Protect files for download

<appSettings>
    <add key="uploadDirectory" value="uploads" />
</appSettings>

8. Then, you just have to write the function for download. (see using the code section)

Using the code

A brief description of how to use the article or code. The class names, the methods and properties, any tricks or tips.

Blocks of code should be set as style "Formatted" like this:

Private Sub LinkButton1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles LinkButton1.Click
    downloadfile("document.pdf") '
End Sub


'This is the function that you have to use
Private Function downloadfile(ByVal strFile As String)
    Dim fs As FileStream
    Dim strContentType As String
    ' This is the important part, because you going to use the local path 
    'to get the file
    Dim strPath = Me.Server.MapPath(System.Configuration.ConfigurationSettings.AppSettings("uploadDirectory")) & "\"
    Dim strFileName As String = strFile
    fs = File.Open(strPath & strFileName, FileMode.Open)
    Dim bytBytes(fs.Length) As Byte
    fs.Read(bytBytes, 0, fs.Length)
    fs.Close()
    Response.AddHeader("Content-disposition","attachment; filename=" & strFileName)
    Response.ContentType = "application/octet-stream"
    Response.BinaryWrite(bytBytes)
    Response.End()
    Return True
End Function

I tested this function with a file size of 300 MB and works fine!, but with a file of 650 MB we have some problems (memory problems).

If all works file you have to see this screen

Points of Interest

For Upload files to your site follow this links, this is another function that I made before
and can help... (cruzagr3 source code)

http://www.soloasp.com.ar/vermensaje2.asp?idmensaje=23643&idforo=3

History

I will be adding another thing soon...