C# – ASP.Net Core Content-Disposition attachment/inline

asp.net-corec

I am returning a file from a WebAPI controller. The Content-Disposition header value is automatically set to "attachment". For example:

Disposition: attachment; filename="30956.pdf"; filename*=UTF-8''30956.pdf

When it is set to attachment the browser will ask to save file instead of opening it. I would like it to open it.

How can I set it to "inline" instead of "attachment"?

I am sending the file using this method:

public IActionResult GetDocument(int id)
{
    var filename = $"folder/{id}.pdf";
    var fileContentResult = new FileContentResult(File.ReadAllBytes(filename), "application/pdf")
    {
        FileDownloadName = $"{id}.pdf"
    };
    // I need to delete file after me
    System.IO.File.Delete(filename);

    return fileContentResult;
}

Best Answer

The best way I have found is to add the content-disposition headers manually.

private IActionResult GetFile(int id)
{
       var file = $"folder/{id}.pdf";

       // Response...
       System.Net.Mime.ContentDisposition cd = new System.Net.Mime.ContentDisposition
       {
              FileName = file,
              Inline = displayInline  // false = prompt the user for downloading;  true = browser to try to show the file inline
       };
       Response.Headers.Add("Content-Disposition", cd.ToString());
       Response.Headers.Add("X-Content-Type-Options", "nosniff");

       return File(System.IO.File.ReadAllBytes(file), "application/pdf");
}

Related Solutions

C# – File Upload ASP.NET MVC 3.0

You don't use a file input control. Server side controls are not used in ASP.NET MVC. Checkout the following blog post which illustrates how to achieve this in ASP.NET MVC.

So you would start by creating an HTML form which would contain a file input:

@using (Html.BeginForm("Index", "Home", FormMethod.Post, new { enctype = "multipart/form-data" }))
{
    <input type="file" name="file" />
    <input type="submit" value="OK" />
}

and then you would have a controller to handle the upload:

public class HomeController : Controller
{
    // This action renders the form
    public ActionResult Index()
    {
        return View();
    }

    // This action handles the form POST and the upload
    [HttpPost]
    public ActionResult Index(HttpPostedFileBase file)
    {
        // Verify that the user selected a file
        if (file != null && file.ContentLength > 0) 
        {
            // extract only the filename
            var fileName = Path.GetFileName(file.FileName);
            // store the file inside ~/App_Data/uploads folder
            var path = Path.Combine(Server.MapPath("~/App_Data/uploads"), fileName);
            file.SaveAs(path);
        }
        // redirect back to the index action to show the form once again
        return RedirectToAction("Index");        
    }
}

Windows – SWT application crashes in Windows 7

I have resolved this problem after asking the same question.

You must either remove SWT.VIRTUAL or update to the SVN build of SWT. I've posted a bug report on the SWT bug page.

Edit: your code snippet has a bug in it that is causing the ArrayIndexOutOfBoundsException. You can resolve it by changing lines containing listenerSD:

public void handleEvent(Event event) {
    Collection<?> collectionW = (Collection<?>) event.widget
            .getData(DATA_COLLECTION);
    if (collectionW.size() > event.index) {
        Object object = collectionW
                .toArray(new Object[collectionW.size()])[event.index];
        ((TableItem) event.item).setText(0, object
                .toString());
    }
}

Best Answer

Related Solutions

C# – File Upload ASP.NET MVC 3.0

Windows – SWT application crashes in Windows 7

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