日期轉換為中文大寫數字

動手寫一個轉換日期的小方法，雖然很短，但是需要考慮的東西還是挺多的，記錄一下。

 

 /// <summary>
    /// 將日期轉換為中文大寫
    /// 如：一九八三 十一 二十七
    /// </summary>
    public class ChineseNumberHelper
    {
        static Dictionary<int, string> _theNumOfChineseCapital = new Dictionary<int, string>() 
        {
            {0,"〇"},
            {1,"一"},
            {2,"二"},
            {3,"三"},
            {4,"四"},
            {5,"五"},
            {6,"六"},
            {7,"七"},
            {8,"八"},
            {9,"九"},
            {10,"十"}
        };

        public static string ConverToString(object number, NumberType numType)
        {
            var input = Convert.ToString(number);
            int validateInt;
            if (string.IsNullOrWhiteSpace(input) || !int.TryParse(input, out validateInt))
                throw new ArgumentException("number");

            if (validateInt == 0)
                throw new ArgumentException("number");

            //更多驗證 如果是年 月 日的輸入


            if ((numType == NumberType.Day || numType == NumberType.Day) && input.Length == 2)
                input = input.TrimStart('0');

            StringBuilder outPut = new StringBuilder();
            switch (numType)
            {
                case NumberType.Year:
                    for (int i = 0; i < input.Length; i++)
                    {
                        var intVal = Convert.ToInt32(input[i].ToString());
                        outPut.Append(_theNumOfChineseCapital[intVal]);
                    }
                    break;
                case NumberType.Moth:
                case NumberType.Day:
                    if (validateInt < 10)
                    {
                        outPut.Append(_theNumOfChineseCapital[Convert.ToInt32(input[0].ToString())]);
                    }
                    else if (validateInt == 10)
                    {
                        outPut.Append(_theNumOfChineseCapital[validateInt]);
                    }
                    else
                    {
                        if (validateInt > 19)
                            outPut.Append(_theNumOfChineseCapital[Convert.ToInt32(input[0].ToString())]);
                        outPut.Append(_theNumOfChineseCapital[10]);
                        if (input[1] != '0')
                            outPut.Append(_theNumOfChineseCapital[Convert.ToInt32(input[1].ToString())]);
                    }
                    break;
            }

            return outPut.ToString();
        }
    }

    public enum NumberType
    {
        Year,
        Moth,
        Day
    }