Resources » Code Snippets » Regular Expressions

Remove Trailing Zeroes From a String in C# using Regular Expressions


Last Updated:   Category: Regular Expressions    
Author: Member Level: Bronze    Points: 10



The code sample is that of a function RemoveTrailingZeros in C#, that takes a string input and removes all trailing zeros in it.

The code uses the Regex object provided by the .Net class library. Regular Expressions optimize the operation of "searching patterns" in a string. The following code can also be taken as an example to remove any character (trailing) from a string. The only change require will be that we need to change the Regular Expression.


//Regex is in System.Text.RegularExpressions namespace
public string RemoveTrailingZeroes(string input)
{
Regex reg1 = new Regex("\\.\\d*(?<1>0+)[^\\d]*$", RegexOptions.IgnoreCase);

Match m = reg1.Match(input);
if( m.Success )
{
input = input.Replace(m.Groups["1"].Value, "");
Regex reg2 = new Regex("(?<1>\\.)[^\\d]*$", RegexOptions.IgnoreCase);
m = reg2.Match(input);

if( m.Success )
{
input = input.Replace(".", "" );
}
Regex reg3 = new Regex("\\d", RegexOptions.IgnoreCase );
m = reg3.Match(input);
if( !m.Success )
{
input = "0" + input;

}

}
if(input.StartsWith("."))
input = "0" + input;

return input;
}


Did you like this resource? Share it with your friends and show your love!

Responses to "Remove Trailing Zeroes From a String in C# using Regular Expressions"
Author: Dan    08 May 2009Member Level: Bronze   Points : 1
This might be easier and faster:

public string RemoveTrailingZeroes(string s)
{
s = s.TrimStart('0').TrimEnd('0', '.');
if(s.StartsWith(".")) s = "0" + s;
return s;
}



Guest Author: Pitrs81     03 Jan 2012
Not even one method works correctly.

First (using regex) doesn't work for numbers like 1.1010 (output is 1.11).
Second (using trim) doesn't work for numbers like 7000.00 (output is 7).



Feedbacks      

Post Comment:




  • Do not include your name, "with regards" etc in the comment. Write detailed comment, relevant to the topic.
  • No HTML formatting and links to other web sites are allowed.
  • This is a strictly moderated site. Absolutely no spam allowed.
  • Name:   Sign In to fill automatically.
    Email: (Will not be published, but required to validate comment)



    Type the numbers and letters shown on the left.


    Submit Article     Return to Article Index

    Subscribe to Subscribers
    Active Members
    TodayLast 7 Daysmore...

    Awards & Gifts
    Talk to Webmaster Tony John
    Copyright © SpiderWorks Technologies Pvt Ltd., Kochi, India