显示ASP。然后用Response.WriteFile发送文件

i need to show an asp.net page with a message like "Your download will start soon..." then, i need to send a file with Response.WriteFile(myfile). The problem is that i insert my code into Page_LoadComplete, because i assume asp.net will show and rendere basic html, then in the code there is Response.WriteFile(strFullPath). The problem is that no html is rendered, and the file is transfered correctly ! How can i also show a simple html like "Your download is in progress" ... ?i need to show an asp.net page with a message l