从WCF - ASP.NET核心下载压缩文件

using Microsoft.AspNetCore.Mvc;
using System.IO;
using System.IO.Compression;

public class FileController : Controller
{
    [HttpGet("download/zip")]
    public IActionResult DownloadZip()
    {
        // 创建一个内存流来保存ZIP文件
        using (var memoryStream = new MemoryStream())
        {
            // 创建ZIP存档
            using (var archive = new ZipArchive(memoryStream, ZipArchiveMode.Create, true))
            {
                // 添加文件到ZIP存档
                var demoFile = archive.CreateEntry("example.txt");
                using (var entryStream = demoFile.Open())
                using (var streamWriter = new StreamWriter(entryStream))
                {
                    streamWriter.Write("This is an example text file.");
                }
            }

            // 设置HTTP头信息
            memoryStream.Position = 0;
            return File(memoryStream, "application/zip", "example.zip");
        }
    }
}