复制代码 代码如下:

/// <summary>

/// 人民币大写

/// </summary>

/// <param name="input">待转换输入</param>

/// <param name="prefix">需要添加人民币前缀</param>

/// <exception cref="ArgumentException" />

/// <returns>转换后的结果</returns>

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<int, string> {

{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<string>();

var charsArray = (integerPart + decimalPart).Reverse<char>();

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

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

}

//符号处理

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<Tuple<string, string, MatchEvaluator>> patterns = new Queue<Tuple<string, string, MatchEvaluator>>();

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<string, string, MatchEvaluator>(patternBuilder.ToString(), "0", null));

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

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

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

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

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

patterns.Enqueue(Tuple.Create<string, string, MatchEvaluator>("0J|0F", "0", null));

patterns.Enqueue(Tuple.Create<string, string, MatchEvaluator>("J0?$", "JZ", null));

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

patterns.Enqueue(Tuple.Create<string, string, MatchEvaluator>(@"^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<char, string> {

{'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();

}