Posted on: 5/19/2015 6:42:50 AM | Views : 647

Response.Write("<script>alert('OK');</script>"); HttpContext.Current.Response.Clear(); HttpContext.Current.Response.ClearHeaders(); HttpContext.Current.Response.Buffer = false; HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(Path.GetFileName(fileName), System.Text.Encoding.UTF8)); HttpContext.Current.Response.ContentType = "application/octet-stream"; HttpContext.Current.Response.WriteFile(fullPath); HttpContext.Current.Response.Flush(); HttpContext.Current.Response.End(); It seems that Clear() will clear all the data contents in the Response, however I wanna an alert dialog is popped up before another dialog of downloading a file is shown in front of clients, so how?

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