ASP.NET

<br />
  foreach (Promotion promotion in promotions)<br />
        {<br />
            button = new Button();<br />
            button.ID = "button" + i;<br />
            button.CssClass = "ContextMenuItem";<br />
            button.OnClientClick = "javascript:function(this);";<br />
            i++;<br />
            button.Text = promotion.Value.ToString();<br />
            ValueListPanel.Controls.Add(button);<br />
        }

<object id="Object" style="left: 1px; position: absolute; top: 1px" height="1">
        width="1" classid="Classes.dll#Classes.Class1" viewastext>
</object>

string path = Server.MapPath("Movie/movie.zip");
        
        System.IO.FileInfo file = new System.IO.FileInfo(path);

        if (file.Exists)
        {
            Response.Clear();

            Response.AddHeader("Content-Disposition", "attachment; filename=" + file.Name);

            Response.AddHeader("Content-Length", file.Length.ToString());

            Response.ContentType = "application/zip";

            Response.WriteFile(file.FullName);

            Response.End();
          }