javascript - Asp.net WebApi Aspose.Cells - 导出和下载 Excel

Question

我使用 Aspose.Cells 创建 Excel 文件。

实际上我正在尝试将 xls 文件保存在磁盘上，但无法解决此问题。这是我的获取方法。

[Route("xls")]
    [HttpGet]
    public HttpResponseMessage Export()
    {
        try
        {
            string dataDir = KnownFolders.GetPath(KnownFolder.Downloads);
            //var workbook = TransferService.Export();  //TODO get xml
            Workbook workbook = new Workbook();              
            var stream = workbook.SaveToStream();   

            // I need save this workbook

            return Request.CreateResponse(HttpStatusCode.OK); //it's not important here
        }
        catch (Exception ex)
        {

            return Request.CreateResponse(HttpStatusCode.InternalServerError); //it's not important here
        }
    }

我还有一个名为 onClick 的函数

function exportToXls() {
    $.get(exportURI, function (response) {
        return response;
    });
}

当有人点击它时，应该将文件保存在他的磁盘上(或者打开浏览器，我可以在其中选择位置和名称)。怎么解决这个问题？

Answer 1

C#

    [Route("xls")]
    [HttpPost] // can use Get, but Post seems to be recommended
    public HttpResponseMessage Export()
    {
        var response = new HttpResponseMessage();

        try
        {
            // Create workbook
            var wb = new Workbook();

            /* ** fill in workbook / worksheet content ** */

            // save workbook to MemoryStream
            var stream = new MemoryStream();
            wb.Save(stream, SaveFormat.Xlsx);
            stream.Position = 0;    // important!

            // add stream to response
            response.Content = new StreamContent(stream);

            // set Headers
            response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue(dispositionType: "attachment"); // or "inline"
            response.Content.Headers.ContentDisposition.FileName = wb.FileName; // or other means of getting filename
            response.Content.Headers.ContentType = new MediaTypeHeaderValue(mediaType: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
            response.Content.Headers.ContentLength = stream.Length;

            // set the success code
            response.StatusCode = HttpStatusCode.OK;
        }
        catch(Exception ex)
        {
            response.StatusCode = HttpStatusCode.InternalServerError;
            response.Content = null; // just in case
            response.ReasonPhrase = ex.Message;
        }

        return response;
    }

如果您启用了 CORS，您可能需要允许 Content-Disposition header :

    public static void Register(HttpConfiguration config)
    {
        var cors = new EnableCorsAttribute(origins: "*", headers: "*", methods: "*");
        cors.ExposedHeaders.Add(item: "Content-Disposition");
        config.EnableCors(cors);

        /* The rest of WebAPI configuration */
    }

对于 Javascript 端 -- the answer here may help. (注意:请确保将方法设置为 POST，或将我的示例更改为 GET。)