数据库操作基类,实现对Sql数据库的各种操作

using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;

namespace GoodIdea.CMS.DBUtility
{
/// <summary>
/// 数据库操作基类
/// 实现对Sql数据库的各种操作
/// 创建时间：2006-8-3
/// </summary>
public class SqlDataBase
{
   //获取Web.Config数据库连接字符串
   private readonly string SqlConnectionString = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;

   private SqlConnection cn; //创建SQL连接
   private SqlDataAdapter sda; //创建SQL数据适配器
   private SqlDataReader sdr; //创建SQL数据读取器
   private SqlCommand cmd; //创建SQL命令对象
   private SqlParameter param; //创建SQL参数
   private DataSet ds; //创建数据集
   private DataView dv; //创建视图

   /// <summary>
   /// 打开数据库连接
   /// </summary>
   public void Open()
   {
      #region
      cn = new SqlConnection(SqlConnectionString);
      cn.Open();
      #endregion
   }

   /// <summary>
   /// 关闭数据库连接
   /// </summary>
   public void Close()
   {
      #region
      if (cn != null)
      {
            cn.Close();
            cn.Dispose();
      }
      #endregion
   }

   /// <summary>
   /// 返回DataSet数据集
   /// </summary>
   /// <param name="strSql">SQL语句</param>
   public DataSet GetDs(string strSql)
   {
      #region
      Open();
      sda = new SqlDataAdapter(strSql, cn);
      ds = new DataSet();
      sda.Fill(ds);
      Close();
      return ds;
      #endregion
   }

   /// <summary>
   /// 添加DataSet表
   /// </summary>
   /// <param name="ds">DataSet对象</param>
   /// <param name="strSql">Sql语句</param>
   /// <param name="strTableName">表名</param>
   public void GetDs(DataSet ds, string strSql, string strTableName)
   {
      #region
      Open();
      sda = new SqlDataAdapter(strSql, cn);
      sda.Fill(ds, strTableName);
      Close();
      #endregion
   }

   /// <summary>
   /// 返回DataView数据视图
   /// </summary>
   /// <param name="strSql">Sql语句</param>
   public DataView GetDv(string strSql)
   {
      #region
      dv = GetDs(strSql).Tables[0].DefaultView;
      return dv;
      #endregion
   }

   /// <summary>
   /// 获得DataTable对象
   /// </summary>
   /// <param name="strSql">SQL语句</param>
   /// <returns></returns>
   public DataTable GetTable(string strSql)
   {
      #region
      return GetDs(strSql).Tables[0];
      #endregion
   }

   /// <summary>