Asp net core mvc download file

ASP.NET Core MVC provides a convenient way to download files from a web application. In this article, we will explore how to implement file download using ASP.NET Core MVC.

To begin with, let's create a new ASP.NET Core MVC project. Open Studio and select “Create a new project.” Choose the ASP.NET Core Web Application template and click “Next.” Give your project a name and click “Create.” Select the “Web Application (Model-View-Controller)” template and click “Create.”

Once the project is created, let's create a new controller called “DownloadController.” Right-click on the “Controllers” folder, select “Add,” and then “Controller.” Choose the “MVC Controller – Empty” template and name it “DownloadController.”

Inside the “DownloadController,” let's create an method called “DownloadFile.” This method will handle the file download request. Here's an example of how the code should look like:

DownloadController.cs


using Microsoft.AspNetCore.Mvc;
using System.IO;

public class DownloadController : Controller
{
    public  DownloadFile()
    {
        // Path to the file to be downloaded
         filePath = "path/to/file";

        // Read the file content into a byte array
        byte[] fileBytes = System.IO.File.ReadAllBytes(filePath);

        // Set the content type and file name
        string fileName = "example.pdf";
        string contentType = "application/pdf";

        //  the file as a byte array
        return File(fileBytes, contentType, fileName);
    }
}

In the above code, we first the path to the file that needs to be downloaded. Next, we read the file content into a byte array using the `ReadAllBytes` method of the `System.IO.File` class.

We then set the content type and file name for the response. In this example, we are assuming that the file is a PDF, so we set the content type to “application/pdf” and the file name to “example.pdf.”

Finally, we return the file as a byte array using the `File` method of the `Controller` class. This method takes the file content, content type, and file name as .

To test the file download functionality, let's create a view that contains a link to the “DownloadFile” action method. Create a new view called “Index” inside the “Views/Download” folder. Here's an example of how the code should look like:

Index.


@{
    ViewData["Title"] = "Download File";
}

Download File

Download

In the above code, we use the `asp-controller` and `asp-action` attributes to generate the URL for the “DownloadFile” action method. When the user clicks on the “Download” link, it will trigger the file download.

That's it! You have implemented file download functionality using ASP.NET Core MVC. When the user clicks on the “Download” link, the file specified in the controller action method will be downloaded.

Remember to replace the “path/to/file” with the actual path to the file you want to download. Also, make sure to set the correct content type and file name for the response.

I hope this article helps you understand how to download files using ASP.NET Core MVC. Happy coding!

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