C# 数字大写转换

 

 

private void button1_Click(object sender, EventArgs e)

{

　　textBox2.Text = ConvertNumberToChinese(Convert.ToDouble(textBox1.Text));

}

 

/// <summary>
/// 根据给定的数值转换成汉字大写格式
/// </summary>
/// <param name="pSourceNumber">数值</param>
/// <returns></returns>
public static string ConvertNumberToChinese(double pSourceNumber)
{
string result;
if (pSourceNumber <= 0)
result = "零";
else
{
result = Num(pSourceNumber);
}
result += result.IndexOf("点", StringComparison.Ordinal) < 0 ? "正" : "";
return result;
}

public static string Num(double num)
{
try
{
string str = string.Empty;
if (num.ToString().IndexOf('.') >= 0)
{
string[] strNum = num.ToString().Split('.');
str = NumToBig(strNum[0]);
str += "点";
str += NumToSmall(strNum[1]);
}
else
str = NumToBig(num.ToString());
return str;
}
catch (Exception ex)
{
throw ex;
}
}

/// <summary>
/// 组合成大写数字
/// </summary>
/// <param name="num"></param>
/// <returns></returns>
private static string NumToBig(string num)
{
string str = "", strUnit = "", strZi = "零";
for (int i = 0; i < num.Length; i++)
{
if (str.Length >= 1)
{
if (!str.Substring(str.Length - 1, 1).Equals(strZi))
str += GetCapital(num[i]);
else if (!num[i].Equals('0'))
str += GetCapital(num[i]);
}
else
{
str += GetCapital(num[i]);
}
if (!str.Substring(str.Length - 1, 1).Equals(strZi))//不是零后面就要有数字单位
str += GetUnitName(num.Length - i);
else if (num.Length - i == 5 && num.Length > 5) //判断万字的位置
{
if (str.Substring(str.Length - 1, 1).Equals(strZi))
{
str = str.Substring(0, str.Length - 1);
strUnit = strZi;
}
if (!str.Substring(str.Length - 1, 1).Equals("亿")) //如果是亿，后面就不要跟万字
str += GetUnitName(num.Length - i);
if (!string.IsNullOrEmpty(strUnit))
{
if (!strUnit.Equals(strZi))
str += strUnit;
strUnit = "";
}
}
else if (num.Length - i == 9)//判断亿字的位置
{
if (!str.Substring(str.Length - 1, 1).Equals(strZi))
str += GetUnitName(num.Length - i);
else
str = str.Substring(0, str.Length - 1) + GetUnitName(num.Length - i);
}
}
//最后有零就去掉
if (str.Substring(str.Length - 1, 1).Equals(strZi))
str = str.Substring(0, str.Length - 1);
return str;
}

private static string NumToSmall(string num)
{
string str = "", strZi = "零";
for (int i = 0; i < num.Length; i++)
{
if (str.Length >= 1)
{
if (!str.Substring(str.Length - 1, 1).Equals(strZi))
str += GetCapital(num[i]);
else if (!num[i].Equals('0'))
str += GetCapital(num[i]);
}
else
str += GetCapital(num[i]);
}
//最后有零就去掉
if (str.Substring(str.Length - 1, 1).Equals(strZi))
str = str.Substring(0, str.Length - 1);
return str;
}
private static string GetUnitName(int numLength)
{
string str = string.Empty;
switch (numLength)
{
case 2:
case 6:
case 10:
str = "拾";
break;
case 3:
case 7:
case 11:
str = "佰";
break;
case 4:
case 8:
case 12:
str = "仟";
break;
case 5:
case 13:
str = "萬";
break;
case 9:
str = "亿";
break;
default:
break;
}
return str;
}
private static string GetCapital(char c)
{
var result = string.Empty;
switch (c)
{
case '0':
result = "零";
break;
case '1':
result = "壹";
break;
case '2':
result = "贰";
break;
case '3':
result = "叁";
break;
case '4':
result = "肆";
break;
case '5':
result = "伍";
break;
case '6':
result = "陆";
break;
case '7':
result = "柒";
break;
case '8':
result = "捌";
break;
case '9':
result = "玖";
break;
}
return result;
}