Descarga de archivo

[jaullo]

Hola, como estas recuperando el archivo. Lo muestras en un gridview o como? Si es asi esta seria una forma

Código ASP:

Dim ib As ImageButton = DirectCast(sender, ImageButton)
        Dim index As Integer = Convert.ToInt32(ib.CommandArgument)
        Dim lb As LinkButton = DirectCast(gvwFiles.Rows(index).FindControl("gvlnkName"), LinkButton)
        Session("DownloadFileName") = lb.CommandArgument
        Response.Redirect("~/Download/Download.aspx")
 

Y la pagina Download.aspx, conteniendo esto

Código ASP:

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Try
            ' retrieve the path of the file to download, and create
            ' a FileInfo object to read its properties
            ' string path = Server.MapPath(Request.QueryString["File"]);
            Dim path As String = Session("DownloadFileName").ToString()
            Session("DownloadFileName") = Nothing
 
            Dim file As New System.IO.FileInfo(path)
 
            ' clear the current output content from the buffer
            Response.Clear()
 
            ' add the header that specifies the default filename for the Download/SaveAs dialog
            Response.AddHeader("Content-Disposition", "attachment; filename=" + file.Name)
            ' add the header that specifies the file size, so that the browser
            ' can show the download progress
            Response.AddHeader("Content-Length", file.Length.ToString())
            ' specify that the response is a stream that cannot be read by the
            ' client and must be downloaded
            Response.ContentType = "application/octet-stream"
            ' send the file stream to the client
            Response.WriteFile(file.FullName)
            ' stop the execution of this page
            Response.[End]()
 
        Catch generatedExceptionName As Exception
            Response.Write("<p style=""color:red;font-size=20px;font-weight:bold"">Invalid download session</p>")
        End Try
 

Igualmente puedes mapear el archivo directamente
con un

Código ASP:

Server.mappath("/archivo.doc")
 

y enviarlo a descargar