C#实现人民币大写转换示例代码

复制代码 代码如下:

///


/// 人民币大写

///


/// 待转换输入

/// 需要添加人民币前缀

///


/// 转换后的结果

public static string ToCapital(this string input, bool prefix = false) {

    #region Step1 输入有效性验证

    if (!Regex.IsMatch(input, @"(?<=-|^)d*.?d*$"))

        throw new ArgumentException("错误的输入金额!");

    if (Regex.IsMatch(input, @"^d{25,}"))

        throw new ArgumentException("输入数据太大无法转换!");

    #endregion

    #region Step2 格式化为中间字符串

    var positionDic = new Dictionary {

        {0,"F"},{1,"J"},{2,"."},{3,"S"},{4,"B"},{5,"Q"},{6,"W"},{7,"SW"},{8,"BW"},{9,"QW"},

        {10,"Y"},{11,"SY"},{12,"BY"},{13,"QY"},{14,"WY"},{15,"SWY"},{16,"BWY"},{17,"QWY"},{18,"YY"},

        {19,"SYY"},{20,"BYY"},{21,"QYY"},{22,"WYY"},{23,"SWYY"},{24,"BWYY"},{25,"QWYY"}               

    };

    input = Regex.Replace(input, @"^.", "0.");

    var integerPart = Regex.Replace(input, @"^-|..*$", "");

    var _matchDecimal = Regex.Match(input, @".d*$", RegexOptions.None);

    var decimalPart = Regex.Replace(_matchDecimal.Success ? Convert.ToDouble(_matchDecimal.Value).ToString("0.00") : "00", @"0.", "");

    var processStack = new Stack();

    var charsArray = (integerPart + decimalPart).Reverse();

    for (int i = 0; i < charsArray.Count(); i++) {

        processStack.Push(string.Format("{0}{1}", charsArray.ElementAt(i), positionDic[i]));

    }

    //符号处理 keleyi.com

    if (Regex.IsMatch(input, "^-", RegexOptions.None)) {

        processStack.Push("-");

    }

    if (prefix) {

        processStack.Push("¥");

    }

    var process = string.Empty;

    while (processStack.Count > 0) {

        process += processStack.Pop();

    }

    //语义处理模式队列

    Queue> patterns = new Queue>();

    var patternBuilder = new StringBuilder();

    for (int i = 3; i < positionDic.Count; i++) {

        patternBuilder.AppendFormat("{0}{1}", (i == 3 ? "(0(?:" : "") + positionDic[i], i == positionDic.Count - 1 ? ")+?)+" : "|");

    }

    patterns.Enqueue(Tuple.Create(patternBuilder.ToString(), "0", null));

    patterns.Enqueue(Tuple.Create(@"(?:d+(?:QW|BW|SW|W|Q|B|S)?d?YY)+", null, m => m.Value.Replace("YY", "") + "YY"));

    patterns.Enqueue(Tuple.Create(@"(?:d+(?:QW|BW|SW|W|Q|B|S)?d?Y)+", null, m => m.Value.Replace("Y", "") + "Y"));

    patterns.Enqueue(Tuple.Create(@"(?:d+(?:Q|B|S)?d?W)+", null, m => m.Value.Replace("W", "") + "W"));

    patterns.Enqueue(Tuple.Create(@"(?!^)0+.", ".", null));

    patterns.Enqueue(Tuple.Create(@"^0.0J|^0.", "", null));

    patterns.Enqueue(Tuple.Create("0J|0F", "0", null));

    patterns.Enqueue(Tuple.Create("J0?$", "JZ", null));

    patterns.Enqueue(Tuple.Create(@".$|.0+$", ".Z", null));

    patterns.Enqueue(Tuple.Create(@"^0+$|^[^.]{0}$", "0.Z", null));

    while (patterns.Count > 0) {

        var pattern = patterns.Dequeue();

        if (pattern.Item3 != null) {

            process = Regex.Replace(process, pattern.Item1, pattern.Item3);

        }

        else {

            process = Regex.Replace(process, pattern.Item1, pattern.Item2);

        }

    }

    #endregion

    #region Step3 翻译中间字符串

    StringBuilder result = new StringBuilder();

    var translatorDic = new Dictionary {

        {'0',"零"},{'1',"壹"},{'2',"贰"},{'3',"叁"},{'4',"肆"},{'5',"伍"},{'6',"陆"},{'7',"柒"},{'8',"捌"},{'9',"玖"},

        {'S',"拾"},{'B',"佰"},{'Q',"仟"},{'W',"萬"},{'Y',"亿"},

        {'¥',"人民币"},{'-',"负"},{'.',"圆"},{'J',"角"},{'F',"分"},{'Z',"整"}

    };

    for (int i = 0; i < process.Length; i++) {

        result.Append(translatorDic[process[i]]);

    }

    #endregion

    return result.ToString();

}

0.225400s