Question

I have little confusion in understanding, how the format is being generated for the following line.

Could any one provide me , how its renders the value in Format, With appropriate commas, being put at the right places in the figure.

writer.Write(string.Format("Your Estimated Loan Paymement+will be {0:$#,##0.00;($#,##0.00);Zero}", + this.calcPayment(this._pv,1,2) ));

Here calcPayment() is a function returns a numeric value. For example if it returns 2000.33, then it is outputed as $2,003.33.

I know it is doing the formating, but how?

Thank you.

Answer 1

Breaking down the format string: {0:$#,##0.00;($#,##0.00);Zero}

There are 3 groups:

1. $#,##0.00 – used when the argument (this.calcPayment(this._pv,1,2)
   in this case) is positive.
2. ($#,##0.00) – used when arg is negative
3. Zero – used when arg is zero

# is a digit placeholder and 0 is a zero placeholder (padding).

See this for more information.