using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Text;
using System.IO;

namespace FineUI.Examples.grid
{
    public partial class grid_editor_cell_afteredit : PageBase
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                BindGrid();
            }
        }

        #region BindGrid

        private void BindGrid()
        {
            DataTable table = GetSourceData();

            Grid1.DataSource = table;
            Grid1.DataBind();
        }



        #endregion

        #region Events

        protected void Grid1_AfterEdit(object sender, GridAfterEditEventArgs e)
        {
            Dictionary<int, Dictionary<string, object>> modifiedDict = Grid1.GetModifiedDict();

            foreach (int rowIndex in modifiedDict.Keys)
            {
                int rowID = Convert.ToInt32(Grid1.DataKeys[rowIndex][0]);
                DataRow row = FindRowByID(rowID);

                UpdateDataRow(modifiedDict[rowIndex], row);
            }

            BindGrid();

            labResult.Text = "用户修改的数据：" + Grid1.GetModifiedData().ToString(Newtonsoft.Json.Formatting.None);

            Alert.Show("数据保存成功！（表格数据已重新绑定）");

        }

        private static void UpdateDataRow(Dictionary<string, object> rowDict, DataRow rowData)
        {
            // 姓名
            if (rowDict.ContainsKey("Name"))
            {
                rowData["Name"] = rowDict["Name"];
            }
            // 性别
            if (rowDict.ContainsKey("Gender"))
            {
                rowData["Gender"] = rowDict["Gender"];
            }
            // 入学年份
            if (rowDict.ContainsKey("EntranceYear"))
            {
                rowData["EntranceYear"] = rowDict["EntranceYear"];
            }
            // 入学日期
            if (rowDict.ContainsKey("EntranceDate"))
            {
                rowData["EntranceDate"] = rowDict["EntranceDate"];
            }
            // 是否在校
            if (rowDict.ContainsKey("AtSchool"))
            {
                rowData["AtSchool"] = rowDict["AtSchool"];
            }
            // 所学专业
            if (rowDict.ContainsKey("Major"))
            {
                rowData["Major"] = rowDict["Major"];
            }
        }


        #endregion

        #region Data

        private static readonly string KEY_FOR_DATASOURCE_SESSION = "datatable_for_grid_editor_cell";

        // 模拟在服务器端保存数据
        // 特别注意：在真实的开发环境中，不要在Session放置大量数据，否则会严重影响服务器性能
        private DataTable GetSourceData()
        {
            if (Session[KEY_FOR_DATASOURCE_SESSION] == null)
            {
                Session[KEY_FOR_DATASOURCE_SESSION] = GetDataTable();
            }
            return (DataTable)Session[KEY_FOR_DATASOURCE_SESSION];
        }

        // 根据行ID来获取行数据
        private DataRow FindRowByID(int rowID)
        {
            DataTable table = GetSourceData();
            foreach (DataRow row in table.Rows)
            {
                if (Convert.ToInt32(row["Id"]) == rowID)
                {
                    return row;
                }
            }
            return null;
        }
        
        #endregion

    }
}