Determine whether a string ends with another string in C#

This post will discuss how to determine whether a string ends with another string in C#.

1. Using `String.EndsWith()` method

The standard method to determine whether a string ends with another string is to use the String.EndsWith() method. It returns true if the end of the string matches with the specified string. This is demonstrated below:

using System;

public class Example

{

public static void Main()

{

string str = "100$";

string suffix = "$";

bool endsWith = str.EndsWith(suffix);

Console.WriteLine(endsWith); // True

}

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2. Using `Enumerable.Any()` method

If you need to match the end of a string with the list of given strings, consider using LINQ’s Enumerable.Any() method. It returns true when any element of a sequence satisfy the specified condition. The following code example shows how to test a suffix in a list of strings using the Any() and EndsWith() method.

using System;

using System.Linq;

public class Example

{

public static void Main()

{

string[] extensions = { ".txt", ".log", ".bat", ".sh" };

string str = "system.log";

bool endsWith = extensions.Any(suffix => str.EndsWith(suffix));

Console.WriteLine(endsWith); // True

}

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3. Using `Regex.IsMatch()` method

Alternatively, you can use the regular expression to match the end of a string with the list of strings. This can be done using the Regex.IsMatch() method, which tells whether the specified string matches the provided regex. This is demonstrated below. Note that $ matches with the end of the string.

using System;

using System.Text.RegularExpressions;

public class Example

{

public static void Main()

{

string str = "system.log";

bool endsWith = Regex.IsMatch(str, "(txt|log|bat|sh)$");

Console.WriteLine(endsWith); // True

}

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That’s all about determining whether a string ends with another string in C#.

Determine whether a string ends with another string in C#

1. Using String.EndsWith() method

2. Using Enumerable.Any() method

3. Using Regex.IsMatch() method

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1. Using `String.EndsWith()` method

2. Using `Enumerable.Any()` method

3. Using `Regex.IsMatch()` method