Format string % without multiply the value by 100 - c#

I need to format the string as % but the user will enter the number already as %
i.e user enter 10, I need to show 10%
I tried {0:P} and {0:0%} but it always multiply the user number by 100
How can I simply add "%" to the input number without multiply it by 100 in the format {0:}?

You have two real options, add the % by hand
String.Format("Example: {0}%", userValue);
or devide the user number by 100 before you display it.
String.Format("Example: {0:P}", userValue / 100.0); //don't just do "100" or you will get errors from integer division if userValue is a int.

Can't you just append %:
userEnteredNumber.ToString() + "%";

What about
var showString = userInput + "%";
Then display showString wherever you need to show.

We use this format for formatting int value to percent without multipying by 100.
intPercent.ToString(#"0\%");

Related

Show double as percentage without decimals with ToString method

Looking for:
95,4545454545455 -> 95 %
I tried using:
String resultAsPercentage = result.ToString("##0 %");
But, it shows
9545 %
Then, I solved my problem using regex:
Question: Why my ToString method hasn't worked? And how to fix it to avoid using regex?
Thanks in advance.
As documented on Custom Numeric Format Strings, the % modifier multiplies the value by 100 before inserting the %. It's intended to be used with fractions. To disable this special meaning of %, escape it by preceding it with #"\".
Alternatively, you could take the % out of the format string, and append it manually: result.ToString("##0") + " %".
If you don't care about rounding, you can use the following:
double result = 95.4545454545;
String resultAsPercentage = (int)result + " %";
System.out.println(resultAsPercentage);
Output is: 95 %
Casting to an int drops the decimal places without rounding
You can use thew P(ercentage) format specifier, you need to divide through 100 because the specifier multiplies it by 100:
decimal value = 95.4545454545455m;
String resultAsPercentage = (value / 100).ToString("P0"); // 95%
If you need the space between the value and the percentage symbol you could use this approach:
NumberFormatInfo nfi = (NumberFormatInfo)NumberFormatInfo.CurrentInfo.Clone();
nfi.PercentSymbol = " %";
String resultAsPercentage = (value / 100).ToString("P0", nfi); // 95 %
One way can be Clone a culture (like InvariantCulture), set it's PercentPositivePattern to 0, divide your value by 100 and get it's string representation using The percent ("P") format specifier with 0 precision and that cloned culture as;
var clone = (CultureInfo)CultureInfo.InvariantCulture.Clone();
clone.NumberFormat.PercentNegativePattern = 0;
Console.WriteLine(((int)95.4545454545455 / 100.0).ToString("P0", clone)); // 95 %
You can see all associated patterns on Remarks section on that page.
You can guaranteed to set PercentNegativePattern property as well for negative values.

