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据客户要求,把"2007-11-4"转换为"二〇〇七年十一月四号"using System;
 using System.Text;
 using System.Text.RegularExpressions;
 
 namespace AndyDateConvert
  {
      class DateConvert
      {
          private static DateConvert m_DateConvert = null;
 
         private char[] strChinese;
 
         private DateConvert()
         {
             strChinese = new char[] {
                 '〇','一','二','三','四','五','六','七','八','九','十'
             };
         }
 
         public static DateConvert Instance
         {
             get
             {
                 if (m_DateConvert == null)
                     m_DateConvert = new DateConvert();
                 return m_DateConvert;
             }
         }
 
         public string Baodate2Chinese(string strDate)
         {
             StringBuilder result = new StringBuilder();
 
             // 依据正则表达式判断参数是否正确
             Regex theReg = new Regex(@"(d{2}|d{4})(/|-)(d{1,2})(/|-)(d{1,2})");
             if (theReg.Match(strDate).Length != 0)
             {
                 // 将数字日期的年月日存到字符数组str中
                 string[] str = null;
                 if (strDate.Contains("-"))
                 {
                     str = strDate.Split('-');
                 }
                 else if (strDate.Contains("/"))
                 {
                     str = strDate.Split('/');
                 }
 
                 // str[0]中为年，将其各个字符转换为相应的汉字
                 for (int i = 0; i < str[0].Length; i++)
                 {
                     result.Append(strChinese[int.Parse(str[0][i].ToString())]);
                 }
                 result.Append("年");
 
                 // 转换月
                 int month = int.Parse(str[1]);
                 int MN1 = month / 10;
                 int MN2 = month % 10;
 
                 if (MN1 > 1)
                 {
                     result.Append(strChinese[MN1]);
                 }
                 if (MN1 > 0)
                 {
                     result.Append(strChinese[10]);
                 }
                 if (MN2 != 0)
                 {
                     result.Append(strChinese[MN2]);
                 }
                 result.Append("月");
 
                 // 转换日
                 int day = int.Parse(str[2]);
                 int DN1 = day / 10;
                 int DN2 = day % 10;
 
                 if (DN1 > 1)
                 {
                     result.Append(strChinese[DN1]);
                 }
                 if (DN1 > 0)
                 {
                     result.Append(strChinese[10]);
                 }
                 if (DN2 != 0)
                 {
                     result.Append(strChinese[DN2]);
                 }
                 result.Append("日");
             }
             else
             {
                 throw new ArgumentException();
             }
 
             return result.ToString();
        }static void Main(string[] args)
        {
            Console.WriteLine(DateConvert.Instance.Baodate2Chinese("2007-11-4"));
            Console.WriteLine(DateConvert.Instance.Baodate2Chinese("07-11-4"));
            Console.WriteLine(DateConvert.Instance.Baodate2Chinese("2007/11/4"));
            Console.WriteLine(DateConvert.Instance.Baodate2Chinese("07/11/4"));
        }
    }
}