How to unzip any (zip)file that is IFormFile property using C#

Question

My scenario is Client side will upload a zipped file.

Then in the back-end asp.net core, the file is retrieve as IFormFile.

How do I extract this IFormFile and pick a specific file inside it?

Answer 1

I'm afraid you may take ZipArchive package into consideration. Pls install this package first to try my code snippet<PackageReference Include="System.IO.Compression" Version="4.3.0" />

Here's my controller method:

[HttpPost]
        public async Task<IActionResult> Upload(FileModel file)
        {
            var stream = file.myfile.OpenReadStream();
            var archive = new ZipArchive(stream);
            ZipArchiveEntry innerFile = archive.GetEntry("code.txt");
            var filePath = Path.Combine(Directory.GetCurrentDirectory(), @"wwwroot\files", "code.txt");
            innerFile.ExtractToFile(filePath);
            return Ok();
        }

And this is my test view:

@model WebAppMvc.Models.FileModel

<form enctype="multipart/form-data" method="post">
    <dl>
        <dt>
            <label asp-for="myfile"></label>
        </dt>
        <dd>
            <input asp-for="myfile" type="file">
            <span asp-validation-for="myfile"></span>
        </dd>
    </dl>
    <input asp-page-handler="Upload" class="btn" type="submit" value="Upload" />
</form>

And my model looks like this:

using Microsoft.AspNetCore.Http;

namespace WebAppMvc.Models
{
    public class FileModel
    {
        public IFormFile myfile { set; get; }
    }
}