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C# 数字转换成大写
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/// <summary>
/// 数字转大写
/// </summary>
/// <param name="Num">数字</param>
/// <returns></returns>
public static string CmycurD(decimal num)
{
string str1 = "零壹贰叁肆伍陆柒捌玖"; //0-9所对应的汉字
string str2 = "万仟佰拾亿仟佰拾万仟佰拾元角分"; //数字位所对应的汉字
string str3 = ""; //从原num值中取出的值
string str4 = ""; //数字的字符串形式
string str5 = ""; //人民币大写金额形式
int i; //循环变量
int j; //num的值乘以100的字符串长度
string ch1 = ""; //数字的汉语读法
string ch2 = ""; //数字位的汉字读法
int nzero = ; //用来计算连续的零值是几个
int temp; //从原num值中取出的值 num = Math.Round(Math.Abs(num), ); //将num取绝对值并四舍五入取2位小数
str4 = ((long)(num * )).ToString(); //将num乘100并转换成字符串形式
j = str4.Length; //找出最高位
if (j > ) { return "溢出"; }
str2 = str2.Substring( - j); //取出对应位数的str2的值。如：200.55,j为5所以str2=佰拾元角分 //循环取出每一位需要转换的值
for (i = ; i < j; i++)
{
str3 = str4.Substring(i, ); //取出需转换的某一位的值
temp = Convert.ToInt32(str3); //转换为数字
if (i != (j - ) && i != (j - ) && i != (j - ) && i != (j - ))
{
//当所取位数不为元、万、亿、万亿上的数字时
if (str3 == "")
{
ch1 = "";
ch2 = "";
nzero = nzero + ;
}
else
{
if (str3 != "" && nzero != )
{
ch1 = "零" + str1.Substring(temp * , );
ch2 = str2.Substring(i, );
nzero = ;
}
else
{
ch1 = str1.Substring(temp * , );
ch2 = str2.Substring(i, );
nzero = ;
}
}
}
else
{
//该位是万亿，亿，万，元位等关键位
if (str3 != "" && nzero != )
{
ch1 = "零" + str1.Substring(temp * , );
ch2 = str2.Substring(i, );
nzero = ;
}
else
{
if (str3 != "" && nzero == )
{
ch1 = str1.Substring(temp * , );
ch2 = str2.Substring(i, );
nzero = ;
}
else
{
if (str3 == "" && nzero >= )
{
ch1 = "";
ch2 = "";
nzero = nzero + ;
}
else
{
if (j >= )
{
ch1 = "";
nzero = nzero + ;
}
else
{
ch1 = "";
ch2 = str2.Substring(i, );
nzero = nzero + ;
}
}
}
}
}
if (i == (j - ) || i == (j - ))
{
//如果该位是亿位或元位，则必须写上
ch2 = str2.Substring(i, );
}
str5 = str5 + ch1 + ch2; if (i == j - && str3 == "")
{
//最后一位（分）为0时，加上“整”
str5 = str5 + '整';
}
}
if (num == )
{
str5 = "零元整";
}
return str5;
}