Converting string/int to double in C#

Here is a simple calculator, to calculate how much candy you can get when dividing the kilogram price with the money you have allocated for candy.
In example: "Candy costs 5$ a kilo. I have 3.50$ allocated for candy. I would use this program to calculate the amount of candy I get."
It works fine until using decimals. I want to convert the string to Double so I can use decimals with the calculator. 4$ kilo price and 8$ money of course results to 2 kilos of candy. But if the kilo price was 4.80$ and I had 9.30$ money, I would only get an error and cause the command prompt to crash.
static void Main(string[] args)
{
//The variables
int int1;
int int2;
string text1;
string text2;
//The actual calculation
System.Console.Write("Please input the kilogram price of candy: ");
text1 = System.Console.ReadLine();
int1 = int.Parse(text1);
System.Console.Write("Please input the money allocated for candy ");
text2 = System.Console.ReadLine();
int2 = int.Parse(text2);
System.Console.WriteLine("With the amount of money you input you would get " + (int2 / int1) + " kilos of candy.");
}
}
}
You're using int variable types, which can only contain integer numbers, i.e. "whole" numbers without decimals, such as 1 and 42. As soon as you want to use decimals, you'll need a variable type that can support this.
C# has a few of those built in: float, double and decimal. Given you're working with monetary data, where precision and accuracy are very important, you must use decimal.
You also want to use the bool-returning TryParse() as opposed to the exception-throwing Parse() method.
So change your code to use decimal and decimal.TryParse():
decimal pricePerKilogram;
string input = Console.ReadLine();
if (!decimal.TryParse(input, out pricePerKilogram))
{
// show error or retry
}
You need to parse your inputs from decimal, not int. Here, try it this way:
System.Console.Write("Please input the kilogram price of candy: ");
decimal pricePerKilo = decimal.Parse(System.Console.ReadLine());
System.Console.Write("Please input the money allocated for candy ");
decimal amountAllocatedForCandy = decimal.Parse(System.Console.ReadLine());
System.Console.WriteLine("With the amount of money you input you would get " + (amountAllocatedForCandy / pricePerKilo) + " kilos of candy.");
System.Console.Read();
An int is a type that can only store whole numbers -- i.e. no fractional component/decimal digits -- which is why you got an error when you tried to parse a string number with decimal digits into an int. A decimal, on the other hand, is used to store numbers with fractional components.
Each type has its uses: you would never want to store, say, number of candy pieces using a decimal since that can only be a whole number. Doing so could lead to unnecessary confusion for future maintainers of your code and could lead to bugs that are hard to find.
that is because 4.80 or 9.30 is not integer.
double double1;
double double2;
string text1;
string text2;
//The actual calculation
System.Console.Write("Please input the kilogram price of candy: ");
text1 = System.Console.ReadLine();
double1 = double.Parse(text1);
System.Console.Write("Please input the money allocated for candy ");
text2 = System.Console.ReadLine();
double2 = double.Parse(text2);
System.Console.WriteLine("With the amount of money you input you would get " + (double2 / double1) + " kilos of candy.");
NOTE: INT stores integer value like 1 2 3 4 etc...
As to your question:
Just use doubles decimals in the first place!
decimal price;
decimal allowance;
Also, some additional unsolicited advice:
You've got a few issues here.
First of all, you'll need to swap your division in the WriteLine statement to get the correct calculation.
Also, I'd recommend renaming your variables to something more descriptive.
Here's your code with some modifications. I've commented each change.
//The variables
decimal price; //CHANGE: descriptive variables!
decimal allowance;
string priceInput;
string allowanceInput;
//The actual calculation
System.Console.Write("Please input the kilogram price of candy: ");
priceInput = System.Console.ReadLine();
price = decimal.Parse(priceInput); //CHANGE: use double.Parse here instead of int.Parse
System.Console.Write("Please input the money allocated for candy ");
allowanceInput = System.Console.ReadLine();
allowance = decimal.Parse(allowanceInput); //CHANGE: use double.Parse here instead of int.Parse
System.Console.WriteLine("With the amount of money you input you would get "
+ Math.Round(allowance / price, 2) + " kilos of candy.");
//CHANGE: Divide the money you have by the amount it costs to get the KG of candy.
EDIT: Added decimals due to working with money.

exporting datagridview to textfile with syntax error for converting money to string format

I am trying to convert money to string like claim amount = 100.00 should be converted to 0010000
Court fees = 15 converted to 01500 and solictors fee = 00000(always the same number)
and total amount = 115 converted to 00011500. I dont how to convert these to zeros in the first place.
string value = Convert.ToString(ReturnValue);
Gives output :it is showing as 100.0000
can you help me where i am going wrong.
I tried this but still the same result. it is an sql query
" bat.PCN_Charge *100 ".ToString().PadLeft(7, '0') +
",[Court Fee] *100 ".ToString().PadLeft(5, '0') +
",[Solictors Fees] *100 ".ToString().PadLeft(5, '0') +
", (bat.PCN_Charge + [Court Fee]) *100".ToString().PadLeft(8, '0') +
My results are like these 10000.0000 1500 0 11500.0000
If you know your string should always have a length of seven, you can first calculate the plain int-value, then use:
value.ToString().PadLeft(7, '0')
// Example
var numericValue = 100.00;
var intValue = numericValue * 100; // 10000
var paddedResult = intValue.ToString().PadLeft(7, '0'); // 0010000
Alternatively, you can find lot's of info about padding numbers with zero here.
yes very simple
First multiply by 100 to override the decimal point.
Second use Format instead of convert
Try this
string value = string.Format("{0:0000000}", ReturnValue * 100);
Happy Coding
:)

