Asp.net(c#)数据库操作类

1、A(c#)数据库操作类usingSystem;usingSystem.Data;usingSystem.Configuration;usingSystem.Web;usingSystem.Web.Security;usingSystem.Web.UI;usingSystem.Web.Ul.WebControls;usingSystem.Web.Ul.WebControls.WebParts;usingSystem.Web.Ul.HtmIControls;usingSystem.Data.SqlClient;namespaceMysqlserver/<summary>/SqlServ

2、erDataBase的摘要说明/</summary>publicclassSqlServerDataBaseprivatestringstrError=null;privateintintCount=0;publicSqlServerDataBase。/TOD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>v/returns>publicSqlConnectionDBconn()stringstrConn="Server=(local);Database=G

3、lobalMeetings;Uid=sa;pwd="tryreturnnewSqlConnection(strConn);catch(Exception)returnnull;/<summary>/公开属性ErrorMessage，返回错误信息/</summary>publicstringErrorMessagegetreturnstrError;/<summary>/根据查询语句从数据库检索数据/</summary>/vparamname="strSelect">查询语句</param>/vpar

4、amname="SqlConn">数据库连接</param>/<returns>有数据则返回DataSet对象，否则返回null</returns>publicDataSetSelect(stringSelectString,SqlConnectionsqlConn)strError=""SqlConnectionconn;if(sqlConn=null)conn=DBconn();elseconn=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=Connection

5、State.Closed)conn.Open();SqlDataAdaptermySqlDataAdapter=newSqlDataAdapter();SqlCommandselectCommand=newSqlCommand(SelectString,conn);selectCommand.CommandType=CommandType.Text;mySqlDataAdapter.SelectCommand=selectCommand;DataSetmyDS=newDataSet();mySqlDataAdapter.Fill(myDS);returnmyDS;catch(Exception

6、e)strError="数据检索失败："+e.Message;returnnull;finallyif(conn.State!=ConnectionState.Closed)conn.Close();/<summary>/更新数据库/</summary>/vparamname="UpdateString">UpdateSql语句</param>/vparamname="SqlConn">数据库连接</param>/<returns>更新成功返回true</r

7、eturns>publicboolUpdate(stringUpdateString,SqlConnectionSqlConn)returnudiDataBase(UpdateString,SqlConn);/<summary>/从数据库中删除数据/</summary>/vparamname="DeleteString">DeleteSql语句</param>/vparamname="SqlConn">数据库连接</param>III<returns>删除成功返回true<

8、;/returns>publicboolDelete(stringDeleteString,SqlConnectionSqlConn)returnudiDataBase(DeleteString,SqlConn);/<summary>/把数据插入数据库/</summary>/vparamname="InsertString">InsertSql语句</param>/vparamname="SqlConn">数据库连接</param>/<returns>插入成功返回true<

9、;/returns>publicboolInsert(stringInsertString,SqlConnectionSqlConn)returnudiDataBase(InsertString,SqlConn);/<summary>/根据Sql语句更新数据库/</summary>/vparamname="UDIString">更新语句</param>/vparamname="SqlConn">数据库连接</param>/vreturns>更新成功则返回truev/returns&g

10、t;publicbooludiDataBase(stringUDIString,SqlConnectionSqlConn)strError=""SqlConnectionconn;if(SqlConn=null)conn=DBconn();elseconn=SqlConn;tryif(conn.State=ConnectionState.Closed)conn.Open();SqlCommandcmd=newSqlCommand(UDIString,conn);cmd.CommandType=CommandType.Text;intCount=cmd.ExecuteNonQ

11、uery();return!(intCount<1);catch(Exceptione)strError="更新数据库失败："+e.Message;returnfalse;finallyif(conn.State!=ConnectionState.Closed)conn.Close();两种调用方法1、stringstrUserPsw=UserPsw.Text.Trim();stringUserPassword=System.Web.Security.FormsAuthentication.HashPasswordForStoringlnConfigFile(strU

12、serPsw,"MD5");/md5加密SqlServerDataBaseobj=newSqlServerDataBase();objnsert("insertintoasUserInfo(UserName,UserPassword,Question,Answer,CreateTime)values('"+UserName.Text.Trim()+"','"+UserPassword+"','"+Question.Text.Trim()+"','"+Answer.Text.Trim()+"','"+DateTime.Now.ToString()+"')",null);2、privateboolIsUsernameExist(stringstrUsername)boolbRet=true;SqlServerDataBasedb=newSqlServerDataBase()