如何在整数中放置小数点

Question

我正在从银行读取带有一串数字的文本文件。 0000000010050，这个字符串的金额是$100.50，但是有没有办法在字符串中插入小数点呢？这是我的代码。

string amount = 0000000010050; 
string f_amount = "";
string ff_amount = "";
decimal d_amount = 0;

f_amount = amount.Trim();
d_amount = int.Parse(f_amount.TrimStart('0')); // this part removes the zeros and the output is 10050.
ff_amount = string.Format("{0:0,0.00}", d_amount); // this line outputs 10050.00

如何使输出看起来像这样100.50?

Answer 1

类似这样的事情（让我们考虑 CultureInfo）

  using System.Globalization;

  ... 

  string amount = "0000000010050";

  amount = amount
    .Insert(amount.Length - CultureInfo.CurrentCulture.NumberFormat.CurrencyDecimalDigits,
            CultureInfo.CurrentCulture.NumberFormat.CurrencyDecimalSeparator)
    .TrimStart('0');

Answer 2

先把字符串转成十进制，这样应用string.Format

string.Format("{0:#.00}", Convert.ToDecimal(bankString) / 100);

这将给出结果 100.50

https://dotnetfiddle.net/WrRVFo