c# - 如何从字节数组 c# MVC .NET Core 在 iframe 中显示 pdf

Question

我在网上搜索了答案，但没有找到答案。我想知道如何以及是否能够使用 Razor 将 pdf 文件渲染到位于我 View 中的 iFrame 中。 pdf 是一个字节数组并加载到我的模型中。

到目前为止，这是我的代码:

public ActionResult ByteConverter(byte[] pdfData)
{
    MemoryStream Stream = new MemoryStream(pdfData);
    Stream.Write(pdfData, 0 , pdfData.Length);
    Stream.Position = 0;
    return new FileStreamResult(Stream,"application/pdf");
}

我的模型:

 public async Task<ActionResult> Index()
 {
     ApiClient api = new ApiClient("http://localhost:43674/ApiCore");
     var result = await api.GetAsync();

       RegulationViewModel viewModel = new RegulationViewModel
       {
         ConnectedToRoadMap = result.ConnectedToRoadMap,
         Decided = result.Decided,
         Enforced = result.Enforced,
         Id = result.Id,
         Paragraph = result.Paragraph,
         Pdf = result.Pdf,
         Published = result.Published,
         Region = result.Region,
         StructuredInfo = result.StructuredInfo,
         Title = result.Title,
         ValidThru = result.ValidThru  
        };

        ByteConverter(viewModel.Pdf);

        return View(viewModel);
}

我的观点:

<div class="tab-pane active" id="dokument">
    <iframe src="@Url.Action("ByteConverter", "RegulationController")"></iframe>
</div>

Answer 1

好吧，几天后我设法通过将模型中的 Pdf 值更改为 Convert.ToBase64String(result.Pdf) 来使其工作，如下所示:

 public async Task<ActionResult> Index()
        {
            ApiClient api = new ApiClient("http://localhost:43674/ApiCore");
            var result = await api.GetAsync();

            RegulationViewModel viewModel = new RegulationViewModel
            {
                ConnectedToRoadMap = result.ConnectedToRoadMap,
                Decided = result.Decided,
                Enforced = result.Enforced,
                Id = result.Id,
                Paragraph = result.Paragraph,
                Pdf = Convert.ToBase64String(result.Pdf),
                Published = result.Published,
                Region = result.Region,
                StructuredInfo = result.StructuredInfo,
                Title = result.Title,
                ValidThru = result.ValidThru
            };

            return View(viewModel);
        }

在我看来，我完全跳过了 @Url.Action("ByteConverter", "RegulationController") 并将其替换为:

<iframe src="data:application/pdf;base64,@Model.Pdf" type="application/pdf"></iframe>

在除 IE 之外的所有网络浏览器中都能正常工作，这是因为 Internet Explorer 不支持使用 DATA URI 作为 iframe 的来源。