使用C#实现阿拉伯数字到大写中文的转换_C#教程

 先记下来,以备后用!

  /// <summary>
  /// 金额转为大写金额
  /// </summary>
  public class MoneyConvertChinese
  {
    /// <summary>
    /// 金额转为大写金额
    /// </summary>
    /// <param name="LowerMoney"></param>
    /// <returns></returns>
    public string MoneyToChinese(string LowerMoney)
    {
      string functionReturnValue = null;
      bool IsNegative = false; // 是否是负数
      if (LowerMoney.Trim().Substring(0, 1) == "-")
      {
        // 是负数则先转为正数
        LowerMoney = LowerMoney.Trim().Remove(0, 1);
        IsNegative = true;
      }
      string strLower = null;
      string strUpart = null;
      string strUpper = null;
      int iTemp = 0;
      // 保留两位小数 123.489→123.49　　123.4→123.4
      LowerMoney = Math.Round(double.Parse(LowerMoney), 2).ToString();
      if (LowerMoney.IndexOf(".") > 0)
      {
        if (LowerMoney.IndexOf(".") == LowerMoney.Length - 2)
        {
          LowerMoney = LowerMoney + "0";
        }
      }
      else
      {
        LowerMoney = LowerMoney + ".00";
      }
      strLower = LowerMoney;
      iTemp = 1;
      strUpper = "";
      while (iTemp <= strLower.Length)
      {
        switch (strLower.Substring(strLower.Length - iTemp, 1))
        {
          case ".":
            strUpart = "圆";
            break;
          case "0":
            strUpart = "零";
            break;
          case "1":
            strUpart = "壹";
            break;
          case "2":
            strUpart = "贰";
            break;
          case "3":
            strUpart = "叁";
            break;
          case "4":
            strUpart = "肆";
            break;
          case "5":
            strUpart = "伍";
            break;
          case "6":
            strUpart = "陆";
            break;
          case "7":
            strUpart = "柒";
            break;
          case "8":
            strUpart = "捌";
            break;
          case "9":
            strUpart = "玖";
            break;
        }

        switch (iTemp)
        {
          case 1:
            strUpart = strUpart + "分";
            break;
          case 2:
            strUpart = strUpart + "角";
            break;
          case 3:
            strUpart = strUpart + "";
            break;
          case 4:
            strUpart = strUpart + "";
            break;
          case 5:
            strUpart = strUpart + "拾";
            break;
          case 6:
            strUpart = strUpart + "佰";
            break;
          case 7:
            strUpart = strUpart + "仟";
            break;
          case 8:
            strUpart = strUpart + "万";
            break;
          case 9:
            strUpart = strUpart + "拾";
            break;
          case 10:
            strUpart = strUpart + "佰";
            break;
          case 11:
            strUpart = strUpart + "仟";
            break;
          case 12:
            strUpart = strUpart + "亿";
            break;
          case 13:
            strUpart = strUpart + "拾";
            break;
          case 14:
            strUpart = strUpart + "佰";
            break;
          case 15:
            strUpart = strUpart + "仟";
            break;
          case 16:
            strUpart = strUpart + "万";
            break;
          default:
            strUpart = strUpart + "";
            break;
        }

        strUpper = strUpart + strUpper;
        iTemp = iTemp + 1;
      }

      strUpper = strUpper.Replace("零拾", "零");
      strUpper = strUpper.Replace("零佰", "零");
      strUpper = strUpper.Replace("零仟", "零");
      strUpper = strUpper.Replace("零零零", "零");
      strUpper = strUpper.Replace("零零", "零");
      strUpper = strUpper.Replace("零角零分", "整");
      strUpper = strUpper.Replace("零分", "整");
      strUpper = strUpper.Replace("零角", "零");
      strUpper = strUpper.Replace("零亿零万零圆", "亿圆");
      strUpper = strUpper.Replace("亿零万零圆", "亿圆");
      strUpper = strUpper.Replace("零亿零万", "亿");
      strUpper = strUpper.Replace("零万零圆", "万圆");
      strUpper = strUpper.Replace("零亿", "亿");
      strUpper = strUpper.Replace("零万", "万");
      strUpper = strUpper.Replace("零圆", "圆");
      strUpper = strUpper.Replace("零零", "零");

      // 对壹圆以下的金额的处理
      if (strUpper.Substring(0, 1) == "圆")
      {
        strUpper = strUpper.Substring(1, strUpper.Length - 1);
      }
      if (strUpper.Substring(0, 1) == "零")
      {
        strUpper = strUpper.Substring(1, strUpper.Length - 1);
      }
      if (strUpper.Substring(0, 1) == "角")
      {
        strUpper = strUpper.Substring(1, strUpper.Length - 1);
      }
      if (strUpper.Substring(0, 1) == "分")
      {
        strUpper = strUpper.Substring(1, strUpper.Length - 1);
      }
      if (strUpper.Substring(0, 1) == "整")
      {
        strUpper = "零圆整";
      }
      functionReturnValue = strUpper;

      if (IsNegative == true)
      {
        return "负" + functionReturnValue;
      }
      else
      {
        return functionReturnValue;
      }
    }
  }

