ASP.NET – How to download files

ASH

5 years ago

In this post we will see how we can download files in ASP.NET. We will create a simple ASP.NET webpage to download files stored inside server folder. Users will be able to click on file name and download files directly. For this example we will use ASP.NET LinkText to create file names on the web page and get its text to download corresponding file stored in the folder. So let’s start.

DOWNLOAD SOURCE CODE.

In your Project solution create a folder named “files” and add 4-5 files as below. This files will be used for downloading:

ASP.NET How to download Files – Files to download

Create a new page in your ASP.NET project with name downloads.aspx and edit it as below:

downloads.aspx:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="downloads.aspx.cs" Inherits="WebApplication1.downloads" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Downloading Files in ASP.NET</title>
<link href="bootstrap.min.css" rel="stylesheet" />
<style>
body
{
padding:5px;
}
a
{
margin:5px;
color:#6a25dd;
text-decoration:none;
font-size:20px;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<div>
<h2>DOWNLOAD FILES IN ASP.NET</h2>
<hr />
<i>Click on file name to download it.</i>
<br /><br />
<asp:LinkButton runat="server" ID="wallpaper1" OnClick="linkdownload_Click" Text="Wallpaper1.jpg" />
<br />
<asp:LinkButton runat="server" ID="wallpaper2" OnClick="linkdownload_Click" Text="Wallpaper2.jpg" />
<br />
<asp:LinkButton runat="server" ID="wallpaper3" OnClick="linkdownload_Click" Text="Wallpaper3.jpg" />
<br />
<asp:LinkButton runat="server" ID="document1" OnClick="linkdownload_Click" Text="Document1.pdf" />
<br />
<asp:LinkButton runat="server" ID="document2" OnClick="linkdownload_Click" Text="Document2.pdf" />
</div>
</form>
</body>
</html>

And edit the code file as below:

downloads.aspx.cs:

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace WebApplication1
{
public partial class downloads : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{

}

protected void linkdownload_Click(object sender, EventArgs e)
{
var element = (LinkButton)sender;

String filename = element.Text.ToString();
String filepath = Server.MapPath("Files/" + filename);

Response.Clear();
Response.ClearHeaders();
Response.ClearContent();
Response.AddHeader("Content-Disposition", "attachment; filename=" + filename);
Response.Flush();

Response.TransmitFile(filepath);
Response.End();
}
}
}

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