如何在 MVC Web API 的新选项卡中打开呈现的 RDL 报告？

Question

我刚刚想出了如何将我的 RDL 报告呈现为 pdf 文件，但它目前位于临时文件夹中。下一步应该是在新窗口或选项卡中打开以进行查看。我尝试了许多解决方案，但似乎没有任何效果。

这是我当前的代码：

    [HttpGet]
    [Route("printDCF")]
    public IHttpActionResult printDCF(int controlFormDetailID)
    {
        try
        {
            ApiResult apiResult = new ApiResult();
            var reportData = ControllerLogic.GetReportData(controlFormDetailID);
            generateReport(reportData);

            return Ok(apiResult);
        }
        catch (Exception ex)
        {
            return InternalServerError(ex);
        }
    }

    public System.Web.Mvc.FileContentResult generateReport(List<DocumentControlFormPrintResult> reportData)
    {
        string RptPath = HttpContext.Current.Server.MapPath("~/AngularViews/forms/dcf/report/DCF_Report.rdl");
        LocalReport rpt = new LocalReport();

        rpt.DataSources.Add(new ReportDataSource("DataSet1", reportData));

        rpt.ReportPath = RptPath;
        string filePath = System.IO.Path.GetTempFileName();
        Export(rpt, filePath);      
        rpt.Dispose();

        System.Web.Mvc.FileContentResult result = new System.Web.Mvc.FileContentResult(System.IO.File.ReadAllBytes(filePath), "application/pdf")
        {
            FileDownloadName = "dcf_print.pdf",
        };

        return result;
    }

    public string Export(LocalReport rpt, string filePath)
    {
        string ack = "";
        try
        {
            Warning[] warnings;
            string[] streamids;
            string mimeType;
            string encoding;
            string extension;

            byte[] bytes = rpt.Render("PDF", null, out mimeType, out encoding, out extension, out streamids, out warnings);
            using (FileStream stream = File.OpenWrite(filePath))
            {
                stream.Write(bytes, 0, bytes.Length);
            }
            return ack;
        }
        catch (Exception ex)
        {
            ack = ex.InnerException.Message;
            return ack;
        }
    }

Answer 1

我想，我自己试过这段代码对我来说很好，它对你很有用

[HttpGet]
    [Route("api/Data/OpenPDF")]
    public HttpResponseMessage OpenPDF()
    {
        var stream = new MemoryStream();
        string filePath = @"D:\PDF\pdf-test.pdf";
        using (FileStream fileStream = File.OpenRead(filePath))
        {
            stream = new MemoryStream();
            stream.SetLength(fileStream.Length);
            fileStream.Read(stream.GetBuffer(), 0, (int)fileStream.Length);
        }
        var result = new HttpResponseMessage(HttpStatusCode.OK)
        {
            Content = new ByteArrayContent(stream.ToArray())
        };
        result.Content.Headers.ContentDisposition = new System.Net.Http.Headers.ContentDispositionHeaderValue(System.Net.Mime.DispositionTypeNames.Inline)
        {
            FileName = System.IO.Path.GetFileName(filePath)
        };
        result.Content.Headers.ContentType = new MediaTypeHeaderValue("application/pdf");
        return result;
    }