kperelman

asked on 5/18/2011

vb.net download file

I have this code behind for my asp.net page:

Protected Sub Download_Button_Click(sender As Object, e As System.EventArgs) Handles Download_Button.Click

Response.ContentType = "image/jpeg"
Response.AppendHeader("Content-Disposition", "attachment; filename=boat.jpg")
Response.TransmitFile(Server.MapPath("~/images/boat.jpg"))
Response.End()
Stop
End Sub

The file gets downloaded but why does Stop not get reached?

Visual Basic.NET

Last Comment

kperelman

8/22/2022 - Mon

Nasir Razzaq

5/18/2011

What do you want the Stop to do? Is that a keyword(never seen) or a function call?

Rick

5/18/2011

Because of Response.End()

I don't think you need the 'Stop' anyway.

kperelman

5/18/2011

ASKER

Actually I just wanted the code to stop. I set a break point at the stop function but it never gets there?

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Nasir Razzaq

5/18/2011

Why stop? It will stop any way at the End Sub. Or do you want to Pause? Why?

kperelman

5/18/2011

ASKER

I have more code below but it never reaches it.

Nasir Razzaq

5/18/2011

Show us the full code.

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kperelman

5/18/2011

ASKER

I have a site master with a default page with a button and this is the default page code behind.

Partial Class _Default
Inherits System.Web.UI.Page

Protected Sub Button1_Click(sender As Object, e As System.EventArgs) Handles Button1.Click

Dim temp_value As Integer = 0

Response.ContentType = "image/jpeg"
Response.AppendHeader("Content-Disposition", "attachment; filename=boat.jpg")
Response.TransmitFile(Server.MapPath("~/images/boat.jpg"))
Response.End()

temp_value = temp_value + 1 '<-- this line has a breakpoint but the debugger does not stop here

End Sub
End Class

Nasir Razzaq

5/18/2011

Have you enabled debugging in web.config?

kperelman

5/18/2011

ASKER

Yes.

I can breakpoint at the line: Response.End()

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Rick

5/18/2011

Have you tried this?

With Response

.ContentType = "image/jpeg"
.AppendHeader("Content-Disposition", "attachment; filename=boat.jpg")
.TransmitFile(Server.MapPath("~/images/boat.jpg"))

temp_value = temp_value + 1

.End()

End

kperelman

5/18/2011

ASKER

rick_gwu:

Sorry but because I need to donwload a 2nd file in the vb after the

temp_value = temp_value + 1

your work around will not be a good solution.

Nasir Razzaq

5/19/2011

2nd file in the same code? That can not be seen in the full code that you posted.

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Rick

5/19/2011

I wasn't aware that you needed to download a second file... please explain what your requirements are in more detail.

If you're going to download n number of files, you could try something like this:

For i As Integer = 1 To n

   With Response
      .ContentType = "image/" & imgType
      .AppendHeader("Content-Disposition", "attachment; filename=" & img)
      .TransmitFile(Server.MapPath("~/images/" & img))
      .Clear()
   End With

   temp_value = temp_value + 1

Next

Response.End()

Open in new window

Rick

5/19/2011

I meant,

For i as Integer = 0 to n

Rick

5/19/2011

If you only have 2 files, try this:

With Response

   .ContentType = "image/jpeg"
   .AppendHeader("Content-Disposition", "attachment; filename=boat.jpg")
   .TransmitFile(Server.MapPath("~/images/boat.jpg"))
   .ClearHeaders()

   temp_value += 1

   .AppendHeader("Content-Disposition", "attachment; filename=jetski.jpg")
   .TransmitFile(Server.MapPath("~/images/jetski.jpg"))

   temp_value += 1

   .End()

End With

Open in new window

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kperelman

5/19/2011

ASKER

I tried this. I get prompted and can download boat1 but I am not prompted for boat2?

Response.ContentType = "image/jpeg"
Response.AppendHeader("Content-Disposition", "attachment; filename=boat.jpg")
Response.TransmitFile(Server.MapPath("~/images/boat.jpg"))
Response.Clear()
Response.AppendHeader("Content-Disposition", "attachment; filename=boat2.jpg")
Response.TransmitFile(Server.MapPath("~/images/boat.jpg"))
Response.End()

SOLUTION

Nasir Razzaq

5/20/2011

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Rick

5/20/2011

Try .ClearHeaders()

Response.ContentType = "image/jpeg"
Response.AppendHeader("Content-Disposition", "attachment; filename=boat.jpg")
Response.TransmitFile(Server.MapPath("~/images/boat.jpg"))
Response.ClearHeaders()
Response.AppendHeader("Content-Disposition", "attachment; filename=boat2.jpg")
Response.TransmitFile(Server.MapPath("~/images/boat.jpg"))
Response.End()

ASKER CERTIFIED SOLUTION

Rick

5/20/2011

THIS SOLUTION ONLY AVAILABLE TO MEMBERS.

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kperelman

5/20/2011

ASKER

I copied your clearheaders() code but it did not work. Only the second file was created.

The code to download 2 files with a button click is what you have.

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kperelman

5/23/2011

ASKER

Here is all of the code:

site master page:
<%@ Master Language="VB" AutoEventWireup="false" CodeFile="Site.Master.vb" Inherits="Site" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head runat="server">
<title></title>
</head>
<body>
<form runat="server">
<div class="main">
<asp:ContentPlaceHolder ID="MainContent" runat="server"/>
</div>
</form>
</body>
</html>

default page:
<%@ Page Title="Home Page" Language="VB" MasterPageFile="~/Site.Master" AutoEventWireup="false"
CodeFile="Default.aspx.vb" Inherits="_Default" %>

<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
<asp:Button ID="Button1" runat="server" Text="Button" />
</asp:Content>

default page code behind:

Imports System.IO
Partial Class _Default
Inherits System.Web.UI.Page
Protected Sub Button1_Click(sender As Object, e As System.EventArgs) Handles Button1.Click
Response.ContentType = "image/jpeg"
Response.AppendHeader("Content-Disposition", "attachment; filename=boat.jpg")
Response.TransmitFile(Server.MapPath("~/images/boat.jpg"))
Response.ClearHeaders()
Response.AppendHeader("Content-Disposition", "attachment; filename=boat2.jpg")
Response.TransmitFile(Server.MapPath("~/images/boat2.jpg"))
Response.End()
End Sub
End Class

kperelman

5/23/2011

ASKER

So does this code work for you?