GridView跨页多选

JS 前台：

//GridView中实现多选效果
function CheckAllC(oCheckbox) {
    var GridView1 = document.getElementById('gvDataList');
    for (i = 1; i < gvDataList.rows.length; i++) {
        GridView1.rows[i].cells[0].getElementsByTagName("INPUT")[0].checked = oCheckbox.checked;
    }
}

后台：

1：GridView翻页PageIndexChanging事件中调用获取多选主键信息,还需要判断一下，翻页之前是否已经有数据选中。具体方法如下:

方法如下：

#region 存储GridView翻页数据主键
        /// <summary>
        /// 存储GridView翻页数据主键
        /// </summary>
        private void RememberOldValues()
        {
            Dictionary<string, string> list = Session["SelectedObject"] as Dictionary<string, string>;
            if (list == null)
            {
                list = new Dictionary<string, string>();
            }
            foreach (GridViewRow row in gvDataList.Rows)
            {
                CheckBox cb = (CheckBox)row.FindControl("chkSelect");
                string user = gvDataList.DataKeys[row.RowIndex].Value.ToString();
                if (Session["SelectedObject"] != null)
                    list = (Dictionary<string, string>)Session["SelectedObject"]; //很重要
                if (cb.Checked)
                {
                    if (!list.ContainsKey(user))
                    {
                        list.Add(user, "null");
                    }
                }
                else
                {
                    if (list.ContainsKey(user))
                    {
                        list.Remove(user);
                    }
                }
                if (list != null && list.Count > 0)
                    Session["SelectedObject"] = list;
            }

        }
        #endregion

附带GridView自带分页：

#region  分页
        protected void gvDataList_PageIndexChanging(object sender, GridViewPageEventArgs e)
        {
            RememberOldValues();
            // 得到该控件
            GridView theGrid = sender as GridView;
            int newPageIndex = 0;
            if (e.NewPageIndex == -3)
            {
                //点击了Go按钮
                TextBox txtNewPageIndex = null;

                //GridView较DataGrid提供了更多的API，获取分页块可以使用BottomPagerRow 或者TopPagerRow，当然还增加了HeaderRow和FooterRow
                GridViewRow pagerRow = theGrid.BottomPagerRow;

                if (pagerRow != null)
                {
                    //得到text控件
                    txtNewPageIndex = pagerRow.FindControl("txtNewPageIndex") as TextBox;
                }
                if (txtNewPageIndex != null)
                {
                    //得到索引
                    newPageIndex = int.Parse(txtNewPageIndex.Text) - 1;
                }
            }
            else
            {
                //点击了其他的按钮
                newPageIndex = e.NewPageIndex;
            }
            //防止新索引溢出
            newPageIndex = newPageIndex < 0 ? 0 : newPageIndex;
            newPageIndex = newPageIndex >= theGrid.PageCount ? theGrid.PageCount - 1 : newPageIndex;

            //得到新的值
            theGrid.PageIndex = newPageIndex;

            //重新绑定
            BindItems(0, NodeID, strSearch);
        }
        #endregion

2：点击提交按钮时，需要获取下GridView中的多选主键ID

#region 获取单选按钮选中的主键ID
        /// <summary>
        /// 获取单选按钮选中的主键ID
        /// </summary>
        /// <returns></returns>
        private void GetPkID()
        {
            Dictionary<string, string> list = Session["SelectedObject"] as Dictionary<string, string>;
            if (list == null)
            {
                list = new Dictionary<string, string>();
            }
            foreach (GridViewRow row in gvDataList.Rows)
            {
                CheckBox cb = (CheckBox)row.FindControl("chkSelect");
                string user = gvDataList.DataKeys[row.RowIndex].Value.ToString();
                if (cb.Checked)
                {
                    if (!list.ContainsKey(user))
                    {
                        list.Add(user, "null");
                    }
                }
                else
                {
                    if (list.ContainsKey(user))
                    {
                        list.Remove(user);
                    }
                }
            }
            ViewState["SelectedObject"] = list;   
        }
        #endregion