服务器端javascript弹出对话框和文件、目录操作

//服务器弹出对话框
 if (lcSID == "1" && (txtNsp.Text.Trim() != lcNewspaper || Convert.ToDateTime(txtNspdate.Text.Trim()) != Convert.ToDateTime(lcNspdate)))
        {
            string lcJs = "var varname = window.confirm(\"数据不一致，系统记录报纸是 " + ViewState["lcNewspaper"].ToString() + ",时间是" + ViewState["lcNspdate"].ToString() +"\\n\\n\\n是否报告错误？“确认”提交报告并通知主管，“取消”重新录入\"); if (varname==true) {window.location='y_pdfcode5.aspx?MID=" + lcMID + "';};";
            lcJs = "<script>" + lcJs + "</script>";
            ClientScript.RegisterStartupScript(this.GetType(), "clear", lcJs);
            return;
        }
//服务器端复制文件
 if (File.Exists(path + "\\" + txtSoawp.Text.Trim() + ".pdf") == true)
                {
                    //File.Copy(Server.MapPath("被复制的文件相对路径"), Server.MapPath("目的位置相对路径"), true);
                    File.Copy(@"c:\tmp\1.pdf", path + "\\" + txtSoawp.Text.Trim() + ".pdf", true);
                }
                else
                {
                    File.Move