Download file to browser using .NET Core Razor Pages

Question

Using ASP.NET Razor Pages, I am trying download a file to the browser. From the Page(html), using a link like this works fine:

href=\"/DownloadableFiles/testB.cs         


        

Answer 1

pitaridis is correct, return File exists in Razor Pages, I must have been missing a namespace. This will download a file from Code Behind:

In the page, here's the submit button:

<button type="submit" asp-page-handler="DownloadFile" style="width:75px" 
        class="cancel"> Download </button>

In the PageModel (code behind):

public ActionResult OnPostDownloadFile()
{
    return File("/DownloadableFiles/TestFile34.csv", "application/octet-stream", 
                "NewName34.csv");
}

Note: /DownloadableFiles is in a subfolder of wwwroot