ASP.NET MVC FileStreamResult，不使用fileDownloadName [英] ASP.NET MVC FileStreamResult, fileDownloadName is not used

问题描述

下面返回该浏览器尝试直接显示内嵌的PDF文件。这正常工作。但是，如果我尝试下载该文件，下载的名称不是myPDF.pdf，而是在路由（MyApp的/控制器/的pdfGenerator / ID）的ID。是否有可能设置文件下载名称为myPDF.pdf？

 公共FileStreamResult的pdfGenerator（INT ID）
{
    的MemoryStream毫秒​​= GeneratePDF（ID）;    字节[] =文件ms.ToArray（）;
    MemoryStream的输出=新的MemoryStream（）;
    output.Write（文件，0，file.Length）;
    output.Position = 0;
    HttpContext.Response.AddHeader（内容处置，
    内联;文件名= myPDF.pdf）;    返回文件（输出应用程序/ PDF，fileDownloadName =myPDF.pdf）;
}
 

解决方案

没有，这是不可能用PDF内嵌显示。你可以做到这一点，如果你发送的内容处理标头作为附件：

 公众的ActionResult的pdfGenerator（INT ID）
{
    流流= GeneratePDF（ID）;
    返回文件（流应用程序/ PDF，myPDF.pdf）;
}
 

还要注意我如何删除不必要的的MemoryStream 你正在使用和加载在内存中的PDF在那里你可以把它直接传输到客户端这将有更为高效

The following returns a PDF which the browser tries to directly display inline. This works correctly. However, if I try to download the file, the download name is not "myPDF.pdf", but instead the ID in the route (myapp/controller/PDFGenerator/ID). Is it possible to set the file download name to be "myPDF.pdf"?

public FileStreamResult PDFGenerator(int id)
{
    MemoryStream ms = GeneratePDF(id);

    byte[] file = ms.ToArray();
    MemoryStream output = new MemoryStream();
    output.Write(file, 0, file.Length);
    output.Position = 0;
    HttpContext.Response.AddHeader("content-disposition", 
    "inline; filename=myPDF.pdf");

    return File(output, "application/pdf", fileDownloadName="myPDF.pdf");
}

解决方案

No, this is not possible with a PDF displayed inline. You could achieve this if you send the Content-Disposition header with as an attachment:

public ActionResult PDFGenerator(int id)
{
    Stream stream = GeneratePDF(id);
    return File(stream, "application/pdf", "myPDF.pdf");
}

Also notice how I removed the unnecessary MemoryStream you were using and loading the PDF in memory where you could have directly streamed it to the client which would have been far more efficient.

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