转至繁体中文版     | 网站首页 | 文章中心 | 下载中心 | 图片中心 | 笑话频道 | 教程频道 | 会员中心 | 雁过留声 | 
最新公告:     "MinTao学以致用网"欢迎您的光临,你的支持便是我们的动力,欢迎广大网友和各界人士亲临指导,你们的一个小小的建议便是我们发展的开路石!  [MinTao  2007年9月5日]        
您现在的位置: MinTao学以致用网 >> 文章中心 >> 电子课堂 >> 数据库 >> Sql Server >> 文章正文
专题栏目
更多内容
最新推荐 更多内容
相关文章
一个通用数据库访问类(
更多内容
数据库操作类实现(C#,SqlClient)         
数据库操作类实现(C#,SqlClient)
作者:sonicit 文章来源:不详 点击数: 更新时间:2007-11-14 12:56:19
 使用ADO.NET时,每次数据库操作都要设置connection属性、建立connection、使用command、事务处理等,比较繁琐,有很多重复工作。能不能把这些繁琐的、常用的操作再封装一下,以更方便、安全地使用。下面这个类就是一种尝试:

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


  public class DBAccess
  {
   /// <summary>
   /// Declare the ole db required objects
   /// </summary>
  

   /// <summary>
   /// An ole db adapter to act as the bridge to the database
   /// </summary>
   private SqlDataAdapter dbDataAdapter;
   /// <summary>
   /// The connection to the database
   /// </summary>
   private SqlConnection dbConnection;
   /// <summary>
   /// The command for doing the inserts
   /// </summary>
   private SqlCommand dbInsertCommand;
   /// <summary>
   /// The command for doing the deletes
   /// </summary>
   private SqlCommand dbDeleteCommand;
   /// <summary>
   /// The command for doing the updates
   /// </summary>
   private SqlCommand dbUpdateCommand;
   /// <summary>
   /// The command for doing the Selects
   /// </summary>
   private SqlCommand dbSelectCommand;

   private SqlCommand dbSelectCommandofAdapter;

   /// <summary>
   /// The command for get dataset
   /// </summary>
   private SqlDataAdapter dataAdapterCommand;

   /// <summary>
   /// The data reader for the application
   /// </summary>
   public SqlDataReader dbDataReader;


   /// <summary>
   /// Declare an enum to allow internal tracking of commands
   /// </summary>
   enum COMMAND{ NONE, INSERT, UPDATE, DELETE, SELECT,DATASET };
 
   /// <summary>
   /// Internal member for tracking command progress
   /// </summary>
   private COMMAND command;

   /// <summary>
   /// String to hold error messages if a command fails
   /// </summary>
   private string error;

   /// <summary>
   /// Get a stored error message if ExecuteCommand fails
   /// </summary>
   public string ErrorMessage
   {
    get
    {
     return error;
    }
   }

   /// <summary>
   /// bool holder for is open
   /// </summary>
   private bool bOpen;

   /// <summary>
   /// Check to see if a data base is open
   /// </summary>
   public bool IsOpen
   {
    get
    {
     return bOpen;
    }
   }


   /// <summary>
   /// Declare a string object for the insert command
   /// </summary>
   public string InsertCommand 
   {
    get
    {
     return dbInsertCommand.CommandText;
    }
    set 
    {
     command = COMMAND.INSERT;
     dbInsertCommand.CommandText = value;
    }
   }

   /// <summary>
   /// Declare a string object for the delete command
   /// </summary>
   public string DeleteCommand
   {
    get
    {
     return dbDeleteCommand.CommandText;
    }
    set
    {
     command = COMMAND.DELETE;
     dbDeleteCommand.CommandText = value;
    }
   }

   /// <summary>
   /// Declare a string object for the update command
   /// </summary>
   public string UpdateCommand
   {
    get
    {
     return dbUpdateCommand.CommandText;
    }
    set
    {
     command = COMMAND.UPDATE;
     dbUpdateCommand.CommandText = value;
    }
   }

   /// <summary>
   /// Declare a string object for the select command
   /// </summary>
   public string SelectCommand
   {
    get
    {
     return dbSelectCommand.CommandText;
    }
    set
    {
     command = COMMAND.SELECT;
     dbSelectCommand.CommandText = value;
    }
   }

   public string SelectDataSetCommand
   {
    get
    {
     return dataAdapterCommand.SelectCommand.CommandText;
    }
    set
    {
     command = COMMAND.DATASET;
     dataAdapterCommand.SelectCommand.CommandText = value;
    }
   }

   /// <summary>
   /// Get the reader from the class
   /// </summary>
   public SqlDataReader GetReader
   {
    get
    {
     switch( command )
     {
      case COMMAND.NONE: retu

[1] [2] [3] [4] 下一页

文章录入:mintao    责任编辑:mintao 
  • 上一篇文章:

  • 下一篇文章:
  • 【字体: 】【发表评论】【加入收藏】【告诉好友】【打印此文】【关闭窗口
      注:本站部分文章源于互联网,版权归原作者所有!如有侵权,请原作者与本站联系,本站将立即删除! 本站文章除特别注明外均可转载,但需注明出处! [MinTao学以致用网]
      网友评论:(只显示最新10条。评论内容只代表网友观点,与本站立场无关!)

    | 设为首页 |加入收藏 | 联系站长 | 友情链接 | 版权申明 | 广告服务
    MinTao学以致用网

    Copyright @ 2007 MinTao学以致用网(www.mintao.net) Inc All Rights Reserved.
    QQ:543098146有事请Q我! QQ:261561092有事请Q我 QQ:179647303有事请Q我 MSN:min906@126.com
    站长:MinTao 信息产业部ICP备案号:鄂ICP备07500065号

    学以致用是我们学习者的至高境界和不懈追求,[MinTao学以致用网]与大家共同学习,共同进步……
    信息产业部备案
    *鄂ICP备07500065号