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How can Download uploaded files in MVC ?

Anonymous User 1479 02-Aug-2018

Use Simple C# code for Download operation in MVC.

Don't use ajax script for downloads.

asp.net mvc c#  asp.net mvc  mvc  mvc4 
Updated on 18-Jun-2023
Anonymous User

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2 Answers

Aryan Kumar

Aryan Kumar

18-Jun-2023

Sure, here are the steps on how to download uploaded files in MVC:

  1. Create a controller that handles the download request.
  2. Create a view that renders the download link.
  3. Implement the download logic in the controller.
  4. Configure the MVC routing to map the download request to the controller action.

Here is an example of how to download an uploaded file in MVC:

C#

public class FileController : Controller
{
  public ActionResult Download(string fileName)
  {
    // Get the file from the file system.
    var file = HttpContext.Current.Server.MapPath("~/Uploads/" + fileName);

    // Create a file stream.
    var stream = new FileStream(file, FileMode.Open, FileAccess.Read);

    // Create a file result.
    var result = File(stream, ContentType.ApplicationOctetStream, fileName);

    // Return the file result.
    return result;
  }
}

This code will create a controller action that can be used to download an uploaded file. The action takes a file name as a parameter and returns a file result. The file result will contain the file stream and the content type of the file.

The view that renders the download link should have a link that points to the controller action. The link should have the file name as the href attribute. For example, the following code shows how to render a download link in a view:

HTML

<a href="/FileController/Download?fileName=myfile.pdf">Download</a>

This code will render a link that points to the Download action in the FileController controller. The href attribute of the link will contain the file name myfile.pdf.

The MVC routing needs to be configured to map the download request to the controller action. The following code shows how to configure the MVC routing:

Code snippet

routes.MapRoute(
    name: "DownloadFile",
    url: "/Download/{fileName}",
    defaults: new { controller = "FileController", action = "Download" });

This code will map the /Download/{fileName} URL to the Download action in the FileController controller. The fileName parameter will be passed to the controller action as a parameter.

I hope this helps! Let me know if you have other questions.

Anonymous User

Anonymous User

03-Aug-2018

4). Add a Download button (or Link button) in IndexView Page for download saved files. For this action, we can define only the ActionMethod for download. 

ActionMethod for Download

//---------------Download Files-------------//



        public ActionResult Downloads(int customerID)

        {

            Customer model = AP.Customers.FirstOrDefault(x => x.CustomerID == customerID);



            if (model != null)

            {

                if (System.IO.File.Exists(Server.MapPath(resolveVirtual(model.UploadFiles))))

                {

                    string fileName = Path.GetFileName(resolveVirtual(model.UploadFiles));

                    byte[] fileBytes = System.IO.File.ReadAllBytes(Server.MapPath(resolveVirtual(model.UploadFiles)).ToString());

                    return File(fileBytes, System.Net.Mime.MediaTypeNames.Application.Octet, fileName);

                }

            }

                 

            return null;

        }



        public static string resolveVirtual(string physicalPath)

        {

            string url = physicalPath.Substring(System.Web.HttpContext.Current.Server.MapPath("~").Length).Replace('\\', '/').Insert(0, "~/");

            return (url);

        }

5). Work on IndexViewPage.

@using (Html.BeginForm("DownloadFile", "Controller", FormMethod.Get)){}

How can Download uploaded files in MVC ?


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