Create an Asp.NET Core MVC Project

Assuming you have Visual Studio 2019 or Visual Studio 2022 installed, follow these steps to create a new ASP.NET Core Project

• Open the visual studio (IDE).
• Click on the “Create new project” option.
• Choose “ASP.NET Core Web Application” from the list of available templates.
• Click the Next button.
• Then configure a new project, and specify the name and location of your project.
• Click the “Next” button.
• Then select .Net Core as the runtime and choose the version from the dropdown list at the top.
• Make sure to uncheck the checkboxes for “Enable Docker Support” and “Configure for HTTPS” since we won’t be using authentication.
• Click the “Create” button

Open the HomeController.cs file. Create a new method named download:

        public IActionResult download(string Filename)
        {
            var stringpath = Path.Combine(this._env.WebRootPath + Filename);
            byte[] bytes = System.IO.File.ReadAllBytes(stringpath);
             
            return File(bytes, "application/octet-stream", Filename);
        }

ASP.NET Core provides four file-related response classes that implement the ActionResult interface.

• FileContentResult:
• FileStreamResult:
• VirtualFileResult:
• PhysicalFileResult

The FileResult class is an abstract base class for all file-related response classes in ASP.NET Core. The specific class you use to return a file to the browser depends on how to provide the file content and from where.

• FileContentResult and  FileStreamResult can be used to return files from virtual paths within your web application.
• PhysicalFileResult can be used to return a file from the absolute file path.

Open the View Index.cshtml file and add the following code.

@model IEnumerable<WebApplication_Download_Files.Models.FileAssets>
@{
    ViewData["Title"] = "Home Page";
}

<div class="text-center">
    <h1 class="display-4">File List to Download</h1>


    <table class="table">
        <thead>
            <tr>
                <th>
                    @Html.DisplayNameFor(model => model.Filename)
                </th>
                <th>
                    Action
                </th>
                <th></th>
            </tr>
        </thead>
        <tbody>
            @foreach (var item in Model)
            {
                <tr>
                    <td>
                        @Html.DisplayFor(modelItem => item.Filename)
                    </td>
                    
                    <td>
                        @Html.ActionLink("Download File","download",new{Filename = item.FileUrls  } )                        
                    </td>
                </tr>
            }
        </tbody>
    </table>
</div>

Output

See Also:

Conditionally add middleware in ASP.NET Core

The post How to download files using ASP.NET Core MVC appeared first on Tech Insights.