Question

我需要检索然后显示pdf文件。我有工作代码从数据库中检索图像，转换为.pdf，并将其作为JSON返回。我可以通过将它变成blob来显示这个就好了，但是因为IE拒绝支持数据URI，我想我可以在服务器上生成一个临时的pdf文件然后像这样链接到它，正如网站上其他地方所建议的那样：

<iframe style="width: 100%; height: 100%;" frameborder="0" scrolling="no" id="myFrame">
    <p>It appears your web browser doesn't support iframes.</p>
</iframe>

然后在.js文件中设置src属性：

 $('#myFrame').attr('src', 'http://www.example.com/tempPDFname.pdf');

如何生成此文件并使其在服务器（C＃）上可用，以便我可以设置src属性？

Answer 1

＆＃34; GhostScript的＆＃34;可以帮到你。请查看链接How to use Ghostscript for converting PDF to Image和https://ghostscriptnet.codeplex.com/

Answer 2

How to return a PDF from a Web API application

[HttpGet]
[Route("documents/{docid}")]
public HttpResponseMessage Display(string docid) {
HttpResponseMessage response = Request.CreateResponse(HttpStatusCode.BadRequest);
var documents = reader.GetDocument(docid);
if (documents != null && documents.Length == 1) {
    var document = documents[0];
    docid = document.docid;
    byte[] buffer = new byte[0];
    //generate pdf document
    MemoryStream memoryStream = new MemoryStream();
    MyPDFGenerator.New().PrintToStream(document, memoryStream);
    //get buffer
    buffer = memoryStream.ToArray();
    //content length for use in header
    var contentLength = buffer.Length;
    //200
    //successful
    var statuscode = HttpStatusCode.OK;
    response = Request.CreateResponse(statuscode);
    response.Content = new StreamContent(new MemoryStream(buffer));
    response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/pdf");
    response.Content.Headers.ContentLength = contentLength;
    ContentDispositionHeaderValue contentDisposition = null;
    if (ContentDispositionHeaderValue.TryParse("inline; filename=" + document.Name + ".pdf", out contentDisposition)) {
        response.Content.Headers.ContentDisposition = contentDisposition;
    }
} else {
    var statuscode = HttpStatusCode.NotFound;
    var message = String.Format("Unable to find resource. Resource \"{0}\" may not exist.", docid);
    var responseData = responseDataFactory.CreateWithOnlyMetadata(statuscode, message);
    response = Request.CreateResponse((HttpStatusCode)responseData.meta.code, responseData);
}
return response;

}

在服务器上动态创建.pdf文件

2 个答案: