小编Tus*_*har的帖子

在我的代码中,我想在下载pdf之后重定向到thankyou.html页面,以便我在该方法中创建download()我编写代码

protected void download()
    {
        try
        {
            string path = Server.MapPath("pdf/myDoc.pdf");   
            System.IO.FileInfo file = new System.IO.FileInfo(path);
            if (file.Exists)
            {
                string strURL = path;
                WebClient req = new WebClient();

                Response.Clear();
                Response.ClearContent();
                Response.ClearHeaders();
                Response.Buffer = true;
                Response.AddHeader("Content-Disposition", "attachment;filename=\"myDoc.pdf\"");
                byte[] data = req.DownloadData(path);
                Response.BinaryWrite(data);
                Response.Flush();

                Response.Redirect("thankyou.html");
            }                
            else
            {
                Response.Write("This file does not exist.");
            }
        }
        catch (Exception ex)
        {
            ScriptManager.RegisterStartupScript(this, GetType(), "showalert", "alert('" + ex.Message.ToString() + "');", true);
        }
    }

但它显示我无法评估表达式,因为代码已优化或本机框位于调用堆栈之上且当Response.Redirect("thankyou.html"); 在外面它显示我错误在HTTP标头发送后无法重定向. 你能指导我如何重定向到另一个页面吗？