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ASP.NET数据库操作类实例

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本文实例讲述了ASP.NET数据库操作类。分享给大家供大家参考,具体如下:

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using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
namespace Mysqlserver
{
   /// <summary>
   /// SqlServerDataBase 的摘要说明
   /// </summary>
   public class SqlServerDataBase
   {
     private string strError = null ;
     private int intCount = 0;
     public SqlServerDataBase()
     {
       //
       // TODO: 在此处添加构造函数逻辑
       //
     }
     /// <summary>
     /// 公开方法DBConn,返回数据库连接
     /// </summary>
     /// <returns></returns>
     public SqlConnection DBconn()
     {
       string strConn = "Server=(local);Database=GlobalMeetings;Uid=sa;pwd=" ;
       try
       {
         return new SqlConnection(strConn);
       }
       catch (Exception)
       {
         return null ;
       }
     }
     /// <summary>
     /// 公开属性ErrorMessage,返回错误信息
     /// </summary>
     public string ErrorMessage
     {
       get
       {
         return strError;
       }
     }
     /// <summary>
     /// 根据查询语句从数据库检索数据
     /// </summary>
     /// <param name="strSelect">查询语句</param>
     /// <param name="SqlConn">数据库连接</param>
     /// <returns>有数据则返回DataSet对象,否则返回null</returns>
     public DataSet Select( string SelectString, SqlConnection sqlConn)
     {
       strError = "" ;
       SqlConnection conn;
       if (sqlConn == null )
       {
         conn = DBconn();
       }
       else
       {
         conn = sqlConn;
       }
       try
       {
         //若数据库连接的当前状态是关闭的,则打开连接
         if (conn.State == ConnectionState.Closed)
         {
           conn.Open();
         }
         SqlDataAdapter mySqlDataAdapter = new SqlDataAdapter();
         SqlCommand selectCommand = new SqlCommand(SelectString, conn);
         selectCommand.CommandType = CommandType.Text;
         mySqlDataAdapter.SelectCommand = selectCommand;
         DataSet myDS = new DataSet();
         mySqlDataAdapter.Fill(myDS);
         return myDS;
       }
       catch (Exception e)
       {
         strError = "数据检索失败:" + e.Message;
         return null ;
       }
       finally
       {
         if (conn.State != ConnectionState.Closed)
         {
           conn.Close();
         }
       }
     }
     /// <summary>
     /// 更新数据库
     /// </summary>
     /// <param name="UpdateString">Update Sql语句</param>
     /// <param name="SqlConn">数据库连接</param>
     /// <returns>更新成功返回true</returns>
     public bool Update( string UpdateString, SqlConnection SqlConn)
     {
       return udiDataBase(UpdateString, SqlConn);
     }
     /// <summary>
     /// 从数据库中删除数据
     /// </summary>
     /// <param name="DeleteString">Delete Sql语句</param>
     /// <param name="SqlConn">数据库连接</param>
     /// <returns>删除成功返回true</returns>
     public bool Delete( string DeleteString, SqlConnection SqlConn)
     {
       return udiDataBase(DeleteString, SqlConn);
     }
     /// <summary>
     /// 把数据插入数据库
     /// </summary>
     /// <param name="InsertString">Insert Sql语句</param>
     /// <param name="SqlConn">数据库连接</param>
     /// <returns>插入成功返回true</returns>
     public bool Insert( string InsertString, SqlConnection SqlConn)
     {
       return udiDataBase(InsertString, SqlConn);
     }
     /// <summary>
     /// 根据Sql语句更新数据库
     /// </summary>
     /// <param name="UDIString">更新语句</param>
     /// <param name="SqlConn">数据库连接</param>
     /// <returns>更新成功则返回true</returns>
     public bool udiDataBase( string UDIString, SqlConnection SqlConn)
     {
       strError = "" ;
       SqlConnection conn;
       if (SqlConn == null )
       {
         conn = DBconn();
       }
       else
       {
         conn = SqlConn;
       }
       try
       {
         if (conn.State == ConnectionState.Closed)
         {
           conn.Open();
         }
         SqlCommand cmd = new SqlCommand(UDIString, conn);
         cmd.CommandType = CommandType.Text;
         intCount = cmd.ExecuteNonQuery();
         return !(intCount < 1);
       }
       catch (Exception e)
       {
         strError = "更新数据库失败:" + e.Message;
         return false ;
       }
       finally
       {
         if (conn.State != ConnectionState.Closed)
         {
           conn.Close();
         }
       }
     }
   }
}

希望本文所述对大家asp.net程序设计有所帮助.

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