Automatically Convert File Names to Lowercase: A Simple Application with C#

In daily life, especially for those dealing with file management, organizing file names is a common need. For example, you may want to convert all file names in a folder to lowercase. Doing this manually can be time-consuming and prone to errors. In this article, we will develop a simple application using the C# programming language and Windows Forms to automatically convert all file names in a folder to lowercase.

Purpose of the Application

This application aims to simplify file management by converting all file names in a user-selected folder to lowercase. The application also shows the user which file names have been changed.

How the Application Works

Folder Selection: The user selects a folder.
File Listing: All files in the selected folder are listed.
File Name Conversion: Each file name is converted to lowercase, and the file name is updated.
Display Results: The changed file names are displayed to the user.

Code Analysis

Below, we will examine the basic code structure of the application:


using System;
using System.IO;
using System.Windows.Forms;

namespace FileNameConverter
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void btnSelectFolder_Click(object sender, EventArgs e)
        {
            lstFiles.Items.Clear(); // Clear the ListBox
            using (FolderBrowserDialog fbd = new FolderBrowserDialog())
            {
                if (fbd.ShowDialog() == DialogResult.OK)
                {
                    string folderPath = fbd.SelectedPath;

                    try
                    {
                        string[] files = Directory.GetFiles(folderPath);

                        foreach (string file in files)
                        {
                            string fileName = Path.GetFileNameWithoutExtension(file);
                            string extension = Path.GetExtension(file);

                            // Convert file name to lowercase
                            string newFileName = fileName.ToLower() + extension;

                            // Create the new file path
                            string newFilePath = Path.Combine(folderPath, newFileName);

                            // Rename the file
                            File.Move(file, newFilePath);

                            // Add the change to the ListBox
                            lstFiles.Items.Add($"{Path.GetFileName(file)} >>> {newFileName}");
                        }
                        MessageBox.Show("All file names have been converted to lowercase.");
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show("An error occurred: " + ex.Message);
                    }
                }
            }
        }
    }
}

using System;

using System.IO;

using System.Windows.Forms;

namespace FileNameConverter

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private void btnSelectFolder_Click(object sender, EventArgs e)

{

lstFiles.Items.Clear(); // Clear the ListBox

using (FolderBrowserDialog fbd = new FolderBrowserDialog())

{

if (fbd.ShowDialog() == DialogResult.OK)

{

string folderPath = fbd.SelectedPath;

try

{

string[] files = Directory.GetFiles(folderPath);

foreach (string file in files)

{

string fileName = Path.GetFileNameWithoutExtension(file);

string extension = Path.GetExtension(file);

// Convert file name to lowercase

string newFileName = fileName.ToLower() + extension;

// Create the new file path

string newFilePath = Path.Combine(folderPath, newFileName);

// Rename the file

File.Move(file, newFilePath);

// Add the change to the ListBox

lstFiles.Items.Add($"{Path.GetFileName(file)} >>> {newFileName}");

}

MessageBox.Show("All file names have been converted to lowercase.");

}

catch (Exception ex)

{

MessageBox.Show("An error occurred: " + ex.Message);

}

Explanation of the Code

Folder Selection: The FolderBrowserDialog allows the user to select a folder. After the user selects a folder, the path of the selected folder is retrieved using the SelectedPath property.
File Listing: The Directory.GetFiles method retrieves the paths of all files in the selected folder and stores them in an array.
File Name Conversion: For each file, the Path.GetFileNameWithoutExtension and Path.GetExtension methods are used to separate the file name and extension. The file name is converted to lowercase, and a new file path is created. The File.Move method is used to rename the file.
Display Results: The changed file names are added to the ListBox control and displayed to the user.

Error Handling

The application uses a try-catch block to catch any errors that may occur while renaming files. For example, if a file with the same name already exists or if the file is in use, an error message is displayed to the user.

Conclusion

This application provides a simple and effective solution for users who want to automatically convert file names to lowercase. Developed using C# and Windows Forms, this application serves as a basic example for simplifying file management tasks. Such applications can be time-saving, especially for users working with large numbers of files.

In this article, we developed a simple file renaming application using C#. This example demonstrates how powerful the C# language is for file operations and user interface creation. Applications like this can serve as a starting point for developing more complex file management tools.

Automatically Convert File Names to Lowercase: A Simple Application with C#

Purpose of the Application

How the Application Works

Code Analysis

Explanation of the Code

Error Handling

Conclusion

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Purpose of the Application

How the Application Works

Code Analysis

Explanation of the Code

Error Handling

Conclusion

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