Trim String in C#

Introduction

To trim a string in C#, we can use String.Trim method that trims a string from both ends by removing white spaces or a specified character or characters from the start and the end of a string. The code example of string.trim is below.

In .NET and C#, strings are immutable. That means, the method does not update the existing string but returns a new string.

String.Trim()

String.Trim() method has two overloaded forms. 

Method	Description
Trim(Char[])	Removes all leading and trailing occurrences of a set of characters specified in an array from the current String object.
Trim()	Removes all leading and trailing white-space characters from the current String object.

Example

The following example uses Trim methods to trim whitespaces and other characters from a string. 

// String with whitespaces  
string hello = " hello C# Corner has white spaces ";  
// Remove whitespaces from both ends  
Console.WriteLine(hello.Trim());  
  
// String with characters  
string someString = ".....My name is Mahesh Chand****";  
char[] charsToTrim = { '*', '.' };  
string cleanString = someString.Trim(charsToTrim);  
Console.WriteLine(cleanString);  

Listing 1.

The output of Listing 1 looks like Figure 1.

 

Figure 1.

String.TrimStart()

String.TrimStart() method removes all leading occurrences of a set of characters specified in an array from the current String object.

Example

The following example uses TrimStart methods to trim whitespaces and other characters from the start of a string. 

// String with whitespaces  
string hello = " hello C# Corner has white spaces ";  
// Remove whitespaces from both ends  
Console.WriteLine(hello.TrimStart());  
  
// String with characters  
string someString = ".....My name is Mahesh Chand****";  
char[] charsToTrim = { '*', '.' };  
string cleanString = someString.TrimStart(charsToTrim);  
Console.WriteLine(cleanString);  

Listing 2.

The output of Listing 2 looks like Figure 2.

 

Figure 2.

String.TrimEnd()

String.TrimEnd() method removes all trailing occurrences of a set of characters specified in an array from the current String object.

Example

The following example replaces all commas with a colon in a string. 

// String with whitespaces  
string hello = " hello C# Corner has white spaces ";  
// Remove whitespaces from both ends  
Console.WriteLine(hello.TrimEnd());  
  
// String with characters  
string someString = ".....My name is Mahesh Chand****";  
char[] charsToTrim = { '*', '.' };  
string cleanString = someString.TrimEnd(charsToTrim);  
Console.WriteLine(cleanString);  

Listing 3.

The output of Listing 3 looks like Figure 3.

 

Figure 3.

Conclusion

In this article, we learned about String.Trim() method in C#. String.Trim(), String.TrimStart(), and String.TrimEnd() methods provide trim string functionality in C# and .NET.  The Trim method removes white spaces from the beginning and endof a string.