I using save dialog class from dot net to open a a save dialog to let user save file to the local machine. But after that, my page stand there and do nothing for the rest of my process. I use below code to open a save dialog

Private Sub Browse_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Browse.Click

 Response.Clear()

         Response.AddHeader("Content-Disposition", "attachment; filename=A.txt")
         Response.AddHeader("Content-Length", file.Length.ToString())
         Response.ContentType = "application/octet-stream"
         Response.BinaryWrite(file)
         Response.Flush()
         Response.Close()

end sub

the html code is below:
<asp:Button id="Browse" runat="server"></asp:Button>

but after the file is save to loca machine and the save dialog is close, my page no response at all. May I know how to do a postback to the page after the save dialog is close. Or any way to continue the rest of my code?

Thanks so much.