c# - Zip file with utf-8 file names

C# - Zip file with utf-8 file names

Creating a zip file with UTF-8 encoded file names in C# can be done using the System.IO.Compression namespace, specifically with the ZipArchive and ZipArchiveEntry classes. By default, System.IO.Compression supports UTF-8 encoded file names.

Here's an example of how to create a zip file with UTF-8 file names in C#:

using System; using System.IO; using System.IO.Compression; using System.Text; class Program { static void Main() { string zipFilePath = "example.zip"; string[] filesToZip = { "example_文件.txt", "example_документ.txt" }; // Example files with UTF-8 characters in their names string tempDir = "temp"; // Create a temporary directory and some files for demonstration Directory.CreateDirectory(tempDir); foreach (var fileName in filesToZip) { string filePath = Path.Combine(tempDir, fileName); File.WriteAllText(filePath, "This is a test file.", Encoding.UTF8); } // Create a zip file with UTF-8 encoded file names using (FileStream zipFile = new FileStream(zipFilePath, FileMode.Create)) { using (ZipArchive archive = new ZipArchive(zipFile, ZipArchiveMode.Create, false, Encoding.UTF8)) { foreach (var fileName in filesToZip) { string filePath = Path.Combine(tempDir, fileName); archive.CreateEntryFromFile(filePath, fileName); } } } // Clean up temporary files and directory Directory.Delete(tempDir, true); Console.WriteLine($"Created {zipFilePath} with UTF-8 encoded file names."); } }

Explanation

  1. Setting Up File Paths:

    • zipFilePath is the path of the zip file to be created.
    • filesToZip is an array of file names to be included in the zip file, containing UTF-8 characters.
    • tempDir is a temporary directory used to store the files to be zipped.

  2. Creating Temporary Files:

    • A temporary directory is created.
    • For each file name in filesToZip, a corresponding file is created in the temporary directory with some sample content.

  3. Creating the Zip File:

    • A FileStream is created for the zip file.
    • A ZipArchive is created with the ZipArchiveMode.Create mode and Encoding.UTF8 encoding.
    • Each file from the temporary directory is added to the zip archive using the CreateEntryFromFile method.

  4. Cleaning Up:

    • The temporary files and directory are deleted after the zip file is created.

Notes

  • Encoding.UTF8: The ZipArchive constructor accepts an Encoding parameter which allows specifying the character encoding for entry names. Encoding.UTF8 ensures that the file names are encoded using UTF-8.
  • Cleanup: Ensure proper cleanup of temporary files to avoid leaving unnecessary files on the file system.
  • Error Handling: Add appropriate error handling in production code to handle exceptions that may occur during file and directory operations.

This approach uses the built-in capabilities of System.IO.Compression to handle UTF-8 file names, which simplifies the process of creating zip files with internationalized file names.

Examples

  1. Create a Zip File with UTF-8 File Names: Create a zip file in C# that supports UTF-8 encoded file names.

    using (var zip = new ZipArchive(File.Create("archive.zip"), ZipArchiveMode.Create, System.Text.Encoding.UTF8)) { zip.CreateEntry("文本.txt"); }

    This code snippet uses ZipArchive with UTF-8 encoding to create a zip file (archive.zip) containing a file named "文本.txt".

  2. Add Files with Non-ASCII Names to Zip: Add files with non-ASCII (Unicode) names to a zip archive in C#.

    using (var zip = new ZipArchive(File.Create("archive.zip"), ZipArchiveMode.Create, System.Text.Encoding.UTF8)) { zip.CreateEntry("日本語.txt"); zip.CreateEntry("русский.txt"); }

    This example adds two files ("日本語.txt" and "русский.txt") with non-ASCII names to a zip archive using UTF-8 encoding.

  3. Extract UTF-8 Named Files from Zip: Extract files with UTF-8 encoded names from a zip archive in C#.

    using (var zip = ZipFile.OpenRead("archive.zip")) { foreach (var entry in zip.Entries) { Console.WriteLine(entry.FullName); } }

    This code opens an existing zip file (archive.zip) and prints the UTF-8 encoded file names (entry.FullName) of each entry.

  4. Handle ZipEntry Encoding for UTF-8 Names: Ensure proper handling of UTF-8 encoded file names when creating zip entries.

    using (var zip = new ZipArchive(File.Create("archive.zip"), ZipArchiveMode.Create)) { var entry = zip.CreateEntry("Пример.txt"); entry.FileNameEncoding = System.Text.Encoding.UTF8; }

    Setting entry.FileNameEncoding to UTF-8 ensures proper encoding of "Пример.txt" within the zip archive (archive.zip).

  5. Read Zip File with UTF-8 Encoding: Read a zip file containing UTF-8 encoded file names and extract them in C#.

    using (var zip = ZipFile.OpenRead("archive.zip")) { foreach (var entry in zip.Entries) { using (var stream = entry.Open()) { // Process entry stream } } }

    This code opens "archive.zip" and iterates through each entry, allowing operations on each entry's stream (entry.Open()).

  6. Zip File with Directory Structure and UTF-8 Names: Create a zip file preserving directory structure and supporting UTF-8 names in C#.

    using (var zip = new ZipArchive(File.Create("archive.zip"), ZipArchiveMode.Create, System.Text.Encoding.UTF8)) { string[] files = { "dir1/文本.txt", "dir2/русский.txt" }; foreach (var file in files) { zip.CreateEntryFromFile(file, file); } }

    This example creates a zip file (archive.zip) with directory structure (dir1/, dir2/) and UTF-8 encoded file names.

  7. ZipFile ExtractToDirectory with UTF-8: Extract a zip file containing UTF-8 encoded file names to a directory in C#.

    ZipFile.ExtractToDirectory("archive.zip", "extracted_directory", System.Text.Encoding.UTF8);

    This code extracts "archive.zip" to "extracted_directory" while handling UTF-8 encoded file names.

  8. Modify Existing Zip Entry with UTF-8: Modify an existing zip entry to ensure UTF-8 encoding for file names in C#.

    using (var zip = ZipFile.Open("archive.zip", ZipArchiveMode.Update, System.Text.Encoding.UTF8)) { var entry = zip.GetEntry("old_name.txt"); if (entry != null) { entry.Delete(); zip.CreateEntry("новое_имя.txt"); } }

    Here, "archive.zip" is opened for update, and entry is deleted and replaced with a new entry "новое_имя.txt" using UTF-8 encoding.

  9. Handle ZipEntry Encoding Globally: Set global settings for UTF-8 encoding in ZipArchive entries across operations.

    ZipFile.DefaultUnicode = true; using (var zip = ZipFile.Open("archive.zip", ZipArchiveMode.Update)) { // Operations with UTF-8 encoding }

    Setting ZipFile.DefaultUnicode to true ensures all entries in "archive.zip" are handled with UTF-8 encoding by default.

  10. ZipEntry Encoding for Compatibility: Ensure compatibility with older zip utilities when using UTF-8 encoded names.

    using (var zip = new ZipArchive(File.Create("archive.zip"), ZipArchiveMode.Create, System.Text.Encoding.GetEncoding("CP437"))) { zip.CreateEntry("ønske.txt"); }

    Using System.Text.Encoding.GetEncoding("CP437") ensures compatibility with older zip utilities while supporting UTF-8 encoded file names ("ønske.txt").

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