using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data.SqlClient;
using System.Data;
using System.Configuration;

/// <summary>
/// autoBindDataTable 的摘要描述
/// </summary>
public class autoBindDataTable
{
    private string _strSQL = "";
    private SqlConnection _objConn = new SqlConnection(ConfigurationManager.ConnectionStrings["DBConnectionString"].ConnectionString);
    private SqlCommand _objCmd;
    private SqlDataAdapter _objDataAdapter;
    private SqlCommandBuilder _objDataCommandBuilder;
    private DataTable _objDataTable = new DataTable();

    public autoBindDataTable(string strSQL)
    {
        //
        // TODO: 在這裡新增建構函式邏輯
        //
        _strSQL = strSQL;

        try
        {
            _objConn.Open();
            _objCmd = new SqlCommand(_strSQL, _objConn);
            _objDataAdapter = new SqlDataAdapter(_objCmd);
            _objDataCommandBuilder = new SqlCommandBuilder(_objDataAdapter);
            _objDataAdapter.Fill(_objDataTable);
            _objConn.Close();
        }
        catch (Exception ex)
        {
            _objConn.Close();
            throw new Exception("Bind DataTable 發生錯誤! " + ex.Message);
        }
    }

    public DataRow newRow
    {
        get
        {
            DataRow objRow = this._objDataTable.NewRow();
            return objRow;
        }
    }

    public void updateDataTable()
    {
        try
        {
            _objConn.Open();
            _objDataAdapter.Update(_objDataTable);
            _objConn.Close();
        }
        catch (Exception ex)
        {
            _objConn.Close();
            throw new Exception("DataTable 資料庫更新發生錯誤[" + _objDataTable.TableName + "], " + ex.Message);
        }
    }

    public void disConnection()
    {
        _objConn.Close();
        _objConn.Dispose();
    }

    public DataRowCollection dataRows
    {
        get { return this._objDataTable.Rows; }
    }

    public DataRow[] selectedRows(string value)
    {
        return this._objDataTable.Select(value); 
    }

    public int columnNumber
    {
        get { return this._objDataTable.Columns.Count; }
    }

    public string columnName(int columnIndex) {
        string colName = "";

        try
        {
            colName = this._objDataTable.Columns[columnIndex].ColumnName;   
        }
        catch {

        }

        return colName;
    }
}