提示下载生成的PDF文件

Question

我一直在尝试从我的应用程序生成简单的PDF文件，以便稍后转到使用动态数据生成PDF文件。我的代码生成文件，但我想要一种方式来让浏览器提示文件的下载。

我实际上甚至不想将生成的文件存储在我的服务器上，但我不确定如何将它提供给用户，而无需先将其存储在服务器驱动器中。

public ActionResult GetPDF() 
{ 
    Document document = new Document(); 
    PdfWriter.GetInstance(document, new FileStream(Server.MapPath("../Content/test.pdf"), FileMode.Create)); 
    document.Open(); 
    string strHTML = "<B>I Love ASP.Net!</B>"; 
    HTMLWorker htmlWorker = new HTMLWorker(document); 
    htmlWorker.Parse(new StringReader(strHTML)); 
    document.Close(); 

    return File(document, "application/pdf", Server.HtmlEncode(filename));//this doesnt work, obviously 
} 

Answer 1

使用FileStreamResult行动

public FileStreamResult Export(int? ID) 
{   
    MemoryStream stream = new MemoryStream(); 

    //Start of PDF work using iTextSharp PDF library 
    Document pdf = new Document(); 
    PdfWriter writer = PdfWriter.GetInstance(pdf, stream);  
    pdf.Open();  
    pdf.Add(new Phrase("test"));  
    pdf.Close(); 
    //End of PDF work using iTextSharp PDF library 

    //Where the download magic happens 
    Response.ContentType = "application/pdf"; 
    Response.AddHeader("content-disposition", "attachment;filename=Log.pdf"); 
    Response.Buffer = true; 
    Response.Clear(); 
    Response.OutputStream.Write(stream.GetBuffer(), 0, stream.GetBuffer().Length); 
    Response.OutputStream.Flush(); 
    Response.End(); 

    return new FileStreamResult(Response.OutputStream, "application/pdf"); 
} 

Answer 2

你需要做这样的事情......

变化

PdfWriter.GetInstance(document, new FileStream(Server.MapPath("../Content/test.pdf"), FileMode.Create)); 

到

var memorystream ms = new memorystream; 
PdfWriter.GetInstance(document, ms); 

，然后在年底...

Response.Clear; 
Response.ContentType = "application/pdf"; 
Response.AddHeader("content-disposition", "attachment;filename=PDFFile.pdf"); 

ms.Write(Response.OutputStream);