笔记sssss

   if (Session["test"] != null)
           {
               string writeBack = Session["test"].ToString();
               string calscript = "document.getElementsByName('txttest')[0].value=" + writeBack;
               Page.ClientScript.RegisterStartupScript(this.GetType(), "txttest", calscript, true);
           }

          

        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            string t = Request.Form["txttest"];
            Session["test"] = t;
            string writeBack = Session["test"].ToString();
            string calscript = "document.getElementsByName('txttest')[0].value=" + writeBack;
            Page.ClientScript.RegisterStartupScript(this.GetType(), "txttest", calscript, true);
        }