How to make function make download file from path on asp.net core 2.2?

Question

I work on project use .net core 2.2 visual studio 2017 Web API

I Need to make function download file

Give function path of file will be download and download file and return Void .

I need to make function do download file on .net core 2.2 to reuse it inside action controllers .

public void DownloadOutPut(string path)
{
    try
    {


        if (path != "")
        {


            System.IO.FileInfo file = new System.IO.FileInfo(path);
            if (file.Exists)
            {

                Response.Clear();
                Response.ContentType = "application/octet-stream";
                Response.AppendHeader("Content-Disposition", "attachment;filename = " + file.Name + "");
                Response.TransmitFile(path);


            }

            Response.End();
        }
    }
    catch (Exception ex)
    {

        throw;
    }
}

above done on asp.net web form I need to do function similar to it but on .net core 2.2

so How to do it please ?

What the `path` would be? an URL of the file? Path of the file on the server or client? — Chetan, Nov 18 '20 at 01:00
Does this answer your question? [How to download a file in ASP.NET Core](https://stackoverflow.com/questions/45727856/how-to-download-a-file-in-asp-net-core) — Chetan, Nov 18 '20 at 01:10
https://medium.com/@tsafadi/download-a-file-with-asp-net-core-e23e8b198f74 — Chetan, Nov 18 '20 at 01:11
only one question if i need to make download file downloaded on download folder and display as afile on browser this will be related to Web api or client side angular or jquery — ahmed barbary, Nov 20 '20 at 23:07

score 1 · Accepted Answer · answered Nov 18 '20 at 01:18

I assume you are receiving a mapped path and the file is placed on your server.

public FileStreamResult DownloadFile(string path)
{
    var filename = System.IO.Path.GetFileName(path);
    var mimeType = "application/octet-stream";
    var stream = System.IO.File.OpenRead(path);

    return new FileStreamResult(stream, mimeType) { FileDownloadName = filename };
}

For mimetypes I found this SO answer helpful.

How to make function make download file from path on asp.net core 2.2?

1 Answers1