贴段最近在项目中用到的一个函数.
因涉及到财务，需要把数字符转换成大写人民币汉字，于是自己动手写了一个，使用的算法比较笨，各位看客不要笑啊.
可转换数字大小在10亿以下，超过的，就无能为力了,不过大家可以自己扩充它.

// Created By 小点 at 2008-5-3
// QQ:28043566  Email:whhq84#163.com(发邮件时请换#为@)
// 大家可随意转载,更欢迎与我交流！

/// <summary>
/// 将数字转换成大写人民币
/// </summary>
/// <param name="v">要转换的数字字符串</param>
/// <returns>转换后的大写人民币字符串</returns>
private static string Num2Char(string var)
{
 string retval = "";
 bool IsPoint = false;
 double v = double.Parse(var);
 if (v > 0)
 {
  char[] chars = v.ToString().ToCharArray();
  foreach (char c in chars)
  {
   IsPoint = false;
   switch (c)
   {
    case '1': retval += "壹"; break;
    case '2': retval += "贰"; break;
    case '3': retval += "叁"; break;
    case '4': retval += "肆"; break;
    case '5': retval += "伍"; break;
    case '6': retval += "陆"; break;
    case '7': retval += "柒"; break;
    case '8': retval += "捌"; break;
    case '9': retval += "玖"; break;
    case '0': retval += "零"; break;
    default: IsPoint = true; break;
   }
   if (!IsPoint)
   {
    v = v / 10;
    if (v > 0.001 && v < 0.009999999999)
    {
     retval += "分";
    }
    else if (v > 0.01 && v < 0.099999999999)
    {
     retval += "角";
    }
    else if (v > 0.1 && v < 0.999999999999)
    {
     retval += "元";
    }
    else if (v > 1 && v < 9.999999999999)
    {
     retval += "拾";
    }
    else if (v > 10 && v < 99.999999999999)
    {
     retval += "佰";
    }
    else if (v > 100 && v < 999.999999999999)
    {
     retval += "仟";
    }
    else if (v > 1000 && v < 9999.999999999999)
    {
     retval += "万";
    }
    else if (v > 10000 && v < 99999.999999999999)
    {
     retval += "拾";
    }
    else if (v > 100000 && v < 999999.999999999999)
    {
     retval += "佰";
    }
    else if (v > 1000000 && v < 9999999.999999999999)
    {
     retval += "仟";
    }
    else if (v > 10000000 && v < 99999999.999999999999)
    {
     retval += "亿";
    }
   }
  }
 }
 else
 {
  retval = "零";
 }
 return retval;
}