This question already has answers here:
Two Decimal places using c#
(13 answers)
Closed 6 years ago.
I've retrieved a decimal value from database as a string:
string get_amt = dt_.Rows[i]["billing_amt"].ToString();
Values of billing_amt are 100.0000, 150.0000, 0.0000.
I tried to display the value of get_amt rounding up to two decimal places using the code:
string.Format("{0:0.00}", get_amt)
but it is not working. How can I show the value of get_amt as 100.00 or 150.00? Please suggest.
You'll probably want to try something like:
double get_amt = 0;
if (dt_.Rows[i]["billing_amt"] != DBNull.Value)
get_amt = Convert.ToDouble(dt_.Rows[i]["billing_amt"]);
Then:
string.Format("{0:0.00}", get_amt)
should work.
It's currently not working as it's a string value your trying to format - which wont have decimal places.
Strictly speaking, you could use Regex to cut the string down to a 2 decimal point number like so:
string formatted = Regex.Match(unformattedString, #"^-?\d+\.\d{2}").Value;
That being said, you almost never want to use a string to hold number information. It's a bother and a pain to get them to do what you want. It's much more advisable to store them as either a double or a decimal, then convert to string only when you have to.
Related
This question already has answers here:
Formatting a float to 2 decimal places
(9 answers)
C# How to format a double to one decimal place without rounding
(6 answers)
Closed 11 months ago.
This is what I want to do:
if a double field has more than 3 decimal places then it should convert to 3 decimal figures and if no decimal places are present then it should convert to 3 decimals
e.g 12.878999 -> 12.878
120 -> 120.000
I cannot use string.Format() as I want the double field to stay double.
The first example requires Math.Round, eg Math.Round(d,3,MidPointRounding.ToZero).
The second isn't meaningful. Trailing decimal zeroes aren't significant. In the real types (float, double) they don't affect the storage of the number. The call Math.Round(120d, 3, MidpointRounding.AwayFromZero) will print 120 without a format string.
Displaying a double with three trailing zeroes is a formatting operation.
Update
From the comments it appears the actual problem is how to format a report sum in DevExpress Reports. All report engines allow specifying a format for fields and cells.
The Format Data page in the DevExpress Reports docs shows how to modify the FormatString property for a specific value
You can use Math.Round to achieve it
var value = Math.Round(12.878999, 3, MidpointRounding.ToZero);
For the integer type, you can do it this way
var value = 129 + 0.000m; //extend 3 decimals for an integer number
This question already has answers here:
C# Double - ToString() formatting with two decimal places but no rounding
(15 answers)
Closed 1 year ago.
I would like to have it round up to 100 using stringformat, not math.round because the way in the code I can't use math.round.
If you set your precision to a single digit like this, the number will be rounded up to 100.0. You can use string interpolation and not have to specify String.Format like this:
Console.WriteLine($"{99.99:0.0}");
If you want to round the number to the nearest integer, you can try:
var str = string.Format("{0:.}", 99.99); // Will return "100"
If you want to always have one digit after the delimiter, you can change it to:
var str = string.Format("{0:.0}", 99.99); // Will return "100.0"
You can always check the official documentation for the entire set of options:
String.Format Method
This question already has answers here:
Convert from scientific notation string to float in C#
(2 answers)
Closed 1 year ago.
I'm stuck with a problem and I have to display these numbers correctly using the power of ten.
I know that the number in the end has to do with the fact that the decimal point is shifted the number to the right, only how I can do it or how I have to parse the number is a mystery to me.
I have the numbers as a string
The whole thing is written in C #
"1.11632e+007"
"1.30357e+008"
The result must look like this
The output can be as int or string does not matter
11163200
130357000
I have no idea how to do this. Can you help me?
the internal representation of a float is in binary, and there is nothing you can do about it.
If you want to print a float avoiding the scientific notation even for huge numbers it's something like
Console.WriteLine(x.ToString("F"));
Assuming you are trying to parse it, System.Globalization.NumberStyles.Float should help:
var parsed = decimal.Parse("1.11632e+007", System.Globalization.NumberStyles.Float);
Console.WriteLine(parsed); // outputs "11163200"
This question already has answers here:
c# float [] average loses accuracy
(3 answers)
Why is my number being rounded incorrectly?