测试代码：

    static void Main(string[] args)
    {
      Console.Write("请输入要转成大写的数字：");
      string str = Console.ReadLine();
      Console.WriteLine("大写：" + new MoneyConvertChinese().MoneyToChinese(str));
      Console.ReadLine();
    }

测试结果：

下面是其它网友的补充：

using System; 

namespace ConsoleApp
{
/// <summary>
/// 本类实现阿拉伯数字到大写中文的转换
/// 该类没有对非法数字进行判别
/// 请调用NumToChn方法
/// </summary>
public class NumFormat
{
 public NumFormat()
 {
 //
 // TODO: 在此处添加构造函数逻辑
 //
 } 

 // 转换数字
 private char ToNum(char x)
 {
 string strChnNames="零一二三四五六七八九";
 string strNumNames="0123456789";
 return strChnNames[strNumNames.IndexOf(x)];
 } 

 // 转换万以下整数
 private string ChangeInt(string x)
 {
 string[] strArrayLevelNames=new string[4] {"","十","百","千"};
 string ret = "";
 int i;
 for (i=x.Length-1;i>=0;i--)
 if (x[i] == '0')
  ret = ToNum(x[i]) + ret;
 else
  ret = ToNum(x[i]) + strArrayLevelNames[x.Length-1-i] + ret;
 while ((i=ret.IndexOf("零零"))!=-1)
 ret=ret.Remove(i, 1);
 if (ret[ret.Length-1]=='零' && ret.Length>1)
 ret=ret.Remove(ret.Length-1,1);
 if (ret.Length>=2 && ret.Substring(0,2)=="一十")
 ret=ret.Remove(0,1);
 return ret;
 } 

 // 转换整数
 private string ToInt(string x)
 {
 int len = x.Length;
 string ret,temp;
 if (len<=4)
 ret = ChangeInt(x);
 else if (len<=8)
 {
 ret = ChangeInt(x.Substring(0,len-4)) + "万";
 temp = ChangeInt(x.Substring(len-4,4));
 if (temp.IndexOf("千")==-1 && temp!="")
  ret += "零" + temp;
 else
  ret += temp;
 }
 else
 {
 ret=ChangeInt(x.Substring(0,len-8)) + "亿";
 temp=ChangeInt(x.Substring(len-8,4));
 if (temp.IndexOf("千")==-1 && temp!="")
  ret += "零" + temp;
 else
  ret += temp;
 ret += "万";
 temp = ChangeInt(x.Substring(len-4,4));
 if (temp.IndexOf("千")==-1 && temp!="")
  ret += "零" + temp;
 else
  ret += temp;
 }
 int i;
 if ((i=ret.IndexOf("零万"))!=-1)
 ret = ret.Remove(i+1,1);
 while ((i=ret.IndexOf("零零"))!=-1)
 ret = ret.Remove(i,1);
 if (ret[ret.Length-1]=='零' && ret.Length>1)
 ret = ret.Remove(ret.Length-1,1);
 return ret;
 } 

 private string ToDecimal(string x)
 {
 string ret="";
 for (int i=0;i<x.Length;i++)
 ret += ToNum(x[i]);
 return ret;
 } 

 public string NumToChn(string x)
 {
 if (x.Length==0)
 return "";
 string ret="";
 if (x[0]=='-')
 {
 ret="负";
 x=x.Remove(0,1);
 }
 if (x[0].ToString()==".")
 x="0"+x;
 if (x[x.Length-1].ToString()==".")
 x=x.Remove(x.Length-1,1);
 if (x.IndexOf(".")>-1)
 ret += ToInt(x.Substring(0,x.IndexOf(".")))+"点"+ToDecimal(x.Substring(x.IndexOf(".")+1));
 else
 ret += ToInt(x);
 return ret;
 }
}
}

测试工程

using System; 

namespace ConsoleApp
{
class MainClass
{
 static void Main(string[] args)
 {
 /*
 System.Console.WriteLine("Hello, The World!"); 

 System.Console.WriteLine("My Love!"); 

 ClassTest ct = new ClassTest();
   System.Console.WriteLine(ct.Get_Str());
 */ 

 /*
 // 重载运算符
   MyVector v1 = new MyVector(5, 12);
 MyVector v2 = new MyVector(4, 3);
 MyVector v3 = new MyVector();
 v3 = v1 + v2;
 System.Console.WriteLine("{0}测试一下", v3.Length);
 */ 

 // 转换成大写数字
 NumFormat nf = new NumFormat();
 string x;
 while (true)
 {
 Console.Write("X=");
 x = Console.ReadLine();
 if (x == "") break;
 Console.WriteLine("{0}={1}", x, nf.NumToChn(x));
 }
 }
}
} 

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