问Blazor Server:强制文件下载

EN

using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Net.Mime;
using System.Web;
using NLog;
using MySpector.Core;
using MySpector.Objects;

//https://chanmingman.wordpress.com/2020/07/12/add-web-api-controller-to-blazor-project-asp-net/
//https://stackoverflow.com/questions/5826649/returning-a-file-to-view-download-in-asp-net-mvc


namespace FrontEnd.Pages
{
    [Route("api/[controller]")]
    [ApiController]
    public class DownloadController : Controller
    {
        private static Logger _log = LogManager.GetCurrentClassLogger();
        private ResultStorage _resultStorage;
    // GET /api/Download/3
    [HttpGet("{resultDbId:int}")] 
    public ActionResult Get(int resultDbId)
    {
        bool isConnected = ServiceLocator.Instance.Repo.Connect();
        if (!isConnected)
        {
            _log.Error("Cannot connect");
            _log.Error("Returning Http 404");
            return NotFound();
        }
        else
        {
            _log.Debug("Connected to db");
            _log.Debug("Input: ResultDbId=" + resultDbId);
            _resultStorage = ServiceLocator.Instance.Repo.GetSingleResult(resultDbId);
        }
        if(_resultStorage==null)
        {
            _log.Error("Returning Http 404");
            return NotFound();
        }
        string filename = _resultStorage.File.FilePath;
        var cd = new ContentDisposition
        {
            FileName = filename,
            Inline = true,
        };
        Response.Headers.Add("Content-Disposition", cd.ToString());
        byte[] filedata = System.IO.File.ReadAllBytes(filename);
        string contentType = "application/octet-stream";
        return File(filedata, contentType);
    }
}
}

        string downloadUri = "api/Download/" + @_report.Result.DbId;
        <NavLink href="@downloadUri">Download raw file</NavLink><br />