(5 answers)
Closed 5 years ago.
I'm having some trouble to convert data taken in my database to float numbers. Basically, the application is rounding one of my values to one decimal house. The table contains a set of fields with monetary values and one of these values te application keeps rounding. The strangest thing is that, despite the fact that there are more float values on my database, just one of them is rounded (valorAtualizadoAcordo). So, this is my query:
SELECT
idAcordo,
tipoAcordo,
valorAtualizadoAcordo,
dataAtualizacaoAcordo,
valorConfessadoAcordo,
valorAcordo,
valorEntradaAcordo,
valorParceladoAcordo,
quantidadeParcelasAcordo,
taxaAcordo,
atualizacaoTrAcordo,
dataPrimeiraParcelaAcordo,
dataUltimaParcelaAcordo,
dataAssinaturaAcordo,
dataAprovacaoAcordo,
primeiraDataAbertoAcordo,
dataProtocoloAcordo,
tipoProtocoloAcordo,
cadastroDspsAcordo,
dataSolicitacaoAcordo,
contabilizadoAcordo,
dataLancamentoAcordo,
contratoDevolvidoAcordo,
dataDevolucaoAcordo,
volumetriaAcordo,
pagamentoRealizadoDataAcordo,
contratoAntesAjuizamentoDataAcordo
FROM
acordo
WHERE
FK_idContrato = 46;
And this is my convertion:
ac.setValor(float.Parse(acd.Rows[i][5].ToString(), CultureInfo.InvariantCulture));
The value I'm trying to retrieve from the database is 325,360.69. I'm converting it to PT-BR format, what gives me "325360,7" (in Brazil, we use "," instead of "." to define the decimal floating point).
Not sure why you think making a string from a float and back is a good idea, but I would start by dropping the ToString. The use a cast or a real conversion method like convert.ToFloat:
float f = (float)acd.Rows[i][5];
Or:
float f = Convert.ToFloat(acd.Rows[i][5]);
This question already has answers here:
C# Double - ToString() formatting with two decimal places but no rounding
(15 answers)
Closed 8 years ago.
I want to convert following 3 double values to string.
Double value converted string value
1 1
1.200 1.200
1.666 1.666
I want my output string values in same format as double. Means in above values 1 doesn't have any decimal value, so it will remain same. In case of 1.200 it will give me string as 1.200 and same for 1.666. However I tried .ToString() method but it truncated the ZERO value for 1.200 value. But i don't want this. I want Actual values in string format.
I admit that I don't like the idea of doing this, but I wrote an extension method for the Double type to format it. Feel free to change the funny names. :)
public static class StupidDouble
{
public static string StupidFormat(this double theValue)
{
// geth the double value to three decimal points
string s = string.Format("{0:0.000}", theValue);
// get the whole number value
int check = (int) Math.Truncate(theValue);
// if the format of the int matches the double, display without decimal places
if (string.Format("{0:0.000}", check) == s)
{
s = check.ToString();
}
return s;
}
}
C#, or any other language (including SQL), does not make differences in the values of floating-point types (float, double) based on their representation in your code.
This means that the compiler does not make a difference between:
double v1 = 1;
and
double v2 = 1.000;
Neither does the database where you say (in the comments) you get these values from.
The reason databases display decimals in a certain way is because of a pre-defined formatting applied to the result set. This could either be defined by the database tool you use, or depend on your locale system settings. Anyway, the .NET framework provides you with capabilities to explicitly format your data.
You need to decide which formatting suits your needs best an use it. For instance this will format the number with 4 decimal places after the dot:
String.Format("{0:0.0000}", v1); // outputs 1.0000
String.Format("{0:0.0000}", v2); // outputs 1.0000 too
If you already know your desired format, adjust the formatting string (the first argument that looks like "{0:0000}" in a way that best corresponds to your requirements.