In MS chart, #PERCENT{N} keyword will not return only a numeric value without decimal

am using Ms chart and i just need a number or numeric value for percentage calculation so for that am using #PERCENT{N} but its returning a decimal value like 0.45 0.78 0.11 etc.. which i do not need, i want it should give me like only numeric value like 45 78 11 23 etc.. please see my below code. its just a part of my coding am posting here. please help me out.
LegendCellColumn PercentageColumn = new LegendCellColumn();
PercentageColumn.Text = "#PERCENT{N}";
PercentageColumn.HeaderText = "%";
PercentageColumn.Name = "Percentage %";
//avgColumn.HeaderBackColor = Color.WhiteSmoke;
Chart1.Legends[0].CellColumns.Add(PercentageColumn);
What should i make with this to get only numeric value with out decimal value.
Thanks
Decimal outDec;
if (Decimal.TryParse("<some string>", out outDec))
{
// Sets Decimal as a Percentage out of 100
PercentageColumn.Text = Convert.ToInt32(outDec * 100).ToString();
}
Edit
To do it specifically using String formatting :
PercentageColumn.Text = "#PERCENT{P0}";
From: Social.MSDN - Shows Percentages on Pie Chart ( Aspnet)
and
MSDN - Standard Numeric Format Strings

Format decimal value to string with leading spaces

How do I format a decimal value to a string with a single digit after the comma/dot and leading spaces for values less than 100?
For example, a decimal value of 12.3456 should be output as " 12.3" with single leading space. 10.011 would be " 10.0". 123.123 is "123.1"
I'm looking for a solution, that works with standard/custom string formatting, i.e.
decimal value = 12.345456;
Console.Write("{0:magic}", value); // 'magic' would be a fancy pattern.
This pattern {0,5:###.0} should work:
string.Format("{0,5:###.0}", 12.3456) //Output " 12.3"
string.Format("{0,5:###.0}", 10.011) //Output " 10.0"
string.Format("{0,5:###.0}", 123.123) //Output "123.1"
string.Format("{0,5:###.0}", 1.123) //Output " 1.1"
string.Format("{0,5:###.0}", 1234.123)//Output "1234.1"
Another one with string interpolation (C# 6+):
double x = 123.456;
$"{x,15:N4}"// left pad with spaces to 15 total, numeric with fixed 4 decimals
Expression returns: " 123.4560"
value.ToString("N1");
Change the number for more decimal places.
EDIT: Missed the padding bit
value.ToString("N1").PadLeft(1);
Many good answers, but this is what I use the most (c# 6+):
Debug.WriteLine($"{height,6:##0.00}");
//if height is 1.23 => " 1.23"
//if height is 0.23 => " 0.23"
//if height is 123.23 => "123.23"
All above solution will do rounding of decimal, just in case somebody is searching for solution without rounding
decimal dValue = Math.Truncate(1.199999 * 100) / 100;
dValue .ToString("0.00");//output 1.99
Note the "." could be a "," depending on Region settings, when using string.Format.
string.Format("{0,5:###.0}", 0.9) // Output " .9"
string.Format("{0,5:##0.0}", 0.9) // Output " 0.9"
I ended up using this:
string String_SetRPM = $"{Values_SetRPM,5:##0}";
// Prints for example " 0", " 3000", and "24000"
string String_Amps = $"{(Values_Amps * 0.1),5:##0.0}";
// Print for example " 2.3"
Thanks a lot!

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