if (strResult[i] != '零')
                 {
                     strResult = strResult.Substring(0, i + 1);
                     break;
                 }
             }

            if (strResult[strResult.Length - 1] != '元')        //若最后不位不是'元'，则加一个'元'字
            {
                 strResult = strResult + "元";
             }

            if (strResult == "零零元")           //若为零元，则去掉"元数"，结果只要小数部分
            {
                 strResult = string.Empty;
             }

            if (strf == "00")            //下面是小数部分的转换
            {
                 strResult = strResult + "整";
             }
             else
             {
                 string strTemp = "";
                 strTemp = objConverter.m_strConvertSingleNumeric(strf[0]);
                 if (strTemp == "零")
                 {
                     strResult = strResult + strTemp;
                 }
                 else
                 {
                     strResult = strResult + strTemp + "角";
                 }

                strTemp = objConverter.m_strConvertSingleNumeric(strf[1]);
                 if (strTemp == "零")
                 {
                     strResult = strResult + "整";
                 }
                 else
                 {
                     strResult = strResult + strTemp + "分";
                 }
             }

            if (strResult[0] == '零')
             {
                 strResult = strResult.Substring(1);          //防止0.03转为"零叁分"，而直接转为"叁分"
             }

            return strResult;  
         }
         #endregion

        #region 把一个单元转为大写，如亿单元，万单元，个单元
        /// <summary>
         /// 把一个单元转为大写，如亿单元，万单元，个单元
        /// </summary>
         /// <param name="p_strNumeric">这个单元的小写数字（4位长，若不足，则前面补零）</param>
         /// <param name="p_strUnit">亿，万，元</param>
         /// <returns>转换结果</returns>
         private string m_strConvertSingleUnit(string p_strNumeric, string p_strUnit)
         {
             string strResult = string.Empty;
             if (p_strNumeric == "0000")
             {
                 return strResult;
             }
             string strTemp1 = this.m_strConvertSingleNumeric(p_strNumeric[0]);
             string strTemp2 = this.m_strConvertSingleNumeric(p_strNumeric[1]);
             string strTemp3 = this.m_strConvertSingleNumeric(p_strNumeric[2]);
             string strTemp4 = this.m_strConvertSingleNumeric(p_strNumeric[3]);

            if (strTemp1 != "零")
             {
                 strResult = strResult + strTemp1 + "仟";
             }
             else
             {
                 strResult = strResult + strTemp1;
             }

            if (strTemp2 != "零")
             {
                 strResult = strResult + strTemp2 + "佰";
             }
             else
             {
                 if (strTemp1 != "零")           //保证若有两个零'00'，结果只有一个零，下同
                    strResult = strResult + strTemp2;
             }

            if (strTemp3 != "零")
             {
                 strResult = strResult + strTemp3 + "拾";
             }
             else
             {
                 if (strTemp2 != "零")
                     strResult = strResult + strTemp3;
             }

            if (strTemp4 != "零")
             {
                 strResult = strResult + strTemp4;
             }

            if (strResult[0] == '零')            //若第一个字符是'零'，则去掉
            {
                 strResult = strResult.Substring(1);
             }
             if (strResult[strResult.Length - 1] == '零')        //若最后一个字符是'零'，则去掉
            {
                 strResult = strResult.Substring(0, strResult.Length - 1);
             }

            return strResult + p_strUnit;  
         }
         #endregion

        #region 单个数字转为大写
        /// <summary>
         /// 单个数字转为大写
        /// </summary>
         /// <param name="p_chrSingleNumeric">小写阿拉伯数字 0---9</param>
         /// <returns>大写数字</returns>
         private string m_strConvertSingleNumeric(char p_chrSingleNumeric)
         {
             string strResult = "";
             switch (p_chrSingleNumeric)
             {
                 case '0':
                     strResult = "零";
                     break;
                 case '1':
                     strResult = "壹";
                     break;
                 case '2':
                     strResult = "贰";
                     break;
                 case '3':
                     strResult = "叁";
                     break;
                 case '4':
                     strResult = "肆";
                     break;
                 case '5':
                     strResult = "伍";
                     break;
                 case '6':
                     strResult = "陆";
                     break;
                 case '7':
                     strResult = "柒";
                     break;
                 case '8':
                     strResult = "捌";
                     break;
                 case '9':
                     strResult = "玖";
                     break;
             }
             return strResult;
         }
         #endregion
     }
 }