Develop Reference

Convert a string to decimal with specific format [closed]

Closed. This question needs details or clarity. It is not currently accepting answers.
Want to improve this question? Add details and clarify the problem by editing this post.
Closed 4 months ago.
Improve this question
I need to convert a string to decimal with specific format in C#. This string can be in different formats. For example it can be: 20 or 20.5.
I need it to convert to xx.xxx. Is there is a method to do this?

C# decimal values are binary. They do not have a human-readable format and can NEVER have a human-readable format. Anything you see otherwise is a convenience provided by the debugger or other tooling. If you need a decimal formatted in a certain way, what you really need is a string.
That said, the decimal type is a good intermediary to be sure you get the correct desired string output: first Parse() the original string value to a decimal, then convert from a decimal to the final formatted string result using the decimal's ToString() method.
Finally, it's important to understand cultural and internationalization issues mean converting between strings and true numeric values is far more error-prone and slow than we'd like to believe. It's something to avoid. Therefore the best strategy is usually parsing a value into an unformatted decimal as quickly as possible, and then keeping it there as long as possible — until the last possible moment before you need to format it for output.

You can specify the format like the below:
string t = "2020.5";
var d = decimal.Parse(t).ToString("00.000");
If your string contains any special character you need to sanitize it before you parse it. E.g. if the string contains space you can replace it with empty char like this:
t = t.Replace(" ", "");

Left-pad a floating point number without losing trailing zeros after decimal point [closed]

Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 6 years ago.
Improve this question
I am attempting to write out to a fixed format text file and am having some trouble formatting the numbers properly. It needs to be padded with leading zeros and an implied decimal.
Example:
43.80
The output would need to be:
0000004380
So far, I have attempted to convert the double to a string, replace the decimal, and then pad with "0".
((amount.ToString()).Replace(".","")).PadLeft(10, '0')
The problem with this is when the number ends with zeros. The above example comes out as:
0000000438
Any suggestions?

decimal value = 34.80M;
int intVal = (int)(value * 100);
return intVal.ToString("0000000000");

You could try:
((string.Format("{0:0.00}", amount)).Replace(".","")).PadLeft(10, '0')
That way you don't lose the 2nd decimal place when the value is 0.

You can pass a .ToString() format string in as described in this article:
https://msdn.microsoft.com/en-us/library/dwhawy9k(v=vs.110).aspx
Does the incoming value always have two decimal places? If so, you could multiply by 100 to get rid of the decimal, and then to .ToString("D10")
(Int)(43.80 * 100).ToString("D10")

This should do the job : $"{(int)(amount * 100):D010}"

String to decimal [closed]

Closed. This question needs debugging details. It is not currently accepting answers.
Edit the question to include desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem. This will help others answer the question.
Closed 6 years ago.
Improve this question
The application that I've made I've got a text box called service cost. This allows the user to enter the cost of the service they have provided and this is decimal. I'm trying to get this service cost displayed in a DGV, I've got everything else working apart from this.
currentComputer.ServiceCost = Convert.ToDecimal(txtServiceCost);
The above is the code that I currently have, is there something wrong that I've done here?

From the question it is clear that txtServiceCost is the TextBox, and Convert.ToDecimal() expects a string as input so you should use txtServiceCost.Text instead for txtServiceCost. Since txtServiceCost is a control where as txtServiceCost.Text is a string
currentComputer.ServiceCost = Convert.ToDecimal(txtServiceCost.Text);
But i would like to suggest you to use decimal.TryParse
decimal userInput;
if (!decimal.TryParse(txtServiceCost.Text, out userInput))
{
// Throw some warning here that invalid input
}
currentComputer.ServiceCost = userInput;

how do i display how many digits the number has? [closed]

Closed. This question needs debugging details. It is not currently accepting answers.
Edit the question to include desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem. This will help others answer the question.
Closed 7 years ago.
Improve this question
Currently very new to C# and coding , so i will be more than happy if someone will explain me how to display how many digits the number has. For example the number 12345 has 5 digits.the main theme in the class is while loops so the answer probably need to contain while loop.TY

You can either use this
Math.Abs(myint).ToString().Length
and if you absolutely must use a while loop then
number = Math.Abs(number);
int length = 1;
while ((number /= 10) >= 1)
length++;
To test code

string.Trim().Replace("-","").Length
so if you have a number you should make it a string first using ToString()
The Length returns the number of characters that you hold within your string minus your white spaces (Because of the Trim()),i don't see why you would want to use the while loop in the first place.
Edit : if you have a minus number the .Replace() will take care of that.

Put a "," sign on the number [closed]

Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
Questions asking for code must demonstrate a minimal understanding of the problem being solved. Include attempted solutions, why they didn't work, and the expected results. See also: Stack Overflow question checklist
Closed 9 years ago.
Improve this question
i wanna ask. How do i put "," sign on the number whenever the number length is more than 3, then add 1 "," sign.
for example:
I have a number "100000000", and i want computer display it as "100.000.000,00", how do i do that?
Here is the image:
In picture above, shown that the SubTotal is "10000", i want computer display it as "10.000,00" and the Total beside SubTotal is "10000000", i want computer display it as "10.000.000,00".
My question is: how do i do that?
Thanks

A lot of it depends on the control(s) you are using. If you're using plain text boxes you can just set the format when setting the Text value:
txtbox1.Text = total.ToString("N2"); // numeric with separators and 2 decimal places
Other third-party controls let you choose the format with a property such as NumberFormat. Grid controls usually set the format on a column rather than an individual cell.

You should use
amount.ToString("N");

If you're doing it programmatically:
int myNumber = 10000000;
string output = String.Format("{0:n2}", myNumber);
or
int myNumber = 10000000;
string output = myNumber.ToString("n2");
The number after n is the number of decimal places (which can be 0 if you want).
Or you might need to set a format string of a user control to "n2" (without quotes) depending on how you are displaying the numbers.

Have a look at standard numeric format strings and custom numeric format strings on MSDN.
You should use the numeric format specifier to achieve what you want:
number.ToString("N", CultureInfo.InvariantCulture);