asp.net 绑定GridView求高手帮忙解答啊！！谢谢

Question

            代码没什么问题，如果只有一条记录完全没问题，可是多条时我想追加上去，实在是做不到啊，求大侠们帮帮我啊
            ArrayList list = new ArrayList();
            foreach (GridViewRow row in GridView1.Rows) 
            {
                CheckBox myCheck = (CheckBox)row.FindControl("CBSelect"); 
                if (myCheck != null) 
                { 
                    if (myCheck.Checked == true) 
                    {
                        list.Add(myCheck.Text);
                       
                    } 
                } 
            }
            for (int i = 0; i < list.Count; i++)
            { 
                string BeginTime = this.txtBeginTime.Value.Trim().ToString();
                BeginTime = BeginTime.Replace(@"\", "-");
                string EndTime = this.txtEndTime.Value.Trim().ToString();
                EndTime = EndTime.Replace(@"\", "-");
                if (BeginTime != "" && EndTime != "" || list[i].ToString() != "")
                {
                    DataTable dt = WebServices.GetSUMIPQCcENNameList(BeginTime, EndTime, list[i].ToString());
                    if (dt.Rows.Count > 0)
                    {
                        this.TableView.DataSource = dt;
                        this.TableView.DataBind();
             
                    }
                    for (int j = 0; j < arrlist.Count; j++)
                    {
                        DataRow rowslist = dt.NewRow();
                        rowslist[""]
                    }
                    if (TableView.Rows.Count < 1)
                    {
                        if (dt.Rows.Count > 0)
                        {
                            this._simpleTableListView.DataSource = dt;
                            this._simpleTableListView.DataBind();
                        }                    }
                    else
                    {
                        DataRow newRow = dt.NewRow();
                        newRow["cCHNameList"] = dt.Rows[0]["cCHNameList"].ToString();
                        newRow["SumDefective"] = dt.Rows[0]["SumDefective"].ToString();
                        newRow["Defective"] = dt.Rows[0]["Defective"].ToString();
                        dt.Rows.Add(newRow);
                        this.TableView.DataSource = dt;
                        this.TableView.DataBind();                    }

Answer 1

web页面定义的全局list在刷新后就没有了，你可以用viewstate保存list 

Answer 2

非常感谢你的回答，不过那个ViewState我不太熟悉，能指点下吗？ViewState能追加数据？？

Answer 3

ViewState就是个保存页面数据的东西。类似于Session这种 
不过ViewState在关闭这个页面后就没有了。Session是关闭浏览器没有了。只是用来保存你Arraylist的值的

Answer 4

/// <summary>
    /// 视图
    /// </summary>
    private DataTable GridViewSource
    {
        get
        {
            if (ViewState["List"] == null)
            {
                DataTable dt = new DataTable();                dt.Columns.Add(new DataColumn("StockName", typeof(string)));
                dt.Columns.Add(new DataColumn("GoodsNO", typeof(string)));
                dt.Columns.Add(new DataColumn("_Name", typeof(string)));
                dt.Columns.Add(new DataColumn("Spec", typeof(string)));                ViewState["List"] = dt;
            }
            return (DataTable)ViewState["List"];
        }
        set
        {
            ViewState["List"] = value;
        }
    }
    /// <summary>
    /// 添加空白信息
    /// </summary>
    private void AddEmpty()
    {
        DataTable dt = GridViewSource;
        DataRow tr = dt.NewRow();
        tr[0] = "";
        tr[1] = "";
        tr[2] = "";
        tr[3] = "";        dt.Rows.Add(tr);
        GridViewSource = dt;        gvdata.DataSource = GridViewSource;//绑定到数据源控件
        gvdata.DataBind();
    }
    /// <summary>
    /// 添加数据，绑定到数据源
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    public void AddData()
    {
        DataTable dt = GridViewSource;        DataRow tr = dt.NewRow();
        tr[0] = "自定义内容1";
        tr[1] = "自定义内容2";
        tr[2] = "自定义内容3";
        tr[3] = "自定义内容4";
        dt.Rows.Add(tr);        gvdata.DataSource = GridViewSource;//绑定到数据源控件
        gvdata.DataBind();    }