Question

是否可以发送文件响应以下载和重定向用户？要遵循的步骤是什么？如果有人可以提供资源或概述的链接，我将不胜感激。我的场景是用户发送请求下载文件操作方法，然后操作方法发送文件下载并重定向用户

我尝试了如下：

 [HttpGet]
     [Authorize]
     public ActionResult DownloadFile()
            {

                var currentUserId = User.Identity.GetUserId();
                var invoices = _context.Invoices
.Where(x => x.OwnerId == currentUserId).ToList();

                var directory = HttpContext.Server.MapPath("~/Temp");
                var timeStamp = DateTime.Now.ToString("yyyy_MM_dd_HH_mm");

                var fileName = string.Concat("myfile", "_", timeStamp, ".xlsx");
                var filePath = Path.Combine(directory, fileName);

                FileService fs = new FileService();
                var file = fs.GenerateExcelFile(filePath, invoices);

                    Response.ClearHeaders();
                    Response.Headers.Add("Content-Disposition", "attachment; filename=" + fileName);
                    var contentType ="application/excel";
                    return File(filePath ,contentType);

                   // HOW do I send download file and return to view ??

            }

Answer 1

在您的视图中添加此代码。它使用jQuery和web api返回带附件头的文件。超时功能旨在允许一些时间从服务器请求文件。

<a id="link" href="#">Click here to download</a>
<script type="text/javascript">
    $('#link').click(function (e) {
        e.preventDefault();  //prevent browser to follow link
        setTimeout(function () { //Redirected to new page in 2 sec
            window.location.href = 'http://localhost:2981/Home/NewPage'
        }, 2000);
        window.location.href = 'http://localhost:2981/api/files/get/';
    });
</script>

我的案例中的web api是一种虚拟方法。标题是重要的部分。您希望提示用户下载文件而不是重定向到该文件。因此，我们需要添加附件标题。

public class FilesController : ApiController
{

    [HttpGet]
    public HttpResponseMessage Get()
    {
        string result = "this is the file content";
        var response = new HttpResponseMessage(HttpStatusCode.OK);
        response.Content = new StringContent(result, System.Text.Encoding.UTF8, "text/plain");
        response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment");
        return response;
    }
}

ASP.Net MVC5下载文件和rediredt

1 个答案: