C# 日期转换为大写

//把数字转换为大写


private string numtoUpper(int num)




...{


String str=num.ToString();


string rstr = "";


int n;


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




...{


n =Convert.ToInt16(str[i].ToString());//char转数字,转换为字符串，再转数字


switch (n)




...{


case 0:rstr=rstr+"〇";break;


case 1:rstr=rstr+"一";break;


case 2:rstr=rstr+"二";break;


case 3:rstr=rstr+"三";break;


case 4:rstr=rstr+"四";break;


case 5:rstr=rstr+"五";break;


case 6:rstr=rstr+"六";break;


case 7:rstr=rstr+"七";break;


case 8:rstr=rstr+"八";break;


default:rstr=rstr+"九";break;






}




}


return rstr;


}


//月转化为大写


private string monthtoUpper(int month)




...{


if (month < 10)




...{


return numtoUpper(month);


}


else




if (month == 10) ...{ return "十"; }




else




...{


return "十" + numtoUpper(month - 10);


}


}


//日转化为大写


private string daytoUpper(int day)




...{


if (day < 20)




...{


return monthtoUpper(day);


}


else




...{


String str = day.ToString();


if (str[1] == '0')




...{


return numtoUpper(Convert.ToInt16(str[0].ToString()))+"十" ;




}






else




...{


return numtoUpper(Convert.ToInt16(str[0].ToString())) + "十"


+ numtoUpper(Convert.ToInt16(str[1].ToString()));


}


}


}


//日期转换为大写


private string dateToUpper(System.DateTime date)




...{


//by 闫磊 Email:Landgis@126.com,yanleigis@21cn.com 2007.10.25


int year = date.Year;


int month = date.Month;


int day = date.Day;


return numtoUpper(year) + "年" + monthtoUpper(month) + "月" + daytoUpper(day) + "日";




}


调用方法: MessageBox.Show(dateToUpper(System.DateTime.Today));