How to Download any file to the Browser in ASP.NET using VB.NET

Introduction
 
Following article is simply showing that how you can Download any type of file to the Browser. In which using Streams you can provide a file to the user for without the need for FTP or any interference of the Internet Information Server (IIS), when you will create your Web application you have also add a folder to your application that include the file you want to download.

Getting Started

• First you simply create a new ASP.NET web application. 
• Now right click on your project in solution explorer and click add new folder. A folder will be added to your projectgive name images to the folder. Now any file that you want to download copy and paste in this folder as I have added a file named (StateManagement.ppt). 
• Specify the folder name and file name in the code's link tag. 
• Now write the below code in Default.aspx.
  
  <a href="images/StateManagement.ppt">Download the file</a>
  <%@ Page language="vb" runat="server" explicit="true" strict="true" %>
  <script language="vb" runat="server">
  Sub Page_Load(Sender As Object, E As EventArgs)
         Dim strRequest As String = Request.QueryString("file")
         If strRequest <> "" Then
                Dim path As String = Server.MapPath(strRequest)
                Dim file As System.IO.FileInfo = New System.IO.FileInfo(path)
                If file.Exists Then
                       Response.Clear()
                       Response.AddHeader("Content-Disposition", "attachment; filename=" & file.Name)
                       Response.AddHeader("Content-Length", file.Length.ToString())
                       Response.ContentType = "application/octet-stream"
                       Response.WriteFile(file.FullName)
                       Response.End
                Else
                       Response.Write("This file does not exist.")
                End If
         Else
              Response.Write("Click link to download.")
         End If
  End Sub
  </script>
   
• The Design mode of the Default.aspx page will look like below.
  
  
   
• Now run your application.

Output:-













Summary