Displaying the files for a specific folder and allow the user to download them.

This is how to to list the files in a specific directory and allow the user to download the files.

ASPX:

            <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="2"
                ForeColor="#333333" GridLines="None" AllowPaging="True">
                <Columns>
                    <asp:TemplateField>
                        <ItemTemplate>
                            <asp:LinkButton ID="lnkdownload" runat="server" Text="Download" CommandName="Download"
                                CommandArgument='<%#Eval("FullName") +";" + Eval("Name") %>'></asp:LinkButton>
                        </ItemTemplate>
                    </asp:TemplateField>
                    <asp:BoundField DataField="Name" HeaderText="File Name" />
                    <asp:BoundField DataField="Length" HeaderText="Size (Bytes)" />
                </Columns>
                <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
                <RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
                <PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
                <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
                <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
                <EditRowStyle BackColor="#999999" />
                <AlternatingRowStyle BackColor="White" ForeColor="#284775" />
            </asp:GridView>

VB:

   Private Sub BindGrid()
        Dim DataDirectory As String = "~/Uploads"

        Dim files() As FileInfo = New DirectoryInfo(Server.MapPath(DataDirectory)).GetFiles
        GridView1.DataSource = files
        GridView1.DataBind()


    End Sub
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        If Not IsPostBack Then
            BindGrid()
        End If
    End Sub

    Private Sub Downloadfile(ByVal fileName As String, ByVal FullFilePath As String)
        Response.AddHeader("Content-Disposition", "attachment; filename=" & fileName)
        Response.TransmitFile(FullFilePath)
        Response.End()
    End Sub

    Protected Sub GridView1_RowCommand(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewCommandEventArgs) Handles GridView1.RowCommand
        If e.CommandName = "Download" Then
            Dim fileInfo() As String = e.CommandArgument.ToString().Split(";")
            Dim FileName As String = fileInfo(1)
            Dim FullPath As String = fileInfo(0)
            Downloadfile(FileName, FullPath)
        End If
    End Sub

    Protected Sub GridView1_PageIndexChanging(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewPageEventArgs) Handles GridView1.PageIndexChanging
        GridView1.PageIndex = e.NewPageIndex
        BindGrid()

    End Sub

Note: the mentioned code List the files from "Uploads" directory  , and so you may need to change the name of that folder based on your website, also the code can be extended to allow the user to Dynamicly selects the directory name to list its files.