关于浏览器后退时保存数据、

浏览器后退方法history.go(-1);和history.back()都可以将浏览器后退一个页面,可是如果要像百度做的那样返回时还要保持原来
所有的状态,也就是说,后退时保持原页面的所有数据,比如文本框,下拉框的值的话.那用这两个方法貌似是行不通的了.这两天写了个
session保存并取出数据的方法.如下:
首先是PageLoad里面的代码:

            if (string.IsNullOrEmpty(Request["save"]))
                {
                    //如果重新進入會員維護，則會員維護各界面的過濾條件設置為空
                    Dictionary<string, string> dt = new Dictionary<string, string>();
                    if (Session["MAH001_Status"] != null)
                        dt = Session["MAH001_Status"] as Dictionary<string, string>;

                    dt["MAH001"] = "";
                    Session["MAH001_Status"] = dt;
                }
                else
                {
                    string[] arrCond = GetFormCondition();
                    int idx = 0;
                    if (arrCond.Length == 0)
                        idx = 0;
                    else if (!int.TryParse(arrCond[0], out idx))
                        idx = 0;

                    GridViewVip.PageIndex = idx;

                    txtName.Text = arrCond[1];
                    ddlSex.SelectedValue = arrCond[2];
                    ddlMarried.SelectedValue = arrCond[3];
                    //UCCity1.CountyValue = arrCond[4];
                    //UCCity1.CityValue = arrCond[5];
                    ddlStatus.SelectedValue = arrCond[6];
                    txtBCreateDate.Text = arrCond[7];
                    txtECreateDate.Text = arrCond[8];
                }

以下是保存session和取出session分割的方法:

/// <summary>
        /// 獲取保存在Session中的當前書面的過濾條件
        /// </summary>
        /// <returns>MAH001.aspx書面的過濾條件數組</returns>
        public string[] GetFormCondition()
        {
            string[] arrPart = new string[0];

            object obj = Session["MAH001_Status"];
            if (obj != null)
            {
                Dictionary<string, string> dt = obj as Dictionary<string, string>;
                if (dt.ContainsKey("MAH001"))
                {
                    string strCond = dt["MAH001"];
                    arrPart = strCond.Split("|".ToCharArray());
                    for (int i = 0; i < arrPart.Length; i++)
                        arrPart[i] = arrPart[i].Trim();
                }
            }

            return arrPart;
        }

        /// <summary>
        ///  將當前書面的過濾條件存入Session
        /// </summary>
        public void SetFormCondition()
        {
            string strST_01 = string.Format("{0}|{1}|{2}|{3}|{4}|{5}|{6}|{7}|{8}", GridViewVip.PageIndex,
                                                                               txtName.Text,
                                                                               ddlSex.SelectedValue,
                                                                               ddlMarried.SelectedValue,
                                                                               UCCity1.CountyValue,
                                                                               UCCity1.CityValue,
                                                                               ddlStatus.SelectedValue,
                                                                               txtBCreateDate.Text,
                                                                               txtECreateDate.Text
                                                                               );

            Dictionary<string, string> dt = new Dictionary<string, string>();
            if (Session["MAH001_Status"] != null)
                dt = Session["MAH001_Status"] as Dictionary<string, string>;

            dt["MAH001"] = strST_01;

            Session["MAH001_Status"] = dt;
        }