具体如下:
using 系统; using System.Data; using System.Configuration; using 包含; 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 {///才能,& lt; summary>///才能,SqlServerDataBase 的摘要说明///才能,& lt;/summary> public 才能;class  SqlServerDataBase {才能 ,,,private string strError =,空; ,,,private int intCount =, 0; ,,,public SqlServerDataBase () ,,,{ ,,,,//,,,,,//,待办事项:,在此处添加构造函数逻辑 ,,,,//,,,} ,,,///,& lt; summary> ,,,///,公开方法DBConn,返回数据库连接 ,,,///,& lt;/summary> ,,,///,& lt; returns> & lt;/returns> ,,,public SqlConnection DBconn () ,,,{ ,,,,,string strConn =,“服务器=(当地);数据库=GlobalMeetings; Uid=sa; pwd=? ,,,,,试一试 ,,,,,{ ,,,,,,,return new SqlConnection (strConn); ,,,,,} ,,,,,catch (异常) ,,,,,{ ,,,,,,,return 零; ,,,,,} ,,,} ,,,///,& lt; summary> ,,,///,公开属性ErrorMessage,返回错误信息 ,,,///,& lt;/summary> ,,,public string ErrorMessage ,,,{ ,,,,, ,,,,,{ ,,,,,,,return strError; ,,,,,} ,,,} ,,,///,& lt; summary> ,,,///,根据查询语句从数据库检索数据 ,,,///,& lt;/summary> ,,,///,& lt; param name=皊trSelect"在查询语句& lt;/param> ,,,///,& lt; param name=癝qlConn"在数据库连接& lt;/param> ,,,///,& lt; returns>有数据则返回数据集对象,否则返回null ,,,public DataSet 选择(string SelectString, SqlConnection sqlConn) ,,,{ ,,,,,strError =,““ ,,,,,SqlConnection 康涅狄格州; ,,,,,if (sqlConn ==, null) ,,,,,{ ,,,,,,,conn =, DBconn (); ,,,,,} ,,,,, ,,,,,{ ,,,,,,,conn =, sqlConn; ,,,,,} ,,,,,试一试 ,,,,,{ ,,,,,,,//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,康涅狄格州); ,,,,,,,selectCommand.CommandType =, CommandType.Text; ,,,,,,,mySqlDataAdapter.SelectCommand =, selectCommand; ,,,,,,,DataSet myDS =, new 数据集(); ,,,,,,,mySqlDataAdapter.Fill (myDS); ,,,,,,,return myDS; ,,,,,} ,,,,,catch (Exception e) ,,,,,{ ,,,,,,,strError =,“数据检索失败:“,+,e.Message; ,,,,,,,return 零; ,,,,,} ,,,,最后 null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null null nullASP.NET中怎么实现一个数据库操作类