Remove extension from a file name in C#

This post will discuss how to remove an extension from a file name in C#.

1. Using `Path.ChangeExtension()` method

To get the full path without the extension, consider using Path.ChangeExtension() method. It takes two parameters – the path to modify and the new extension. The idea is to pass null to the ChangeExtension() method parameter to remove the existing extension.

using System;

using System.IO;

public class Example

{

public static void Main()

{

string filepath = @"C:\some\path\filename.txt";

string filePathWithoutExt = Path.ChangeExtension(filepath, null);

Console.WriteLine(filePathWithoutExt);

}

Output: C:\some\path\filename

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2. Using `Path.GetExtension()` method

The idea is to get the extension name using the Path.GetExtension() method and remove the same characters from the end of the string as the extension’s length.

using System;

using System.IO;

public class Example

{

public static void Main()

{

string filepath = "D:\Study\filename.txt";

string extension = Path.GetExtension(filepath);

string filePathWithoutExt = filepath.Substring(0, filepath.Length - extension.Length);

Console.WriteLine(filePathWithoutExt);

}

Output: C:\some\path\filename

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3. Using `Path.GetFileNameWithoutExtension()` method

If only the file name is needed without path information and the extension, consider using Path.GetFileNameWithoutExtension() method.

using System;

using System.IO;

public class Example

{

public static void Main()

{

string filepath = @"C:\some\path\filename.txt";

string fileNameWithoutExt = Path.GetFileNameWithoutExtension(filepath);

Console.WriteLine(fileNameWithoutExt);

}

Output: filename

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That’s all about removing the extension from a file name in C#.

Remove extension from a file name in C#

1. Using Path.ChangeExtension() method

2. Using Path.GetExtension() method

3. Using Path.GetFileNameWithoutExtension() method

Share this:

1. Using `Path.ChangeExtension()` method

2. Using `Path.GetExtension()` method

3. Using `Path.GetFileNameWithoutExtension()` method