Asp Net Mvc Download File
In WebForms, I would normally have code like this to let the browser present a 'Download File' popup with an arbitrary file type, like a PDF, and a filename:
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Upload/Download Files in ASP.NET Core 2.0 ASP.NET Core 2.0 MVC Model Validation ASP.NET Core 2.0 Bearer Authentication Consuming ASP.NET Core 2.0 Web API using HttpClient ASP.NET Core 2.0 Cookie Authentication Identity Server 4 with ASP.NET Core 2.0 ASP.NET Core 2.0 MVC Model Binding. Jan 07, 2016 Mukesh_Kumar. Hi, rohitpundlik Download file in mvc using ajax @MikesDotnetting has written a good article on this How to upload and download the file in.
How to download pictures from cell phone. How do I accomplish the same task in ASP.NET MVC?
7 Answers
Return a FileResult
or FileStreamResult
from your action, depending on whether the file exists or you create it on the fly.
To force the download of a PDF file, instead of being handled by the browser's PDF plugin:
If you want to let the browser handle by its default behavior (plugin or download), just send two parameters.
You'll need to use the third parameter to specify a name for the file on the browser dialog.
UPDATE: Charlino is right, when passing the third parameter (download filename) Content-Disposition: attachment;
gets added to the Http Response Header. My solution was to send applicationforce-download
as the mime-type, but this generates a problem with the filename of the download so the third parameter is required to send a good filename, therefore eliminating the need to force a download.
You can do the same in Razor or in the Controller, like so.
Or in the Controller.
I tried this in Chrome and IE9, both is downloading the pdf file.
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I probably should add I am using RazorPDF to generate my PDFs. Here is a blog about it: http://nyveldt.com/blog/post/Introducing-RazorPDF
You should look at the File method of the Controller. This is exactly what it's for. It returns a FilePathResult instead of an ActionResult.
Although standard action results FileContentResult or FileStreamResult may be used for downloading files, for reusability, creating a custom action result might be the best solution.
As an example let's create a custom action result for exporting data to Excel files on the fly for download.
ExcelResult class inherits abstract ActionResult class and overrides the ExecuteResult method.
We are using FastMember package for creating DataTable from IEnumerable object and ClosedXML package for creating Excel file from the DataTable.
In the Controller use the custom ExcelResult action result as follows
Since we are downloading the file using HttpGet, create an empty View without model and empty layout.
Asp.net Mvc Download File Javascript
Blog post about custom action result for downloading files that are created on the fly: