ASP.Net Download File

by Online Tutorials Library July 14, 2022

ASP.NET Download File

ASP.NET provides implicit object Response and its methods to download file from the server. We can use these methods in our application to add a feature of downloading file from the server to the local machine.

Here, we are creating an example that allows us to download file.

ASP.NET Download File Example

// Default.aspx

 <%@ Page Title=”Home Page” Language=”C#” AutoEventWireup=”true”  CodeBehind=”Default.aspx.cs” Inherits=”FileDownloadExample._Default” %> <form id=”form1″ runat=”server”>     <p>         Click the button to download a file</p>     <asp:Button ID=”Button1″ runat=”server” OnClick=”Button1_Click” Text=”Download” />     <br />     <br />     <asp:Label ID=”Label1″ runat=”server”></asp:Label> </form> 

Code

// Default.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 FileDownloadExample {     public partial class _Default : Page     {         protected void Page_Load(object sender, EventArgs e)         {         }         protected void Button1_Click(object sender, EventArgs e)         {             string filePath = “C:\Users\Admi\Desktop\abc.txt”;             FileInfo file = new FileInfo(filePath);             if (file.Exists)             {                 // Clear Rsponse reference                 Response.Clear();                 // Add header by specifying file name                 Response.AddHeader(“Content-Disposition”, “attachment; filename=” + file.Name);                 // Add header for content length                 Response.AddHeader(“Content-Length”, file.Length.ToString());                 // Specify content type                 Response.ContentType = “text/plain”;                 // Clearing flush                 Response.Flush();                 // Transimiting file                 Response.TransmitFile(file.FullName);                 Response.End();             }             else Label1.Text = “Requested file is not available to download”;         }     } } 

Output:

ASP Net Downloadfile 1

This application will prompt a window to download the file from the server.

ASP Net Downloadfile 2

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// Default.aspx

Code

// Default.aspx.cs

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