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_delete : PageBase
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                // 删除选中行
                btnDelete.OnClientClick = Grid1.GetNoSelectionAlertReference("请至少选择一项！");
                btnDelete.ConfirmText = "确定删除选中单元格所在的行？";


                //btnDelete.ConfirmText = String.Format("你确定要删除第&nbsp;<b><script>({0}[0]+1)</script></b>&nbsp;行数据吗？", Grid1.GetSelectedCellReference());

                //// 重置表格
                //btnReset.OnClientClick = Grid1.GetRejectChangesReference();

                BindGrid();
            }
        }

        #region BindGrid

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

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



        #endregion

        #region Events

        protected void btnDelete_Click(object sender, EventArgs e)
        {
            StringBuilder sb = new StringBuilder();
            if (Grid1.SelectedCell != null)
            {
                // 注意设置表格的 DataIdField 属性，则 SelectedCell[0] 就是选中单元格所在的行ID
                int rowID = Convert.ToInt32(Grid1.SelectedCell[0]);
                DeleteRowByID(rowID);

                BindGrid();

                Alert.ShowInTop("删除数据成功!（表格数据已重新绑定）");
            }
            else
            {
                Alert.ShowInTop("没有选中任何单元格！");
            }

        }

        protected void Grid1_RowCommand(object sender, GridCommandEventArgs e)
        {
            if (e.CommandName == "Delete")
            {
                int rowID = Convert.ToInt32(Grid1.DataKeys[e.RowIndex][0]);
                DeleteRowByID(rowID);

                BindGrid();

                Alert.ShowInTop("删除数据成功!（表格数据已重新绑定）");
            }
        }


        protected void Button2_Click(object sender, EventArgs 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 = String.Format("用户修改的数据：<pre>{0}</pre>", Grid1.GetModifiedData().ToString(Newtonsoft.Json.Formatting.Indented));

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

        private void UpdateDataRow(Dictionary<string, object> rowDict, DataRow rowData)
        {
            // 姓名
            UpdateDataRow("Name", rowDict, rowData);

            // 性别
            UpdateDataRow("Gender", rowDict, rowData);

            // 入学年份
            UpdateDataRow("EntranceYear", rowDict, rowData);

            // 入学日期
            UpdateDataRow("EntranceDate", rowDict, rowData);

            // 是否在校
            UpdateDataRow("AtSchool", rowDict, rowData);

            // 所学专业
            UpdateDataRow("Major", rowDict, rowData);

        }

        private void UpdateDataRow(string columnName, Dictionary<string, object> rowDict, DataRow rowData)
        {
            if (rowDict.ContainsKey(columnName))
            {
                rowData[columnName] = rowDict[columnName];
            }
        }


        #endregion

        #region Data

        private static readonly string KEY_FOR_DATASOURCE_SESSION = "datatable_for_grid_editor_cell_delete";

        // 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] = DataSourceUtil.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;
        }

        // 根据行ID来删除行数据
        private void DeleteRowByID(int rowID)
        {
            DataTable table = GetSourceData();

            DataRow found = FindRowByID(rowID);
            if (found != null)
            {
                table.Rows.Remove(found);
            }
        }


        #endregion
    }
}