Trim String In C#

Trang chủ » Hàm Trim Trong C# » Trim String In C#

Có thể bạn quan tâm

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.

C# Trim String

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.

String.TrimStart() Method

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.

C# TrimEnd

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.

Từ khóa » Hàm Trim Trong C#