how to convert string to decimal number while maintaining the decimal places in C#

Question

In C#, I have a custom string "12.10", when I convert it to decimal it is converted as 12.1 but I need it to be 12.10 in decimal also, please help

Below is the code

 string Value = nudEngineeringYears.Value + "." + nudEngineeringMonths.Value;
 selStaff.EngineeringExperience = Convert.ToDecimal(Value);

I don't understand, a decimal 12.10 is exactly the same as a decimal 12.1 — L-Four, Jan 27 '15 at 10:55
Leading and trailing zeroes are only a concern for a text representation. When it's in binary form (ie `decimal`) this has no meaning. — H H, Jan 27 '15 at 10:59

score 2 · Answer 1 · answered Jan 27 '15 at 10:57

2

There is no difference between a decimal with value 12.1 or value 12.10.

If you want to display the decimal with 2 decimal place, specify a format string in ToString:

myDouble.ToString("0.00");

answered Jan 27 '15 at 10:57

Rik

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score 1 · Answer 2 · answered Jan 27 '15 at 10:56

1

Well, as math stays

12.1 == 12.10 == 12.100 == ...

etc. However, you can change number's representation as a string by formatting:

  12.1.ToString("F2"); // <- return 12.10 (note "2" in formatting string)
  12.1.ToString("F3"); // <- return 12.100 etc.

answered Jan 27 '15 at 10:56

Dmitry Bychenko

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score 1 · Answer 3 · answered Jan 27 '15 at 10:59

There's no decimal 12.10, only 12.1.

What you're talking about when you say 12.10 is a possible representation of that value.

There's no difference between 12.10 and 12.1 when talking about numbers, but there's a difference between the string "12.10" and the string "12.1".

So don't confuse a number with its representation (which typically only matters in the front end).

If you want to format your value, you create a string representation of it. See Standard Numeric Format Strings.

score 1 · Answer 4 · answered Jan 27 '15 at 11:00

You seem to confuse the internal/binary representation of a floating point number with its representation when converted to a string.

Internally a float has always about seven places of precission, a double about 15 places of precission, a decimal even more.

Only when you format such a binary value to a string you may specify the number of places shown. For formatting use .ToString(format) with the format you need. in your case "F2"

how to convert string to decimal number while maintaining the decimal places in C#

4 Answers4